The Plant List — A working list for all plant species

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You should refer instead to the current version of The Plant List.

Results

No plant names match your search for Oncidium guianensis; we will try Oncidium instead.

1417 plant name records match your search criteria Oncidium. The results are below.

• Genus Oncidium is in the family Orchidaceae. Species epithets begin with: A B C D E F G H I J K L M N O P Q R S T U V W X Z

The results can also be downloaded as a CSV file.

See "Status", "Confidence level", "Source" for definitions.

Name	Status	Confi­dence level	Source
Oncidium aberrans Schltr.	Synonym		WCSP
Oncidium abortivoides M.W.Chase & N.H.Williams	Unresolved		WCSP (in review)
Oncidium abortivum Rchb.f.	Accepted		WCSP
Oncidium abruptum Linden & Rchb.f. ex Kraenzl.	Accepted		WCSP
Oncidium abruptum Linden & Rchb. f.	Unresolved		TRO
Oncidium acinaceum Lindl.	Accepted		WCSP
Oncidium aconitiflorum Mansf.	Unresolved		TRO
Oncidium acrobotryum Klotzsch	Synonym		WCSP
Oncidium acrochordonia Rchb.f. ex Kraenzl.	Synonym		WCSP
Oncidium × acuminatissimum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium adamantinum Marçal & Cath.	Accepted		WCSP
Oncidium adamsii (Dodson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium adelaidae Königer	Accepted		WCSP
Oncidium adelaidae (Königer) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium × adrianae (L.Linden) M.W.Chase & N.H.Williams	Unresolved		WCSP (in review)
Oncidium advena Rchb.f.	Synonym		WCSP
Oncidium aemulum Rchb.f. & Warsz.	Synonym		WCSP
Oncidium aequinoctiale Stacy	Synonym		WCSP
Oncidium alatum Cogn.	Synonym		WCSP
Oncidium alberti (P. Ortiz) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium albicans Königer	Accepted		WCSP
Oncidium albini Schltr.	Accepted		WCSP
Oncidium alboviolaceum A.Rich. & Galeotti	Synonym		WCSP
Oncidium alcicorne Rchb.f.	Synonym		WCSP
Oncidium alexandrae (Bateman) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium alfredii Kraenzl. [Illegitimate]	Synonym		WCSP
Oncidium allemanii Barb.Rodr.	Synonym		WCSP
Oncidium allenii Dressler	Accepted		WCSP
Oncidium aloisii Schltr.	Synonym		WCSP
Oncidium alticola Stacy	Synonym		WCSP
Oncidium altissimum Lindl. [Illegitimate]	Synonym		WCSP
Oncidium altissimum (Jacq.) Sw.	Accepted		WCSP
Oncidium altissimum var. Beta Lindl.	Synonym		TRO
Oncidium altissimum var. baueri (Lindl.) Stein	Synonym		WCSP
Oncidium alvarezii (P. Ortiz) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium amabile Rchb.f.	Accepted		WCSP
Oncidium amazonicum (Schltr.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium amictum Lindl.	Accepted		WCSP
Oncidium amoenum A.Rich. & Galeotti	Accepted		WCSP
Oncidium ampliatum Lindl.	Synonym		WCSP
Oncidium ampliatum var. majus Lindl.	Synonym		WCSP
Oncidium anceps Beer	Synonym		WCSP
Oncidium anceps (Klotzsch) Rchb.f.	Synonym		WCSP
Oncidium × andersonianum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium andigenum Linden & Rchb.f.	Synonym		WCSP
Oncidium andradeanum Dodson & D.E.Benn.	Accepted		WCSP
Oncidium andreae Königer	Synonym		WCSP
Oncidium andreanum (Cogn.) Garay	Synonym		WCSP
Oncidium anfractum Rolfe	Synonym		WCSP
Oncidium angustisegmentum D.E.Benn. & Christenson	Accepted		WCSP
Oncidium angustisepalum Kraenzl.	Synonym		WCSP
Oncidium × ann-hadderae Moir [Unplaced]	Unresolved		WCSP
Oncidium annulare Rchb.f.	Synonym		WCSP
Oncidium anomalum Rchb.f.	Synonym		WCSP
Oncidium ansiferum Rchb.f.	Accepted		WCSP
Oncidium antherotes Rchb. f.	Unresolved		TRO
Oncidium anthocrene Rchb.f.	Accepted		WCSP
Oncidium antioquiense Kraenzl.	Accepted		WCSP
Oncidium apiculatum Moir	Synonym		WCSP
Oncidium apterum (Lex.) Beer	Synonym		WCSP
Oncidium arangoi (Königer) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium ariasii Königer	Accepted		WCSP
Oncidium ariasii (Königer) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium arietinum Kraenzl.	Synonym		WCSP
Oncidium aristulliferum (Kraenzl.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium arizajulianum Withner & J.Jiménez Alm.	Synonym		WCSP
Oncidium armatum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium armillare Lindl.	Synonym		WCSP
Oncidium articulatum E.S.Rand	Synonym		WCSP
Oncidium ascendens Lindl.	Synonym		WCSP
Oncidium asparagoides Kraenzl.	Synonym		WCSP
Oncidium aspecum Königer	Synonym		WCSP
Oncidium aspidorhinum (F. Lehm.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium astranthum (Linden & Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium atropurpureum Beer	Unresolved		TRO
Oncidium aurarium Rchb.f.	Accepted		WCSP
Oncidium aureum Lindl.	Synonym		WCSP
Oncidium aureum var. stenochilum Lindl.	Synonym		WCSP
Oncidium auricula (Vell.) Pabst	Accepted		WCSP
Oncidium auriculatoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium auriculatum (Rolfe) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium auriferum Rchb.f.	Accepted		WCSP
Oncidium aurisasinorum Standl. & L.O.Williams	Synonym		WCSP
Oncidium auropurpureum (Rchb.f.) Beer	Synonym		WCSP
Oncidium aurorae D.E.Benn. & Christenson	Synonym		WCSP
Oncidium aurosum Rchb.f. & Warsz.	Synonym		WCSP
Oncidium ayabacanum D.E.Benn. & Christenson	Accepted		WCSP
Oncidium azuayense Kraenzl.	Synonym		WCSP
Oncidium baccatum Garay & Dunst.	Accepted		WCSP
Oncidium bahamense Nash	Synonym		WCSP
Oncidium bahiense (Cogn.) Schltr.	Synonym		WCSP
Oncidium baldeviamae Rchb.f.	Synonym		WCSP
Oncidium ballii Rolfe	Synonym		WCSP
Oncidium barahonensis hort. ex Moir	Unresolved		TRO
Oncidium barbaceniae Lindl.	Accepted		WCSP
Oncidium barbatum Lindl.	Accepted		WCSP
Oncidium barbatum Lindl. & Paxton [Illegitimate]	Synonym		WCSP
Oncidium barbatum var. ciliatum (Lindl.) Lindl.	Synonym		WCSP
Oncidium barbatum var. johnianum (Schltr.) Kraenzl.	Synonym		WCSP
Oncidium barbatum var. labiosum W.Zimm.	Synonym		WCSP
Oncidium barbatum subsp. limbatum (Lindl.) W.Zimm.	Synonym		WCSP
Oncidium barbatum var. limbatum Lindl.	Synonym		WCSP
Oncidium barbatum subsp. microglossum (Klotzsch) W.Zimm.	Synonym		WCSP
Oncidium barkeri Lindl.	Synonym		WCSP
Oncidium batemanianum Parm. ex Knowles & Westc.	Synonym		WCSP
Oncidium batemanianum Griseb. [Illegitimate]	Synonym		WCSP
Oncidium batemanianum var. ramosum (Lindl.) Lindl.	Synonym		WCSP
Oncidium batemanianum var. spilopterum (Lindl.) Lindl.	Synonym		WCSP
Oncidium batemannianum Parm. ex Knowles & Westc.	Accepted		TRO
Oncidium batemannianum Cogn.	Synonym		TRO
Oncidium baueri Lindl.	Accepted		WCSP
Oncidium befortianum Königer	Accepted		WCSP
Oncidium bennettii Christenson	Accepted		WCSP
Oncidium berenyce Rchb.f.	Synonym		WCSP
Oncidium bernoullianum Kraenzl.	Synonym		WCSP
Oncidium beyrodtianum Schltr.	Synonym		WCSP
Oncidium beyrodtioides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium bicallosoides M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium bicallosum Lindl.	Synonym		WCSP
Oncidium bicameratum Rchb.f. ex Kraenzl.	Synonym		WCSP
Oncidium bicolor (Lindl.) Beer [Illegitimate]	Synonym		WCSP
Oncidium bicolor Lindl.	Accepted		WCSP
Oncidium bicornutum Hook.	Synonym		WCSP
Oncidium bictoniense hort. ex Lindl.	Unresolved		TRO
Oncidium bidens (Lindl.) Rchb.f.	Synonym		WCSP
Oncidium bidentatum Rolfe	Synonym		WCSP
Oncidium biflorum Barb.Rodr.	Synonym		WCSP
Oncidium bifolium Sims	Accepted		WCSP
Oncidium bifolium var. majus hort. ex B.S. Williams	Accepted		TRO
Oncidium bifrons Lindl.	Synonym		WCSP
Oncidium bilamellatum Kraenzl.	Synonym		WCSP
Oncidium bismarckii D.E.Benn. & Christenson	Synonym		WCSP
Oncidium blanchetii Rchb.f.	Accepted		WCSP
Oncidium blandum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium blossfeldianum Schltr.	Synonym		WCSP
Oncidium × bluntii Rchb.f.	Synonym		WCSP
Oncidium boddaertianum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium bohnkianum V.P.Castro & G.F.Carr	Accepted		WCSP
Oncidium boissieri Kraenzl.	Synonym		WCSP
Oncidium bolivianense Oppenheim	Synonym		WCSP
Oncidium bolivianum Schltr.	Synonym		WCSP
Oncidium boliviense Rolfe	Synonym		WCSP
Oncidium boothianum Rchb.f.	Accepted		WCSP
Oncidium boydii Lindl.	Synonym		WCSP
Oncidium brachiatum (Lindl.) Rchb.f.	Synonym		WCSP
Oncidium brachyandrum Lindl.	Accepted		WCSP
Oncidium brachyandrum var. johannis (Schltr.) L.O.Williams	Synonym		WCSP
Oncidium brachyphyllum Lindl.	Synonym		WCSP
Oncidium brachypterum Linden & Rchb.f.	Synonym		WCSP
Oncidium brachystachys Kraenzl.	Accepted		WCSP
Oncidium brachystegium Kraenzl.	Synonym		WCSP
Oncidium bracteatum Warsz. & Rchb.f.	Accepted		WCSP
Oncidium × brandtii (Kraenzl. & Wittm.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium brassia Rchb.f.	Synonym		WCSP
Oncidium braunii Regel	Accepted		WCSP
Oncidium brenesii Schltr.	Synonym		WCSP
Oncidium brevicorne (Königer & J.Portilla) M.W.Chase & N.H.Williams	Unresolved		WCSP (in review)
Oncidium brevicornis M.W. Chase & N.H. Williams	Unresolved		TRO
Oncidium brevifolium A.Rich. & Galeotti	Synonym		WCSP
Oncidium brevilabrum Rolfe	Accepted		WCSP
Oncidium brienianum Rchb.f.	Accepted		WCSP
Oncidium brownii (Garay) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium brunleesianum Rchb.f.	Accepted		WCSP
Oncidium brunnipetalum Barb.Rodr.	Synonym		WCSP
Oncidium bryocladium Schltr.	Accepted		WCSP
Oncidium bryolophotum Rchb.f.	Accepted		WCSP
Oncidium buchtienii Schltr.	Accepted		WCSP
Oncidium buchtienoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium bustosii Königer	Accepted		WCSP
Oncidium cabagrae Schltr.	Synonym		WCSP
Oncidium caerulescens (A.Rich. & Galeotti) Beer	Synonym		WCSP
Oncidium caesium Rchb.f.	Synonym		WCSP
Oncidium cajamarcae Schltr.	Accepted		WCSP
Oncidium calacallaense (D.E. Benn. & Christenson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium calanthum Rchb.f.	Accepted		WCSP
Oncidium caldense Rchb.f.	Accepted		WCSP
Oncidium calimanianum (Guiard) Königer	Accepted		WCSP
Oncidium callistum Rchb.f. ex Kraenzl.	Synonym		WCSP
Oncidium calobulbon Linden & Rchb.f.	Synonym		WCSP
Oncidium calochilum Cogn.	Synonym		WCSP
Oncidium caloglossum Rchb.f.	Synonym		WCSP
Oncidium calyptostalix Kraenzl.	Synonym		WCSP
Oncidium caminiophorum Rchb.f.	Synonym		WCSP
Oncidium candelabrum Linden	Synonym		WCSP
Oncidium candidum (Lindl.) Rchb.f. [Illegitimate]	Synonym		WCSP
Oncidium candidum Lindl.	Synonym		WCSP
Oncidium caquetanum (Schltr.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium carderi Rchb.f.	Synonym		WCSP
Oncidium cardiochilum Lindl.	Synonym		WCSP
Oncidium cardioglossum (Pupulin) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium cardiostigma Rchb.f.	Accepted		WCSP
Oncidium caribense Moir	Synonym		WCSP
Oncidium carinatum Knowles & Westc.	Synonym		WCSP
Oncidium cariniferum (Rchb.f.) Beer	Accepted		WCSP
Oncidium carthagenense (Jacq.) Sw.	Synonym		WCSP
Oncidium carthagenense var. andreanum Cogn.	Synonym		WCSP
Oncidium carthagenense var. klotzschii Lindl.	Synonym		WCSP
Oncidium carthagenense var. oerstedii (Rchb.f.) Lindl.	Synonym		WCSP
Oncidium carthagenense var. sanguineum (Lindl.) Lindl.	Synonym		WCSP
Oncidium carthagenense var. swartzii Lindl.	Synonym		WCSP
Oncidium × cassolanum V.P.Castro & Campacci	Accepted		WCSP
Oncidium castaneum Rchb.f. ex Kraenzl.	Synonym		WCSP
Oncidium castaneum Rchb. f. ex L. Linden	Synonym		TRO
Oncidium caucanum Schltr.	Accepted		WCSP
Oncidium caudatum (L.) Rchb.f.	Synonym		WCSP
Oncidium cavendishianum Bateman	Synonym		WCSP
Oncidium caymanense Moir	Synonym		WCSP
Oncidium cebolleta (Jacq.) Sw.	Synonym		WCSP
Oncidium cebolleta var. purum L.C.Menezes	Synonym		WCSP
Oncidium cebolleta f. purum (L.C.Menezes) F.Barros & J.A.N.Bat.	Synonym		WCSP
Oncidium celsianum A.Rich.	Synonym		WCSP
Oncidium celsissimum Hoffmanns.	Unresolved		TRO
Oncidium centifrancum Rchb.f.	Synonym		WCSP
Oncidium centrifrancum Rchb. f.	Synonym		TRO
Oncidium cepula Hoffmanns.	Synonym		WCSP
Oncidium cerebriferum Rchb.f.	Synonym		WCSP
Oncidium cervantesii (Lex.) Beer	Synonym		WCSP
Oncidium chapadense V.P.Castro & Campacci	Accepted		WCSP
Oncidium × charlesworthii H.J.Veitch	Accepted		WCSP
Oncidium chasei (D.E. Benn. & Christenson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium cheiri Rchb.f. ex Kraenzl.	Synonym		WCSP
Oncidium cheirophoroides Kraenzl.	Synonym		WCSP
Oncidium cheirophorum Rchb.f.	Accepted		WCSP
Oncidium cheirophorum var. exauriculatum Hamer & Garay	Synonym		WCSP
Oncidium chelidon Kraenzl.	Synonym		WCSP
Oncidium chelidonizon Kraenzl.	Synonym		WCSP
Oncidium chimborazoense Stacy	Synonym		WCSP
Oncidium chiriquense (Rchb.f.) Beer	Synonym		WCSP
Oncidium chrysodipterum A.H.Kent	Synonym		WCSP
Oncidium chrysodipterum H.J. Veitch	Synonym		TRO
Oncidium chrysodipterum var. claesianum Cogn.	Synonym		WCSP
Oncidium chrysomorphum Lindl.	Accepted		WCSP
Oncidium chrysops Rchb.f.	Synonym		WCSP
Oncidium chrysopteranthum Lückel	Accepted		WCSP
Oncidium chrysopterum (Lindl.) Kraenzl.	Accepted		WCSP
Oncidium chrysopyramis Rchb.f. & Warsz.	Synonym		WCSP
Oncidium chrysorapis Rchb. f.	Synonym		TRO
Oncidium chrysorhapis Rchb.f.	Synonym		WCSP
Oncidium chrysornis Rchb.f.	Synonym		WCSP
Oncidium chrysothyrsus Rchb.f. ex R.Warner	Synonym		WCSP
Oncidium ciliatulum Hoffmanns. ex Lindl.	Synonym		WCSP
Oncidium ciliatum Lindl.	Accepted		WCSP
Oncidium ciliolatum Hoffmanns.	Synonym		WCSP
Oncidium cimiciferum (Rchb.f.) Beer	Synonym		WCSP
Oncidium cimiciferum (Rchb. f.) Rchb. f. ex Lindl.	Synonym		TRO
Oncidium cimiferum Rchb.f. ex Linden [Spelling variant]	Synonym		WCSP
Oncidium cinnabarinum (Linden ex Lindl.) Rchb.f.	Synonym		WCSP
Oncidium cinnamomeum (hort. ex H. Williams) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium cirrhosum (Lindl.) Beer	Synonym		WCSP
Oncidium citrinum Lindl.	Accepted		WCSP
Oncidium citrinum var. rotundatum Regel	Synonym		WCSP
Oncidium citrinum var. verum Regel	Synonym		WCSP
Oncidium citrosmum (Lindl.) Beer	Synonym		WCSP
Oncidium claesii Rolfe	Synonym		WCSP
Oncidium clowesii (Lindl.) Rchb.f.	Synonym		WCSP
Oncidium cocciferum Rchb.f. & Warsz.	Synonym		WCSP
Oncidium cochleatum Lindl.	Synonym		WCSP
Oncidium cogniauxianum Schltr.	Accepted		WCSP
Oncidium × colnagoi Pabst	Accepted		WCSP
Oncidium coloratum Königer & J.G.Weinm.bis	Accepted		WCSP
Oncidium columbae Rchb. ex Lindl. [Invalid]	Synonym		WCSP
Oncidium compressicaule Withner	Synonym		WCSP
Oncidium concavum Moir	Synonym		WCSP
Oncidium concolor Hook.	Accepted		WCSP
Oncidium concolor var. ottonis (Schltr.) Pabst	Synonym		WCSP
Oncidium confragosum Lindl.	Synonym		WCSP
Oncidium confusum Rchb.f.	Synonym		WCSP
Oncidium constrictum (Lindl.) Beer	Synonym		WCSP
Oncidium contaypacchaense (D.E. Benn. & Christenson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium convolvulaceum Lindl. & Paxton	Synonym		WCSP
Oncidium × cookianum (Rolfe) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium coradinei (Rchb.f.) M.W.Chase & N.H.Williams	Unresolved		WCSP (in review)
Oncidium cordatum Lindl.	Synonym		WCSP
Oncidium cornigerum Lindl.	Accepted		WCSP
Oncidium coronarium (Lindl.) Beer	Synonym		WCSP
Oncidium corynephorum Lindl.	Synonym		WCSP
Oncidium costaricense Schltr.	Synonym		WCSP
Oncidium costatum (Lindl.) Beer	Synonym		WCSP
Oncidium cosymbephorum C.Morren	Synonym		WCSP
Oncidium crassopterum Chiron	Accepted		WCSP
Oncidium crescentilabium (C. Schweinf.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium crinitum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium crispum Lodd. ex Lindl.	Accepted		WCSP
Oncidium crispum Lodd.	Unresolved		TRO
Oncidium crispum var. aureum auct.	Synonym		WCSP
Oncidium crispum var. flabellulatum Lindl.	Synonym		WCSP
Oncidium crispum var. grandiflorum auct.	Synonym		WCSP
Oncidium crispum var. limbatum Cogn.	Synonym		WCSP
Oncidium crispum var. lionetianum Cogn.	Synonym		WCSP
Oncidium crispum var. ochraceum Rchb.f.	Synonym		WCSP
Oncidium crispum var. olivaceum Rchb.f.	Synonym		WCSP
Oncidium crispum var. rodriguesii Cogn.	Synonym		WCSP
Oncidium crispum var. sublaeve Rchb.f.	Synonym		WCSP
Oncidium crista-galli Rchb.f.	Synonym		WCSP
Oncidium cristatellum Garay	Accepted		WCSP
Oncidium cristatum (Lindl.) Beer	Synonym		WCSP
Oncidium cristatum Rolfe [Illegitimate]	Synonym		WCSP
Oncidium crocidipterum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium crocidipterum subsp. dormanianum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium crocodiliceps Rchb.f.	Synonym		WCSP
Oncidium croesus Rchb.f.	Accepted		WCSP
Oncidium cruciatum Rchb.f.	Accepted		WCSP
Oncidium cruciferum Rchb.f. & Warsz.	Accepted		WCSP
Oncidium cruentoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium cryptocopis Rchb.f.	Synonym		WCSP
Oncidium × cubense Moir	Synonym		TRO
Oncidium cucullatum Lindl.	Synonym		WCSP
Oncidium cucullatum var. andigenum Burb.	Synonym		WCSP
Oncidium cucullatum var. dayanum Rchb.f.	Synonym		WCSP
Oncidium cucullatum var. dolabratum Stacy	Synonym		WCSP
Oncidium cucullatum var. flavidum B.S.Williams	Synonym		WCSP
Oncidium cucullatum var. giganteum auct.	Synonym		WCSP
Oncidium cucullatum var. macrochilum Lindl.	Synonym		WCSP
Oncidium cucullatum var. maculosum Lindl.	Synonym		WCSP
Oncidium cucullatum var. nubigenum (Lindl.) Lindl.	Synonym		WCSP
Oncidium cucullatum var. phalaenopsis (Linden & Rchb.f.) G.Nicholson	Synonym		WCSP
Oncidium cucullatum var. sanguinolentum (Lindl.) Lindl.	Synonym		WCSP
Oncidium cucullatum var. spathulatum Lindl.	Synonym		WCSP
Oncidium cuculligerum (Schltr.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium cuencanum Rchb.f.	Synonym		WCSP
Oncidium culex Königer	Accepted		WCSP
Oncidium cultratum Lindl.	Accepted		WCSP
Oncidium culuenense (Docha Neto & Benelli) Königer	Accepted		WCSP
Oncidium cuneatum Scheidw. [Illegitimate]	Synonym		WCSP
Oncidium cuneatum Lindl.	Synonym		WCSP
Oncidium cuneilabium Moir	Synonym		WCSP
Oncidium curtum Lindl.	Synonym		WCSP
Oncidium curvipetalum (D.E. Benn. & Christenson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium cycnicolle Rchb.f. ex Kraenzl.	Synonym		WCSP
Oncidium cycnicolle Rchb. f.	Accepted		TRO
Oncidium dactyliferum Garay & Dunst.	Accepted		WCSP
Oncidium dactylopterum Rchb.f.	Accepted		WCSP
Oncidium damacenoi (Chiron & V.P.Castro) Königer	Accepted		WCSP
Oncidium dasyanthum Kraenzl.	Synonym		WCSP
Oncidium dasytyle Rchb.f.	Accepted		WCSP
Oncidium davisii Rchb.f.	Synonym		WCSP
Oncidium dayanum (Rchb.f.) Stacy	Synonym		WCSP
Oncidium decipiens Lindl. [Illegitimate]	Synonym		WCSP
Oncidium decorum Königer	Accepted		WCSP
Oncidium deltoideum Lindl.	Accepted		WCSP
Oncidium delumbe Lindl.	Synonym		WCSP
Oncidium densiflorum (Lindl.) Beer	Synonym		WCSP
Oncidium densiflorum (Lindl.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium dentatum Klotzsch	Synonym		WCSP
Oncidium depauperatum F.Lehm. & Kraenzl.	Synonym		WCSP
Oncidium desertorum Nash ex Withner	Synonym		WCSP
Oncidium desertorum var. alborubrum (Moir & A.D.Hawkes) Garay	Synonym		WCSP
Oncidium desertorum var. album (Moir & A.D.Hawkes) Garay	Synonym		WCSP
Oncidium desertorum var. aureorubrum Moir [Invalid]	Synonym		WCSP
Oncidium detortum Rchb.f.	Synonym		WCSP
Oncidium diadema Linden	Synonym		WCSP
Oncidium diaphanum Rchb.f.	Synonym		WCSP
Oncidium diceratum Lindl.	Synonym		WCSP
Oncidium dichromaticum Rchb.f.	Accepted		WCSP
Oncidium dichromum Rolfe	Synonym		WCSP
Oncidium dichroneura Rolfe	Synonym		WCSP
Oncidium × dicranophorum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium dielsianum Kraenzl.	Synonym		WCSP
Oncidium diffusum C.Schweinf.	Synonym		WCSP
Oncidium digitatum Lindl.	Synonym		WCSP
Oncidium digitoides M.W.Chase & N.H.Williams	Unresolved		WCSP (in review)
Oncidium dilatatum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium dimorphum Regel	Synonym		WCSP
Oncidium diodon Rchb.f.	Synonym		WCSP
Oncidium dipterum (Lindl.) Beer	Synonym		WCSP
Oncidium disciferum Lindl.	Accepted		WCSP
Oncidium discobulbon Kraenzl.	Accepted		WCSP
Oncidium distans (Rchb.f.) Beer	Synonym		WCSP
Oncidium divaricatum (Lindl.) Beer [Illegitimate]	Synonym		WCSP
Oncidium divaricatum Lindl.	Accepted		WCSP
Oncidium divaricatum var. cupreum Lindl.	Synonym		WCSP
Oncidium dodianum Ackerman & Chiron	Synonym		WCSP
Oncidium × domingense Moir [Unplaced]	Unresolved		WCSP
Oncidium donianum Bateman ex W.Baxter	Accepted		WCSP
Oncidium dracoceps (Dalström) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium drepanopterum Kraenzl.	Synonym		WCSP
Oncidium dubium André	Synonym		WCSP
Oncidium dulcineae (Pupulin & G.A. Rojas) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium dunstervilleorum Foldats	Synonym		WCSP
Oncidium durangense Hágsater	Synonym		WCSP
Oncidium × duveenii Fowlie	Synonym		WCSP
Oncidium ebrachiatum Ames & C.Schweinf.	Synonym		WCSP
Oncidium echinatum Kunth	Synonym		WCSP
Oncidium echinatum (Barb.Rodr.) Cogn. [Illegitimate]	Synonym		WCSP
Oncidium echinatum var. backhousianum Rchb.f.	Synonym		WCSP
Oncidium echinatum var. brunleesianum (Rchb.f.) Cogn.	Synonym		WCSP
Oncidium echinophorum Barb.Rodr.	Synonym		WCSP
Oncidium echinops Königer	Accepted		WCSP
Oncidium edmundoi Pabst	Accepted		WCSP
Oncidium edwallii Cogn.	Accepted		WCSP
Oncidium egertonii (Lindl.) Beer	Synonym		WCSP
Oncidium ehrenbergii (Link, Klotzsch & Otto) Beer	Synonym		WCSP
Oncidium elegans (Ham.) Beer	Synonym		WCSP
Oncidium × elegans (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium elegantissimum Rchb.f.	Synonym		WCSP
Oncidium elegantulum Rchb. f.	Synonym		TRO
Oncidium elephantotis Rchb.f.	Synonym		WCSP
Oncidium eliae (Rolfe) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium emarginatum G.Mey.	Synonym		WCSP
Oncidium emilii Schltr.	Accepted		WCSP
Oncidium enderianum auct.	Synonym		WCSP
Oncidium endocharis Rchb.f.	Accepted		WCSP
Oncidium engelii Rchb.f.	Synonym		WCSP
Oncidium englerianum Kraenzl.	Synonym		WCSP
Oncidium ensatum Lindl.	Accepted		WCSP
Oncidium epidendroides (Kunth) Beer	Synonym		WCSP
Oncidium erosilabium Stacy	Synonym		WCSP
Oncidium erosum (A.Rich. & Galeotti) Beer	Synonym		WCSP
Oncidium erucatum Königer	Synonym		WCSP
Oncidium estradae Dodson	Accepted		WCSP
Oncidium euodes (Rchb.f.) Rchb.f.	Synonym		WCSP
Oncidium eurycline Rchb.f.	Synonym		WCSP
Oncidium euxanthinum Rchb.f.	Synonym		WCSP
Oncidium exalatum Hágsater	Accepted		WCSP
Oncidium examinans Lindl.	Synonym		WCSP
Oncidium exasperatoides D.E.Benn. & Christenson	Accepted		WCSP
Oncidium exasperatum Linden & Rchb.f.	Synonym		WCSP
Oncidium exauriculatum (Hamer & Garay) R.Jiménez	Synonym		WCSP
Oncidium excavatum Lindl.	Accepted		WCSP
Oncidium excavatum var. aurosum (Rchb.f. & Warsz.) Lindl.	Synonym		WCSP
Oncidium excavatum var. dawsonii B.S.Williams	Synonym		WCSP
Oncidium excellens (Rchb. f.) M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium falcicorne Kraenzl.	Synonym		WCSP
Oncidium falciferum Rchb. f. & Warsz.	Unresolved		TRO
Oncidium falcipetalum Lindl.	Synonym		WCSP
Oncidium falcipetalum var. pavonii Rchb. f. ex Lindl.	Synonym		TRO
Oncidium fallens Rchb.f.	Synonym		WCSP
Oncidium fasciculatum Hágsater	Accepted		WCSP
Oncidium fasciferum Rchb.f. & Warsz.	Accepted		WCSP
Oncidium festatum Rchb. ex Warsz.	Synonym		WCSP
Oncidium festatum Rchb. f. & Warsz.	Synonym		TRO
Oncidium filipes (Lindl.) Lindl.	Synonym		WCSP
Oncidium fimbriatum Hoffmanns. [Illegitimate]	Synonym		WCSP
Oncidium fimbriatum Lindl.	Accepted		WCSP
Oncidium flabelliferum Pinel	Synonym		WCSP
Oncidium flabellulatum Rchb. f. & L. Linden	Unresolved		TRO
Oncidium flavescens (Lindl.) Rchb.f.	Synonym		WCSP
Oncidium flavescens var. stellatum (Lindl.) Rchb.f.	Synonym		WCSP
Oncidium flavobrunneum (Senghas) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium flavovirens L.O.Williams	Synonym		WCSP
Oncidium fleckiorum Königer	Accepted		WCSP
Oncidium flexuosum (Kunth) Lindl. [Illegitimate]	Synonym		WCSP
Oncidium flexuosum Lodd.	Accepted		WCSP
Oncidium flexuosum var. radiatum Rchb.f.	Synonym		WCSP
Oncidium floribundum Rchb.f. ex Kraenzl.	Synonym		WCSP
Oncidium floridanum Ames	Synonym		WCSP
Oncidium × floride-phillipsae Moir & A.D.Hawkes [Unplaced]	Unresolved		WCSP
Oncidium floryi (Rolfe) M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium forbesii Hook.	Accepted		WCSP
Oncidium forbesio-dasystele Rolfe	Unresolved		TRO
Oncidium forcipatum (Linden & Rchb.f.) Schnee	Synonym		WCSP
Oncidium forcipetalum (Lindl. ex Rchb. f.) Schnee	Unresolved		TRO
Oncidium forkelii Scheidw.	Synonym		WCSP
Oncidium formosissimum Rchb.f.	Synonym		WCSP
Oncidium foveatum Lindl.	Synonym		WCSP
Oncidium fractiflexum F.Lehm. & Kraenzl.	Synonym		WCSP
Oncidium fragae Königer	Synonym		WCSP
Oncidium fuchsii Königer	Accepted		WCSP
Oncidium fulgens Schltr.	Synonym		WCSP
Oncidium funckii Lubbers	Synonym		WCSP
Oncidium funereum Lex.	Synonym		WCSP
Oncidium funereum Lindl. [Illegitimate]	Synonym		WCSP
Oncidium funis F.Lehm. & Kraenzl.	Synonym		WCSP
Oncidium furcyense Moir	Synonym		WCSP
Oncidium fuscans Rchb.f.	Accepted		WCSP
Oncidium fuscatum Rchb.f.	Accepted		WCSP
Oncidium fuscopetalum (Hoehne) Garay & Stacy	Accepted		WCSP
Oncidium gaertneri Beer ex Lindl.	Unresolved		TRO
Oncidium galeatum Scheidw.	Synonym		WCSP
Oncidium galeottianum (A.Rich.) Beer [Illegitimate]	Synonym		WCSP
Oncidium galeottianum Drapiez	Synonym		WCSP
Oncidium galianoi (Dalström & P.Nuñez) M.W.Chase & N.H.Williams	Unresolved		WCSP (in review)
Oncidium gallopavinum C.Morren	Synonym		WCSP
Oncidium gardneri Lindl.	Accepted		WCSP
Oncidium gardneri subsp. caloglossum (Rchb.f.) Fowlie	Synonym		WCSP
Oncidium gardneri var. elegantissimum (Rchb.f.) Cogn.	Synonym		WCSP
Oncidium gardneri var. pollettianum (Rchb.f.) Cogn.	Synonym		WCSP
Oncidium gardneri var. praestans (Rchb.f.) Cogn.	Synonym		WCSP
Oncidium gardnerianum auct. [Spelling variant]	Synonym		WCSP
Oncidium × gardstyle Braem & Campacci	Accepted		WCSP
Oncidium gargantua Rchb.f.	Synonym		WCSP
Oncidium gauntlettii Withner & H.P.Jesup	Synonym		WCSP
Oncidium gautieri Regel	Synonym		WCSP
Oncidium geertianum C.Morren	Accepted		WCSP
Oncidium geniculatum Dodson	Unresolved		TRO
Oncidium gentryi (Dodson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium geraense Barb.Rodr.	Synonym		WCSP
Oncidium ghiesbreghtianum A.Rich. & Galeotti	Synonym		WCSP
Oncidium ghillanyi Pabst	Synonym		WCSP
Oncidium gilvum (Vell.) Pabst	Accepted		WCSP
Oncidium gireaudianum (Rchb.f. & Warsz.) Rchb.f.	Synonym		WCSP
Oncidium glaziovii Cogn.	Synonym		WCSP
Oncidium globuliferum Kunth	Synonym		WCSP
Oncidium globuliferum var. costaricense Rchb.f.	Synonym		WCSP
Oncidium gloriosum (Linden & Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium glossomystax Rchb.f.	Synonym		WCSP
Oncidium glumaceum (Lindl.) Rchb.f.	Synonym		WCSP
Oncidium gnomus Kraenzl.	Synonym		WCSP
Oncidium godseffianum Kraenzl.	Synonym		WCSP
Oncidium × godseffianum (Rolfe) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium gomesii Cogn.	Synonym		WCSP
Oncidium gracile (Lindl.) Beer [Illegitimate]	Synonym		WCSP
Oncidium gracile Lindl.	Accepted		WCSP
Oncidium graciliforme C.Schweinf.	Accepted		WCSP
Oncidium gracillimum Rolfe	Synonym		WCSP
Oncidium gracillimum Cogn. [Illegitimate]	Synonym		WCSP
Oncidium gramazuense (D.E. Benn. & Christenson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium gramineum (Poepp. & Endl.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium graminifolium (Lindl.) Lindl.	Accepted		WCSP
Oncidium graminifolium var. filipes (Lindl.) Lindl.	Synonym		WCSP
Oncidium graminifolium var. holochilum Lindl.	Synonym		WCSP
Oncidium graminifolium var. wrayae (Hook.) Lindl.	Synonym		WCSP
Oncidium grandiflorum Rchb.f.	Synonym		WCSP
Oncidium gravesianum Rolfe	Accepted		WCSP
Oncidium guatemalenoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium guatemalense Schltr.	Synonym		WCSP
Oncidium guianense (Aubl.) Garay	Synonym		WCSP
Oncidium guianense subsp. alborubrum (Moir & A.D.Hawkes) Withner	Synonym		WCSP
Oncidium guianense var. alborubrum (Moir & A.D.Hawkes) K.S.Wilson	Synonym		WCSP
Oncidium guianense var. album (Moir & A.D.Hawkes) K.S.Wilson	Synonym		WCSP
Oncidium guianense f. album (Moir & A.D.Hawkes) Withner	Synonym		WCSP
Oncidium guianense var. aureorubrum (Moir) K.S.Wilson	Synonym		WCSP
Oncidium guianense f. aureorubrum (Moir) Withner	Synonym		WCSP
Oncidium guibertianum A.Rich.	Synonym		WCSP
Oncidium gundlachii C.Wright ex Griseb.	Synonym		WCSP
Oncidium gutfreundianum Chiron & V.P.Castro	Accepted		WCSP
Oncidium guttatum (L.) Rchb.f.	Synonym		WCSP
Oncidium guttatum var. auriculatum Cogn.	Synonym		WCSP
Oncidium guttatum var. dodgsonii Cogn.	Synonym		WCSP
Oncidium guttatum var. intermedium (Knowles & Westc.) Rchb.f.	Synonym		WCSP
Oncidium guttatum var. morrenii (Lindl.) Rchb. f.	Synonym		TRO
Oncidium guttatum var. roseum Lindl.	Synonym		WCSP
Oncidium guttulatum Rchb.f. ex Lindl.	Synonym		WCSP
Oncidium gyriferum Rchb.f.	Synonym		WCSP
Oncidium gyrobulbon Rchb.f.	Synonym		WCSP
Oncidium haematochilum Lindl. & Paxton	Synonym		WCSP
Oncidium haematochrysum Rchb.f.	Synonym		WCSP
Oncidium haematoxanthum Rchb.f. ex Lindl.	Synonym		WCSP
Oncidium hagsaterianum R.Jiménez & Soto Arenas	Synonym		WCSP
Oncidium haitiense Leonard & Ames	Synonym		WCSP
Oncidium hallii (Lindl.) Beer	Synonym		WCSP
Oncidium halteratum Lindl.	Synonym		WCSP
Oncidium halteratum var. fuscum Lindl.	Synonym		WCSP
Oncidium halteratum var. luteum Lindl.	Synonym		WCSP
Oncidium hannelorae Nir	Synonym		WCSP
Oncidium hapalotyle Schltr.	Accepted		WCSP
Oncidium harlingii Stacy	Synonym		WCSP
Oncidium harrisoniae Lodd.	Unresolved		TRO
Oncidium harrisonianum Lindl.	Synonym		WCSP
Oncidium harrisonianum var. pallidum Rchb.f.	Synonym		WCSP
Oncidium harryanum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium hartii Moir	Synonym		WCSP
Oncidium hartwegii Lindl.	Synonym		WCSP
Oncidium hartwegii var. parviflorum Rchb.f.	Synonym		WCSP
Oncidium hassleri Cogn.	Synonym		WCSP
Oncidium hastatum (Bateman) Lindl.	Accepted		WCSP
Oncidium hastatum Mansf.	Unresolved		TRO
Oncidium hastatum var. atratum Lindl.	Synonym		WCSP
Oncidium hastatum var. flavescens Lindl.	Synonym		WCSP
Oncidium hastatum var. hemimelaenum Rchb.f.	Synonym		WCSP
Oncidium hastatum var. roezlii Rchb.f.	Synonym		WCSP
Oncidium hastiferum Rchb.f. & Warsz.	Synonym		WCSP
Oncidium hastilabium (Lindl.) Beer	Accepted		WCSP
Oncidium hastilabium (Lindl.) Garay & Dunst.	Synonym		TRO
Oncidium hatschbachii Schltr.	Synonym		WCSP
Oncidium hauensteinii (Königer) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium hawkesianum Moir	Synonym		WCSP
Oncidium hebraicum Rchb.f.	Synonym		WCSP
Oncidium hecatanthum Kraenzl.	Synonym		WCSP
Oncidium hedyosmum Schltr.	Synonym		WCSP
Oncidium heinzelii Königer	Accepted		WCSP
Oncidium helenae Rchb.f.	Synonym		WCSP
Oncidium helgae Königer	Synonym		WCSP
Oncidium helgae (Königer) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium helicanthum Kraenzl.	Synonym		WCSP
Oncidium hemichrysum (Rchb.f. & Warsz.) Rchb.f.	Synonym		WCSP
Oncidium henchmannii (Knowles & Westc.) Henshall	Synonym		WCSP
Oncidium henchmannii Lodd. ex Lindl.	Synonym		TRO
Oncidium henchmannii (Knowles & Westc.) Lodd.	Synonym		TRO
Oncidium henekenii M.R.Schomb. ex Lindl.	Synonym		WCSP
Oncidium hennisii (Rolfe) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium henrici-gustavi Kraenzl.	Synonym		WCSP
Oncidium herbaceum (Lindl.) Rchb.f.	Synonym		WCSP
Oncidium hermansianum (Königer) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium hernandezii Königer	Accepted		WCSP
Oncidium herzogii Schltr.	Accepted		WCSP
Oncidium heteranthum Poepp. & Endl.	Accepted		WCSP
Oncidium heterodactylum Kraenzl.	Accepted		WCSP
Oncidium heterosepalum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium hians Lindl.	Accepted		WCSP
Oncidium hieroglyphicum Rchb.f. & Warsz.	Accepted		WCSP
Oncidium × hinnus (Rchb.f.) M.W.Chase & N.H.Williams	Unresolved		WCSP (in review)
Oncidium hintonii L.O.Williams	Accepted		WCSP
Oncidium hirtzii Dodson	Synonym		WCSP
Oncidium hirtzoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium hirundo Rchb.f.	Synonym		WCSP
Oncidium hoeheanum Schltr. ex Mansf.	Unresolved		TRO
Oncidium holochrysum Rchb.f.	Synonym		WCSP
Oncidium hondurense Ames	Synonym		WCSP
Oncidium hookeri Rolfe	Accepted		WCSP
Oncidium hookeri var. albescens Pabst	Synonym		WCSP
Oncidium hookeri f. albescens (Pabst) F.Barros & J.A.N.Bat.	Synonym		WCSP
Oncidium hoppii Schltr.	Synonym		WCSP
Oncidium hrubyanum Rchb.f.	Synonym		WCSP
Oncidium hrubyatoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium huebneri (Mansf.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium huebschii Rchb.f.	Synonym		WCSP
Oncidium humboldtii Schltr.	Synonym		WCSP
Oncidium huntianum Hook.	Synonym		WCSP
Oncidium huntleyanum Beer ex Lindl.	Synonym		WCSP
Oncidium hyalinobulbon Lex.	Synonym		WCSP
Oncidium hydrophilum Barb.Rodr.	Accepted		WCSP
Oncidium hydrophilum var. immaculatum L.C.Menezes	Synonym		WCSP
Oncidium hydrophilum f. immaculatum (L.C.Menezes) Christenson	Synonym		WCSP
Oncidium hymenanthum (Schltr.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium hyphaematicum Rchb.f.	Accepted		WCSP
Oncidium ibis (Schltr.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium imbricatum (Lindl.) Rchb.f.	Synonym		WCSP
Oncidium imitans Dressler	Accepted		WCSP
Oncidium imperatoris-maximiliani Rchb.f.	Synonym		WCSP
Oncidium incarum (Kraenzl.) C.Schweinf.	Synonym		WCSP
Oncidium incurvum Barker ex Lindl.	Accepted		WCSP
Oncidium incurvum var. album Linden	Synonym		WCSP
Oncidium incurvum f. album (Linden) Christenson	Synonym		WCSP
Oncidium inferlobum auct.	Synonym		WCSP
Oncidium × inopinatum Christenson	Accepted		WCSP
Oncidium inops Cogn. & Rolfe	Synonym		WCSP
Oncidium inouei T.Hashim.	Accepted		WCSP
Oncidium insculptum Rchb.f.	Synonym		WCSP
Oncidium insigne (Rolfe) Christenson	Accepted		WCSP
Oncidium insleayi Baker ex Lindl.	Synonym		WCSP
Oncidium integrilabris (Pupulin) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium intermedium Knowles & Westc. [Illegitimate]	Synonym		WCSP
Oncidium intermedium Bertero ex Spreng.	Synonym		WCSP
Oncidium intermedium var. alborubrum Moir & A.D.Hawkes	Synonym		WCSP
Oncidium intermedium var. album Moir & A.D.Hawkes	Synonym		WCSP
Oncidium ionodon Rchb.f.	Synonym		WCSP
Oncidium ionops Cogn. & Rolfe	Synonym		TRO
Oncidium ionopterum Rchb.f.	Accepted		WCSP
Oncidium ionosmum Lindl.	Synonym		WCSP
Oncidium iricolor Rchb.f.	Accepted		WCSP
Oncidium iridifolium Lindl. [Illegitimate]	Synonym		WCSP
Oncidium iridifolium Kunth	Synonym		WCSP
Oncidium isidrense Chiron	Synonym		WCSP
Oncidium isopterum Lindl.	Accepted		WCSP
Oncidium isthmi Schltr.	Accepted		WCSP
Oncidium itapetingense V.P.Castro & Chiron	Accepted		WCSP
Oncidium ixioides (Lindl.) Beer	Synonym		WCSP
Oncidium jacquinianum Garay & Stacy	Synonym		WCSP
Oncidium jamaicense Moir & A.D.Hawkes	Synonym		WCSP
Oncidium jamesonii Rchb. f.	Synonym		TRO
Oncidium jamiesonii Lindl.	Synonym		WCSP
Oncidium janeirense Rchb.f.	Synonym		WCSP
Oncidium jarmilae Königer	Accepted		WCSP
Oncidium jimenezii Moir	Synonym		TRO
Oncidium johannis Schltr.	Synonym		WCSP
Oncidium johnianum Schltr.	Synonym		WCSP
Oncidium johnii Oppenheim	Synonym		WCSP
Oncidium jonesianum Rchb.f.	Synonym		WCSP
Oncidium jonesianum var. binotii Pabst	Synonym		WCSP
Oncidium josstianum (Rchb.f.) Rchb.f.	Synonym		WCSP
Oncidium juncifolium (L.) Lindl.	Synonym		WCSP
Oncidium juninense (Schltr.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium jurgensenianum (Lem.) Lem.	Synonym		WCSP
Oncidium jurgenzenianum Lem.	Unresolved		TRO
Oncidium kalbreyerianum Kraenzl.	Synonym		WCSP
Oncidium kappleri Rchb.f. ex Lindl.	Synonym		WCSP
Oncidium karwinskii (Lindl.) Lindl.	Accepted		WCSP
Oncidium karwinskii (Lindl.) Dressler & N.H. Williams	Synonym		TRO
Oncidium kautskyi Pabst	Accepted		WCSP
Oncidium kautzkyi Pabst	Unresolved		TRO
Oncidium kegeljani (Morren) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium keilianum (Rchb.f. ex Lindl.) Rchb.f.	Synonym		WCSP
Oncidium kennedyi Stacy	Synonym		WCSP
Oncidium kienastianum Rchb.f.	Synonym		WCSP
Oncidium klotzschianum Rchb.f.	Synonym		WCSP
Oncidium koenigeri M.W.Chase & N.H.Williams	Unresolved		WCSP (in review)
Oncidium kraenzlinianum Cogn.	Accepted		WCSP
Oncidium × kraenzlinii (O'Brien) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium kramerianum Rchb.f.	Synonym		WCSP
Oncidium kramerianum var. resplendens Rchb. f.	Synonym		TRO
Oncidium kymatoides Kraenzl.	Synonym		WCSP
Oncidium labiatum (Sw.) Rchb.f.	Synonym		WCSP
Oncidium lacerum Lindl.	Synonym		WCSP
Oncidium laeve (Lindl.) Beer	Accepted		WCSP
Oncidium lamelligerum Rchb.f.	Synonym		WCSP
Oncidium lanceanum Lindl.	Synonym		WCSP
Oncidium lanceanum f. aureum Christenson	Synonym		WCSP
Oncidium lancifolium Lindl.	Accepted		WCSP
Oncidium lankesteri Ames	Synonym		WCSP
Oncidium lansbergii Rchb.f.	Synonym		WCSP
Oncidium larkianum Gower	Unresolved		TRO
Oncidium larkinianum Gower	Synonym		WCSP
Oncidium lawrenceanum (Lindl.) Rchb.f.	Synonym		WCSP
Oncidium leeanum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium lehmannianum (Kraenzl.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium lehmannii (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium leiboldii Rchb.f.	Synonym		WCSP
Oncidium leiboldii var. album Moir & A.D.Hawkes	Synonym		WCSP
Oncidium leiboldii var. majus Moir & A.D.Hawkes	Synonym		WCSP
Oncidium leinigii Pabst	Accepted		WCSP
Oncidium leleui R.Jiménez & Soto Arenas	Accepted		WCSP
Oncidium lemonianum Lindl.	Synonym		WCSP
Oncidium lentiginosum Rchb.f.	Accepted		WCSP
Oncidium leochiloides Foldats	Synonym		WCSP
Oncidium leopardinum Lindl.	Accepted		WCSP
Oncidium leopoldianum Rolfe	Synonym		WCSP
Oncidium leopoldii God.-Leb. [Spelling variant]	Synonym		WCSP
Oncidium lepidum Linden & Rchb.f.	Accepted		WCSP
Oncidium lepturum Rchb.f.	Accepted		WCSP
Oncidium leucochilum Bateman ex Lindl.	Accepted		WCSP
Oncidium leucochilum var. dawsonianum F. Rchb.	Synonym		TRO
Oncidium leucochilum var. digitatum (Lindl.) Lindl.	Synonym		WCSP
Oncidium leucochilum f. speciosum Regel	Synonym		WCSP
Oncidium leucomelas (Rchb.f.) Dressler & N.H.Williams	Accepted		WCSP
Oncidium leucostomum Hoffmanns. ex Lindl.	Synonym		WCSP
Oncidium leucostomum Hoffmanns.	Synonym		TRO
Oncidium leucotis Rchb.f.	Synonym		WCSP
Oncidium liebmannii Rchb.f. ex Kraenzl.	Synonym		WCSP
Oncidium lietzei Regel	Accepted		WCSP
Oncidium lietzei var. aureomaculatum Regel	Synonym		WCSP
Oncidium lietzei var. bicolor Regel	Synonym		WCSP
Oncidium ligiae Königer	Accepted		WCSP
Oncidium ligiae (Königer & R.Escobar) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium ligulatum Mansf.	Unresolved		TRO
Oncidium limbatum (Rchb. f.) M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium limminghei E.Morren ex Lindl.	Synonym		WCSP
Oncidium lindenii Brongn.	Synonym		WCSP
Oncidium lindenii hort. ex Rchb. f.	Synonym		TRO
Oncidium lindenii Lodd. ex Lindl.	Synonym		TRO
Oncidium lindleyanum L. Linden	Unresolved		TRO
Oncidium lindleyi (Galeotti ex Lindl.) R.Jiménez & Soto Arenas	Synonym		WCSP
Oncidium lindleyoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium lineoligerum Rchb.f. & Warsz.	Accepted		WCSP
Oncidium linguiforme Lindl.	Synonym		WCSP
Oncidium lintriculus Kraenzl.	Synonym		WCSP
Oncidium × litum Rchb.f.	Accepted		WCSP
Oncidium llanachagaense (D.E. Benn. & Christenson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium loefgrenii Cogn.	Accepted		WCSP
Oncidium longicornu Mutel	Accepted		WCSP
Oncidium longicornu var. gautieri (Regel) Cogn.	Synonym		WCSP
Oncidium longicornu var. grossmannii Dammer	Synonym		WCSP
Oncidium longicuspe (Rchb.f.) Rchb.f.	Synonym		WCSP
Oncidium longicuspis (Rchb. f.) Rchb. f.	Synonym		TRO
Oncidium longifolium Lindl.	Synonym		WCSP
Oncidium longipes Lindl.	Accepted		WCSP
Oncidium longipes var. croesus (Rchb.f.) A.H.Kent	Synonym		WCSP
Oncidium longipes var. monophyllum Regel	Synonym		WCSP
Oncidium lowii Rolfe	Synonym		WCSP
Oncidium loxense Lindl.	Synonym		WCSP
Oncidium lucasianum Rolfe	Accepted		WCSP
Oncidium lucayanum Nash	Synonym		WCSP
Oncidium lucayanum var. aureum Moir	Synonym		WCSP
Oncidium lucayanum var. purpureum Moir	Synonym		WCSP
Oncidium lucayanum var. rubiginosum Moir	Synonym		WCSP
Oncidium lucescens Rchb.f.	Synonym		WCSP
Oncidium lucianianum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium ludens Rchb.f.	Synonym		WCSP
Oncidium lueri Dodson	Unresolved		TRO
Oncidium lueroroides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium luerorum Dodson	Synonym		WCSP
Oncidium lunaeanum auct.	Synonym		WCSP
Oncidium lunatum Lindl.	Synonym		WCSP
Oncidium luridum Lindl.	Synonym		WCSP
Oncidium luridum var. atratum Lindl.	Synonym		WCSP
Oncidium luridum var. guttatum (L.) Lindl.	Synonym		WCSP
Oncidium luridum var. henchmannii Knowles & Westc.	Synonym		WCSP
Oncidium luridum var. intermedium (Knowles & Westc.) Lindl.	Synonym		WCSP
Oncidium luridum var. morrenii Lindl.	Synonym		WCSP
Oncidium luteopurpureum (Lindl.) Beer	Synonym		WCSP
Oncidium luteum Rolfe	Accepted		WCSP
Oncidium lutzii (Königer) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium lykaiosii R.Vásquez & Dodson	Accepted		WCSP
Oncidium lyratum Withner	Synonym		WCSP
Oncidium macasense Dodson	Synonym		WCSP
Oncidium machupicchuense (D.E. Benn. & Christenson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium macrantherum Hook.	Synonym		WCSP
Oncidium macranthum Lindl.	Synonym		WCSP
Oncidium macranthum var. hastiferum (Rchb.f. & Warsz.) C.Schweinf.	Synonym		WCSP
Oncidium macrobulbon (Kraenzl.) M.W. Chase & Williams, N.	Synonym		TRO
Oncidium macronyx Rchb.f.	Synonym		WCSP
Oncidium macropetalum Lindl.	Accepted		WCSP
Oncidium macropetalum Klotzsch [Illegitimate]	Synonym		WCSP
Oncidium macropetalum var. chrysopterum Lindl.	Synonym		WCSP
Oncidium macropetalum var. fuscopetalum Hoehne	Synonym		WCSP
Oncidium macropetalum var. micranthum Pabst	Synonym		WCSP
Oncidium macropterum A.Rich. & Galeotti	Synonym		WCSP
Oncidium macropus Linden & Rchb.f.	Synonym		WCSP
Oncidium macrorhynchum Kraenzl.	Synonym		WCSP
Oncidium macrotyle Königer & J.Portilla	Synonym		WCSP
Oncidium macrum (Lindl.) Beer	Synonym		WCSP
Oncidium maculatum (Aubl.) Urb. [Illegitimate]	Synonym		WCSP
Oncidium maculatum (Lex.) Beer [Illegitimate]	Synonym		WCSP
Oncidium maculatum (Lindl.) Lindl.	Accepted		WCSP
Oncidium maculatum var. donianum Rchb.f.	Synonym		WCSP
Oncidium maculatum var. herbaceum Lindl.	Synonym		WCSP
Oncidium maculatum var. lindleyi Galeotti ex Lindl.	Synonym		WCSP
Oncidium maculatum var. parviflorum (Lindl.) Lindl.	Synonym		WCSP
Oncidium maculatum var. psittacinum Rchb.f. ex Lindl.	Synonym		WCSP
Oncidium maculatum var. russellianum Lindl.	Synonym		WCSP
Oncidium maculatum var. vinosum Lindl.	Synonym		WCSP
Oncidium maculosum Lindl.	Synonym		WCSP
Oncidium maderoi Schltr.	Synonym		WCSP
Oncidium maduroi Dressler	Accepted		WCSP
Oncidium magdalenae Rchb.f.	Accepted		WCSP
Oncidium magnificum Senghas	Accepted		WCSP
Oncidium maizifolium Lindl.	Accepted		WCSP
Oncidium majevskyi Toscano & V.P.Castro	Accepted		WCSP
Oncidium malleiferum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium mandibulare Linden & Rchb.f.	Synonym		WCSP
Oncidium mandonii Rchb.f.	Synonym		WCSP
Oncidium manningianum Königer	Accepted		WCSP
Oncidium mantense Dodson & R.Estrada	Accepted		WCSP
Oncidium mantinii God.-Leb.	Synonym		WCSP
Oncidium manuelariasii M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium margalefii Hágsater	Synonym		WCSP
Oncidium marginatum Königer [Unplaced]	Unresolved		WCSP
Oncidium marinii (Königer) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium × marriottianum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium marshallianum Rchb.f.	Accepted		WCSP
Oncidium martianum Lindl.	Accepted		WCSP
Oncidium martinezii Königer	Accepted		WCSP
Oncidium massangei E.Morren	Accepted		WCSP
Oncidium mathieuanum Rchb.f. & Warsz.	Accepted		WCSP
Oncidium mathiewanum Rchb. f. & Warsz.	Accepted		TRO
Oncidium maxillare (Lindl.) Beer	Synonym		WCSP
Oncidium maxilligerum Lem.	Synonym		WCSP
Oncidium mazzinii Hoehne	Synonym		WCSP
Oncidium megalophium (Lindl.) Beer	Synonym		WCSP
Oncidium megalopterum Kraenzl.	Synonym		WCSP
Oncidium megalous Schltr.	Synonym		WCSP
Oncidium meirax Rchb.f.	Synonym		WCSP
Oncidium melanops Rchb.f.	Synonym		WCSP
Oncidium meliosmum Rchb.f.	Synonym		WCSP
Oncidium mellifluum Kraenzl.	Synonym		WCSP
Oncidium membranaceum (Lindl.) Beer	Synonym		WCSP
Oncidium mendax Rchb.f.	Synonym		WCSP
Oncidium mentigerum (Rchb.f. & Warsz.) Lindl.	Synonym		WCSP
Oncidium metallicum Rchb.f.	Synonym		WCSP
Oncidium methonica Rchb.f.	Synonym		WCSP
Oncidium mexicanum (L.O. Williams) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium micklowii (Dalström) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium microcachrys Rchb.f. ex Kraenzl.	Synonym		WCSP
Oncidium microchilum Bateman ex Lindl.	Synonym		WCSP
Oncidium microglossum Klotzsch	Synonym		WCSP
Oncidium microphyton Kraenzl.	Synonym		WCSP
Oncidium micropogon Rchb.f.	Accepted		WCSP
Oncidium micropogon var. bahiense Cogn.	Synonym		WCSP
Oncidium micropogon var. chrysopterum Rchb.f.	Synonym		WCSP
Oncidium microstigma Rchb.f.	Accepted		WCSP
Oncidium microxiphium Rchb.f.	Synonym		WCSP
Oncidium millei Schltr.	Synonym		WCSP
Oncidium millianum Rchb.f.	Accepted		WCSP
Oncidium mimeticum Stacy	Synonym		WCSP
Oncidium mimeticum var. flavidum (B.S.Williams) Stacy	Synonym		WCSP
Oncidium minax Rchb.f.	Synonym		WCSP
Oncidium minaxoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium miniatum (L. Linden) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium minutiflorum Schltr.	Synonym		WCSP
Oncidium mirabile Rchb.f.	Synonym		WCSP
Oncidium miradorense D.E.Benn. & Christenson	Synonym		WCSP
Oncidium mirandoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium mirandum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium miserrimum Rchb.f.	Synonym		WCSP
Oncidium mixtum Schltr.	Synonym		WCSP
Oncidium mixturum (Dalström & Sönnemark) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium moirianum Osment	Synonym		WCSP
Oncidium monachicum Rchb.f.	Synonym		WCSP
Oncidium × monacranthum Andreetta ex Dodson	Synonym		WCSP
Oncidium monoceras Hook.	Synonym		WCSP
Oncidium monophyllum (Regel) Herter	Synonym		WCSP
Oncidium montanum Barb.Rodr.	Accepted		WCSP
Oncidium morenoi Dodson & Luer	Synonym		WCSP
Oncidium morganii (Dodson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium multiflorum Soysa	Synonym		WCSP
Oncidium multistellare (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium × mulus (Rchb.f.) M.W.Chase & N.H.Williams	Unresolved		WCSP (in review)
Oncidium murinum Rchb.f.	Synonym		WCSP
Oncidium × murrellianum (Rchb.f.) M.W.Chase & N.H.Williams	Unresolved		WCSP (in review)
Oncidium mystacinum (Lindl.) Beer	Synonym		WCSP
Oncidium naevium (Lindl.) Beer	Synonym		WCSP
Oncidium nanum Lindl.	Synonym		WCSP
Oncidium naranjense Schltr.	Synonym		WCSP
Oncidium nebulosum Lindl.	Accepted		WCSP
Oncidium nevadense (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium niesseniae Königer	Accepted		WCSP
Oncidium nigratum Lindl. & Paxton	Accepted		WCSP
Oncidium nitidum Barb.Rodr.	Accepted		WCSP
Oncidium nobile (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium nodosum E.Morren	Synonym		WCSP
Oncidium noezlianum (Mast. ex L. Linden) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium normanii Pritz.	Synonym		WCSP
Oncidium nubigenum Lindl.	Synonym		WCSP
Oncidium nudum Bateman ex Lindl.	Synonym		WCSP
Oncidium oberonia Schltr.	Synonym		WCSP
Oncidium oblongatum Lindl.	Accepted		WCSP
Oncidium obovatum C.Presl	Synonym		WCSP
Oncidium obryzatoides Kraenzl.	Accepted		WCSP
Oncidium obryzatum Rchb.f. & Warsz.	Accepted		WCSP
Oncidium obryzatum var. dasystalix Rchb.f.	Synonym		WCSP
Oncidium obsoletum Galeotti ex Lindl.	Synonym		WCSP
Oncidium obstipum Königer & Posada	Unresolved		WCSP (in review)
Oncidium ocanense (Lindl.) Rchb.f.	Synonym		WCSP
Oncidium ochmatochilum Rchb.f.	Synonym		WCSP
Oncidium ochthodes Rchb.f.	Synonym		WCSP
Oncidium ochtodes Rchb. f.	Accepted		TRO
Oncidium odontochilum Barb.Rodr.	Synonym		WCSP
Oncidium odontopterygium Rchb.f. ex Kraenzl.	Synonym		WCSP
Oncidium odoratum (Lindl.) Beer	Synonym		WCSP
Oncidium oerstedii Rchb.f.	Synonym		WCSP
Oncidium oerstedii var. crispiflorum Schltr.	Synonym		WCSP
Oncidium oestlundianum L.O.Williams	Synonym		WCSP
Oncidium oliganthum (Rchb.f.) L.O.Williams ex Correll	Accepted		WCSP
Oncidium olivaceum Kunth	Synonym		WCSP
Oncidium olivaceum var. flavidum Lindl.	Synonym		WCSP
Oncidium olivaceum var. giganteum (auct.) Stacy	Synonym		WCSP
Oncidium olivaceum var. lawrenceanum Rob.	Synonym		WCSP
Oncidium olivaceum var. macrochilum (Lindl.) Sander	Synonym		TRO
Oncidium olivaceum var. nubigenum (Lindl.) Sander	Synonym		WCSP
Oncidium olivaceum var. phalaenopsis (Linden & Rchb.f.) Sander	Synonym		WCSP
Oncidium olivaceum var. sanguinolentum (Lindl.) Sander	Synonym		WCSP
Oncidium oloricolle Rchb.f.	Synonym		WCSP
Oncidium onustum Lindl.	Synonym		WCSP
Oncidium orbatum Kraenzl.	Accepted		WCSP
Oncidium orgyale Rchb.f. & Warsz.	Synonym		WCSP
Oncidium ornithocephaloides Kraenzl.	Synonym		WCSP
Oncidium ornithocephalum Lindl.	Accepted		WCSP
Oncidium ornithopodum Rchb.f.	Accepted		WCSP
Oncidium ornithorhynchum Kunth	Accepted		WCSP
Oncidium ornithorhynchum var. albiflorum Rchb.f.	Unresolved		WCSP
Oncidium ornithorhynchum f. albiflorum (Rchb.f.) O.Gruss & M.Wolff	Unresolved		WCSP
Oncidium orthostates Ridl.	Synonym		WCSP
Oncidium orthostatoides D.E.Benn. & Christenson	Accepted		WCSP
Oncidium orthotis Rchb.f.	Accepted		WCSP
Oncidium osmentii Withner	Synonym		WCSP
Oncidium osmentii Moir	Synonym		TRO
Oncidium ostenianum Schltr.	Synonym		WCSP
Oncidium ototmeton Kraenzl.	Synonym		WCSP
Oncidium ottonis Schltr.	Accepted		WCSP
Oncidium ottonis Rchb.f. ex Kraenzl. [Illegitimate]	Synonym		WCSP
Oncidium ouricanense V.P.Castro & Campacci	Accepted		WCSP
Oncidium ovatilabium C.Schweinf.	Synonym		WCSP
Oncidium oviedomotae Hágsater	Accepted		WCSP
Oncidium oxapampanum Dodson & Bennett	Unresolved		TRO
Oncidium oxyacanthosmum Rchb.f. ex Linden	Synonym		WCSP
Oncidium oxyceras (Königer & J.G. Weinm.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium oxystegium Kraenzl.	Synonym		WCSP
Oncidium pabstii Campacci & C.Espejo	Accepted		WCSP
Oncidium pachyphyllum Hook.	Synonym		WCSP
Oncidium palaciosii Dodson	Synonym		WCSP
Oncidium paleatum Schltr.	Synonym		WCSP
Oncidium pallidiflavum Schltr.	Unresolved		TRO
Oncidium pallidum Lindl.	Synonym		WCSP
Oncidium palmophilum Mart. ex Lindl.	Synonym		TRO
Oncidium panamense Schltr.	Accepted		WCSP
Oncidium panchrysum Lindl.	Accepted		WCSP
Oncidium panduratoides M.W.Chase & N.H.Williams	Unresolved		WCSP (in review)
Oncidium panduratum Rolfe	Accepted		WCSP
Oncidium panduriferum Kunth	Synonym		WCSP
Oncidium panduriforme Ames & C.Schweinf.	Synonym		WCSP
Oncidium pantherinum Hoffmanns. ex Lindl.	Synonym		WCSP
Oncidium panturatoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium papilio Lindl.	Synonym		WCSP
Oncidium papilio var. albiflorum Rchb.f. ex Lindl.	Synonym		WCSP
Oncidium papilio var. kramerianum (Rchb. f.) Lindl.	Synonym		TRO
Oncidium papilio var. latourae Broadway	Synonym		WCSP
Oncidium papilio f. latourae (Broadway) Hawkes	Synonym		WCSP
Oncidium papilio var. limbatum Hook.	Synonym		WCSP
Oncidium papilioides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium papilioniforme Regel	Synonym		WCSP
Oncidium paranaense Kraenzl.	Accepted		WCSP
Oncidium paranapiacabense Hoehne	Accepted		WCSP
Oncidium pardalis Rchb.f.	Synonym		WCSP
Oncidium pardinum (Lindl.) Beer	Synonym		WCSP
Oncidium pardoglossum Rchb.f.	Accepted		WCSP
Oncidium pardothyrsus Rchb.f. & Warsz.	Synonym		WCSP
Oncidium parviflorum L.O.Williams	Accepted		WCSP
Oncidium pastasae Rchb.f.	Synonym		WCSP
Oncidium pastorellii Dodson & D.E.Benn.	Synonym		WCSP
Oncidium patulum Schltr.	Synonym		WCSP
Oncidium pauciflorum Lindl.	Synonym		WCSP
Oncidium pavonii Rchb.f. & Warsz. ex Lindl.	Synonym		WCSP
Oncidium pectorale Lindl.	Accepted		WCSP
Oncidium pectorale var. caloglossum (Rchb.f.) Cogn.	Synonym		WCSP
Oncidium pectorale var. larkinianum (Gower) Cogn.	Synonym		WCSP
Oncidium pectorale var. mantinii (God.-Leb.) Cogn.	Synonym		WCSP
Oncidium pelicanum Lindl.	Synonym		WCSP
Oncidium pelicanum Mart.	Synonym		TRO
Oncidium peliogramma Linden & Rchb.f.	Synonym		WCSP
Oncidium peltiforme Königer	Accepted		WCSP
Oncidium pentadactylon Lindl.	Accepted		WCSP
Oncidium pentaspilum Hoffmanns. ex Lindl.	Synonym		WCSP
Oncidium pentecostale Rchb.f.	Synonym		WCSP
Oncidium perchoiri hort. ex Moir	Unresolved		TRO
Oncidium pergameneum Lindl.	Accepted		WCSP
Oncidium perpusillum (Kraenzl.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium peruvianoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium peruvianum (Poepp. & Endl.) Rchb.f.	Synonym		WCSP
Oncidium pescatorei (Linden ex Lindl.) Beer	Synonym		WCSP
Oncidium phalaenopsis Linden & Rchb.f.	Synonym		WCSP
Oncidium phalaenopsis var. excellens Lindl.	Synonym		WCSP
Oncidium phantasmaticum Lem.	Synonym		WCSP
Oncidium phyllochilum (C.Morren) Beer	Synonym		WCSP
Oncidium phylloglossum Rchb.f.	Synonym		WCSP
Oncidium phymatochilum Lindl.	Synonym		WCSP
Oncidium pichinchensis (Dodson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium pictoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium pictum Kunth	Accepted		WCSP
Oncidium picturatissimum (Kraenzl.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium picturatum Rchb.f.	Accepted		WCSP
Oncidium pinellianum Lindl.	Synonym		WCSP
Oncidium pirarense Rchb.f.	Accepted		WCSP
Oncidium pittieri Schltr.	Synonym		WCSP
Oncidium plagianthum Rchb.f.	Synonym		WCSP
Oncidium planilabre Lindl.	Accepted		WCSP
Oncidium platybulbon Regel	Synonym		WCSP
Oncidium platychilum Schltr.	Accepted		WCSP
Oncidium platyglossum Rchb.f. ex Linden	Synonym		WCSP
Oncidium platynaris (Dalström) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium plicigerum Rchb.f.	Synonym		WCSP
Oncidium pluviaflorum Kraenzl.	Synonym		WCSP
Oncidium pohlianum Cogn.	Synonym		WCSP
Oncidium poikilostalix (Kraenzl.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium pollardii Dodson & Hágsater	Synonym		WCSP
Oncidium pollettianum Rchb.f.	Synonym		WCSP
Oncidium polyadenium Lindl.	Accepted		WCSP
Oncidium polychromum Scheidw.	Synonym		WCSP
Oncidium polycladium Rchb.f. ex Lindl.	Accepted		WCSP
Oncidium polyodontum Kraenzl.	Accepted		WCSP
Oncidium polystachyoides F.Lehm. & Kraenzl.	Synonym		WCSP
Oncidium pongratzianum Königer & J.Portilla	Accepted		WCSP
Oncidium pontagrossense Campacci	Accepted		TRO
Oncidium porrigens Rchb.f.	Synonym		WCSP
Oncidium portillae Königer	Accepted		WCSP
Oncidium portillaellum M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium portilloides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium portmannii (Bockemühl) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium portmannii subsp. cohrsiae (Bockemühl) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium posadaroides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium posadarum Königer	Accepted		WCSP
Oncidium povedanum (P. Ortiz) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium powellii Schltr.	Synonym		WCSP
Oncidium praenitens (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium praestanoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium praestans Rchb.f.	Synonym		WCSP
Oncidium praetextum Rchb.f.	Accepted		WCSP
Oncidium prionochilum Kraenzl.	Synonym		WCSP
Oncidium proliferum Rchb.f. ex Kraenzl.	Synonym		WCSP
Oncidium pseudomelanthes (D.E. Benn. & Christenson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium pseudounguiculatum (Pupulin & Dressler) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium psittacinum Linden ex Lindl.	Synonym		WCSP
Oncidium psyche Schltr.	Synonym		WCSP
Oncidium puberum Spreng.	Synonym		WCSP
Oncidium pubes Lindl.	Accepted		WCSP
Oncidium pubes var. flavescens Hook.	Synonym		WCSP
Oncidium pubescens Duch.	Unresolved		TRO
Oncidium pulchellum Hook.	Synonym		WCSP
Oncidium pulchellum f. apiculatum (Moir) Withner	Synonym		WCSP
Oncidium pulchellum f. berenyce (Rchb.f.) Withner	Synonym		WCSP
Oncidium pulchellum subsp. concavum (Moir) Braem	Synonym		WCSP
Oncidium pulchellum f. concavum (Moir) Withner	Synonym		WCSP
Oncidium pulchellum f. cuneilabium (Moir) Withner	Synonym		WCSP
Oncidium pulchellum f. hartii (Moir) Withner	Synonym		WCSP
Oncidium pulchellum f. jamaicense (Moir & A.D.Hawkes) Withner	Synonym		WCSP
Oncidium pulchellum f. sanctae-anae (Moir & A.D.Hawkes) Withner	Synonym		WCSP
Oncidium pulchellum f. withneranum (Moir) Withner	Synonym		WCSP
Oncidium pulvinatum Lindl.	Synonym		WCSP
Oncidium pulvinatum var. grandiflorum Regel	Synonym		WCSP
Oncidium pulvinatum var. minarum Hoehne & Schltr.	Synonym		WCSP
Oncidium pumilio Rchb.f.	Synonym		WCSP
Oncidium pumilum Lindl.	Synonym		WCSP
Oncidium pumilum var. angustifolium Cogn.	Synonym		WCSP
Oncidium pumilum var. laxum Kraenzl.	Synonym		WCSP
Oncidium pumilum var. megalanthum Schltr.	Synonym		WCSP
Oncidium pumilum var. robustum Cogn.	Synonym		WCSP
Oncidium punctulatum Dressler	Accepted		WCSP
Oncidium pusillum (L.) Rchb.f.	Synonym		WCSP
Oncidium pusillum var. megalanthum Schltr.	Synonym		TRO
Oncidium putumayensis (P. Ortiz) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium pygmaeum (Lindl.) Beer	Synonym		WCSP
Oncidium pyramidale Lindl.	Synonym		WCSP
Oncidium pyxidophorum Rchb.f.	Accepted		WCSP
Oncidium quadricorne Klotzsch	Synonym		WCSP
Oncidium quadrilobum C.Schweinf.	Synonym		WCSP
Oncidium quadripetalum Sw.	Synonym		WCSP
Oncidium racemosum (Lindl.) Rchb.f.	Synonym		WCSP
Oncidium radiatum (Lindl.) Rchb.f. ex Foldats	Synonym		WCSP
Oncidium ramiferum Klotzsch	Synonym		WCSP
Oncidium ramosissimum (Lindl.) Beer	Synonym		WCSP
Oncidium ramosum Lindl.	Accepted		WCSP
Oncidium ramulosum (Lindl.) Beer	Synonym		WCSP
Oncidium raniferum Lindl.	Accepted		WCSP
Oncidium raniferum var. majus Hook.	Synonym		WCSP
Oncidium rariflorum A.Rich. & Galeotti	Synonym		WCSP
Oncidium rechingerianum Kraenzl.	Synonym		WCSP
Oncidium reductum Kraenzl.	Accepted		WCSP
Oncidium reflexum Lindl.	Accepted		WCSP
Oncidium reflexum var. intermedium Regel	Synonym		WCSP
Oncidium refractum Rchb.f.	Synonym		WCSP
Oncidium regentii V.P.Castro & G.F.Carr	Accepted		WCSP
Oncidium regnellii (Rchb.f.) Rchb.f.	Synonym		WCSP
Oncidium reichenbachianum (Kraenzl.) M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium reichenbachii Lindl.	Synonym		WCSP
Oncidium reichenheimii (Linden & Rchb.f.) Garay & Stacy	Accepted		WCSP
Oncidium reidianum Paxton	Unresolved		TRO
Oncidium reisii Hoehne & Schltr.	Synonym		WCSP
Oncidium remotiflorum Garay	Synonym		WCSP
Oncidium renatoi (Königer) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium retemeyerianum Rchb.f.	Synonym		WCSP
Oncidium retusum Lindl.	Accepted		WCSP
Oncidium retusum (Lindl.) Beer [Illegitimate]	Synonym		WCSP
Oncidium reversoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium reversum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium revolutum (Lindl.) Beer	Synonym		WCSP
Oncidium rhinoceros Rchb.f.	Synonym		WCSP
Oncidium rhodostictum Kraenzl.	Synonym		WCSP
Oncidium rhombicallum (D.E. Benn. & Christenson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium rhynchanthum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium rhynchophorum Schltr. ex Hoehne	Unresolved		TRO
Oncidium rigbyanum Paxton	Synonym		WCSP
Oncidium rigidum (Lindl.) Beer	Synonym		WCSP
Oncidium riograndense Cogn.	Accepted		WCSP
Oncidium riopalenqueanum Dodson	Synonym		WCSP
Oncidium riviereanum St.-Lég.	Accepted		WCSP
Oncidium robustissimum Rchb.f.	Synonym		WCSP
Oncidium rodrigoi Königer	Accepted		WCSP
Oncidium rogersii Bateman	Synonym		WCSP
Oncidium rolfeanum Sander	Synonym		WCSP
Oncidium romanii Königer	Accepted		WCSP
Oncidium roseoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium roseum (Lindl.) Beer	Synonym		WCSP
Oncidium roseum Lodd. [Invalid]	Synonym		WCSP
Oncidium roseum Lodd. ex Lindl.	Synonym		TRO
Oncidium rossii Beer	Synonym		WCSP
Oncidium rostrans Rchb.f.	Synonym		WCSP
Oncidium rostratum (Schltr.) Garay	Synonym		WCSP
Oncidium rotundatum Rchb.f.	Synonym		WCSP
Oncidium rubrocallosum (D.E. Benn. & Christenson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium rupestre Lindl.	Synonym		WCSP
Oncidium rupestre var. skinneri (Lindl.) Lindl.	Synonym		WCSP
Oncidium rusbyi Rolfe	Synonym		WCSP
Oncidium russellianum Lindl.	Synonym		WCSP
Oncidium russellianum var. pallidum Regel	Synonym		WCSP
Oncidium rusticum Linden & Rchb.f.	Synonym		WCSP
Oncidium rutkisii Foldats	Accepted		WCSP
Oncidium saintlegerianum Rolfe	Synonym		WCSP
Oncidium saltabundum Rchb.f.	Synonym		WCSP
Oncidium saltator Lem.	Synonym		WCSP
Oncidium salvadorense Schltr.	Synonym		WCSP
Oncidium salvum Rchb.f. [Unplaced]	Unresolved		WCSP
Oncidium sanctae-anae Moir & A.D.Hawkes	Synonym		WCSP
Oncidium sancti-pauli Kraenzl.	Synonym		WCSP
Oncidium sanderae Rolfe	Synonym		WCSP
Oncidium sanderianum Rolfe	Synonym		WCSP
Oncidium sanguineum Lindl.	Synonym		WCSP
Oncidium sanguineum var. roseum Regel	Synonym		WCSP
Oncidium sanguinolentum (Lindl.) Schltr.	Synonym		WCSP
Oncidium santanderianum Kraenzl.	Synonym		WCSP
Oncidium santiagorum Königer	Synonym		WCSP
Oncidium sarcodes Lindl.	Accepted		WCSP
Oncidium sasseri Moir	Synonym		WCSP
Oncidium savegrensis (Pupulin) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium sawyeri L.O.Williams	Synonym		WCSP
Oncidium saxicola Schltr.	Accepted		WCSP
Oncidium scabripes Kraenzl.	Synonym		WCSP
Oncidium scandens Moir	Synonym		WCSP
Oncidium scansor Rchb.f.	Synonym		WCSP
Oncidium sceptrum (Rchb. f. & Warsz.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium sceptrum var. facetum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium schadei L.O.Williams	Synonym		WCSP
Oncidium schillerianum Rchb.f.	Accepted		WCSP
Oncidium schlimii Linden ex Lindl. & Paxton	Synonym		WCSP
Oncidium schmidtianum Rchb.f.	Synonym		WCSP
Oncidium schrautianum Königer	Unresolved		WCSP (in review)
Oncidium schroederianum (O'Brien) Garay & Stacy	Accepted		WCSP
Oncidium × schroederianum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium schunkeanum Campacci & Cath.	Accepted		WCSP
Oncidium schwambachiae V.P.Castro & Toscano	Accepted		WCSP
Oncidium sciurus Scheidw.	Synonym		WCSP
Oncidium sclerophyllum Kraenzl.	Synonym		WCSP
Oncidium scriptum (Scheidw.) Rchb.f.	Synonym		WCSP
Oncidium × scullyi Pabst & A.F.Mello	Accepted		WCSP
Oncidium sculptum Rchb. f. ex L. Linden	Synonym		TRO
Oncidium sellowii Cogn.	Accepted		WCSP
Oncidium semele Linden ex Rchb.f.	Synonym		WCSP
Oncidium sepula Hoffmanns.	Synonym		WCSP
Oncidium sergii (P. Ortiz) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium serpens Lindl.	Synonym		WCSP
Oncidium serratum Lindl.	Synonym		WCSP
Oncidium sessile Lindl. & Paxton	Accepted		WCSP
Oncidium signatum Rchb.f. [Invalid]	Synonym		WCSP
Oncidium silvanoi Königer	Accepted		WCSP
Oncidium silvanum V.P.Castro & Campacci	Accepted		WCSP
Oncidium simulans (Schltr.) Garay	Synonym		WCSP
Oncidium skinneri Lindl.	Synonym		WCSP
Oncidium sodiroi Schltr.	Synonym		WCSP
Oncidium sotoanum R. Jiménez & Hágsater	Accepted		TRO
Oncidium spathaceum (Lindl.) Beer	Synonym		WCSP
Oncidium spathaceum Rchb.f.	Synonym		WCSP
Oncidium spathulatum (Lindl.) Stacy	Synonym		WCSP
Oncidium speciosum (Klotzsch) Rchb.f.	Synonym		WCSP
Oncidium spectabile (Lindl.) Beer	Synonym		WCSP
Oncidium spectatissimum (Lindl.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium spegazzinianum (Kraenzl.) Schltr.	Synonym		WCSP
Oncidium sphacelatum Lindl.	Accepted		WCSP
Oncidium sphacelatum var. majus Lindl.	Synonym		WCSP
Oncidium sphacelatum var. minus Lindl.	Synonym		WCSP
Oncidium sphacelatum f. xanthinum Roeth & O.Gruss	Synonym		WCSP
Oncidium sphegiferum Lindl.	Synonym		WCSP
Oncidium spilopterum Lindl.	Accepted		WCSP
Oncidium spilotanthum Rchb. f. ex L. Linden	Unresolved		TRO
Oncidium splendidum A.Rich. ex Duch.	Synonym		WCSP
Oncidium splendidum var. holoxanthum auct.	Synonym		WCSP
Oncidium splendidum var. xanthinum auct.	Synonym		WCSP
Oncidium sprucei Lindl.	Synonym		WCSP
Oncidium stacyi Garay	Synonym		WCSP
Oncidium stellatum (Lindl.) Beer	Synonym		WCSP
Oncidium stelligerum Rchb.f.	Accepted		WCSP
Oncidium stelligerum var. ernestii B.S.Williams	Synonym		WCSP
Oncidium × stellimicans (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium stenobulbon Kraenzl.	Accepted		WCSP
Oncidium stenochilum Linden & Rchb. f.	Unresolved		TRO
Oncidium stenoglossum (Schltr.) Dressler & N.H.Williams	Accepted		WCSP
Oncidium stenopetalum Klotzsch	Synonym		WCSP
Oncidium stenostalix Rchb.f. ex Kraenzl.	Synonym		WCSP
Oncidium stenotis Rchb.f.	Synonym		WCSP
Oncidium steyermarkii Foldats	Synonym		WCSP
Oncidium stipitatum Lindl.	Synonym		WCSP
Oncidium stipitatum var. platyonyx Rchb.f.	Synonym		WCSP
Oncidium storkii Ames & C.Schweinf.	Accepted		WCSP
Oncidium stramineum Bateman ex Lindl.	Synonym		WCSP
Oncidium strictum (Cogn.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium suave Lindl.	Synonym		WCSP
Oncidium suaveolens Rchb.f.	Synonym		WCSP
Oncidium subciliatum Hoffmanns.	Synonym		WCSP
Oncidium subcruciforme (A.H.Heller) Garay & Stacy	Synonym		WCSP
Oncidium subcruciforme (A.H. Heller) Salazar	Synonym		TRO
Oncidium subobscurum Kraenzl.	Synonym		WCSP
Oncidium subulifolium Schltr. [Illegitimate]	Synonym		WCSP
Oncidium subuligerum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium superbiens Rchb.f.	Synonym		WCSP
Oncidium superfluum Rchb.f.	Synonym		WCSP
Oncidium suscephalum Barb.Rodr.	Synonym		WCSP
Oncidium suttonii Bateman ex Lindl.	Synonym		WCSP
Oncidium swartzii Chiron & Braem	Synonym		WCSP
Oncidium sylvestre Lindl.	Synonym		WCSP
Oncidium tarquiense Stacy	Synonym		WCSP
Oncidium tayleurii Lindl.	Synonym		WCSP
Oncidium tectum Rchb.f.	Accepted		WCSP
Oncidium tenellum F.Gérard	Accepted		WCSP
Oncidium tenense Rchb.f. & Warsz.	Synonym		WCSP
Oncidium tenue Lindl.	Synonym		WCSP
Oncidium tenue var. grandiflorum Lindl.	Synonym		TRO
Oncidium tenuifolium (Dalström) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium tenuipes Kraenzl.	Accepted		WCSP
Oncidium tenuirostris (Kraenzl.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium tenuoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium teres Ames & C.Schweinf.	Synonym		WCSP
Oncidium teretifolium auct. [Unplaced]	Unresolved		WCSP
Oncidium tetracopis Rchb.f.	Synonym		WCSP
Oncidium tetrapetalum (Jacq.) Willd.	Synonym		WCSP
Oncidium tetraskelidion Kraenzl.	Synonym		WCSP
Oncidium tetrotis Rchb.f. & Warsz.	Accepted		WCSP
Oncidium thyrsiflorum Barb.Rodr.	Synonym		WCSP
Oncidium tigratum Rchb.f. & Warsz.	Accepted		WCSP
Oncidium tigrinum Lex.	Accepted		WCSP
Oncidium tigrinum Lindl.	Synonym		WCSP
Oncidium tigrinum var. albens Rchb. f.	Synonym		TRO
Oncidium tigrinum var. elatum Lex.	Synonym		WCSP
Oncidium tigrinum var. giganteum Lex.	Synonym		WCSP
Oncidium tigrinum var. splendidum (A.Rich. ex Duch.) Hook.f.	Synonym		WCSP
Oncidium tigrinum var. unguiculatum (Lindl.) Lindl.	Synonym		WCSP
Oncidium tigroides (C. Schweinf.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium tipuloides Rchb.f.	Accepted		WCSP
Oncidium titania Schltr.	Synonym		WCSP
Oncidium toachicum Dodson	Accepted		WCSP
Oncidium tonduzii Schltr.	Synonym		WCSP
Oncidium trachycaulon Schltr.	Accepted		WCSP
Oncidium trichodes Lindl.	Synonym		WCSP
Oncidium tricolor Hook.	Synonym		WCSP
Oncidium tricolorum Beer ex Lindl.	Unresolved		TRO
Oncidium tricostatum (Kraenzl.) Garay	Synonym		WCSP
Oncidium tricuspidatum Rchb.f.	Synonym		WCSP
Oncidium trifurcatum Lindl.	Synonym		WCSP
Oncidium trilingue Lindl.	Synonym		WCSP
Oncidium trilingue Sander	Synonym		TRO
Oncidium trilobum (Schltr.) Garay & Stacy	Synonym		WCSP
Oncidium trimorion (Königer) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium trinasutum Kraenzl.	Accepted		WCSP
Oncidium tripterygium Rchb.f.	Synonym		WCSP
Oncidium tripudians (Rchb. f. & Warsz.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium triquetrum (Sw.) R.Br.	Synonym		WCSP
Oncidium triquetrum x cebolleta	Unresolved		TRO
Oncidium trulla Rchb.f. & Warsz.	Synonym		WCSP
Oncidium trulliferum Lindl.	Synonym		WCSP
Oncidium truncatum Pabst	Accepted		WCSP
Oncidium tsubotae Königer	Accepted		WCSP
Oncidium tucumanense Rchb.f.	Synonym		WCSP
Oncidium tuerckheimii Cogn.	Synonym		WCSP
Oncidium tunguraguense Stacy	Synonym		WCSP
Oncidium turialbae Schltr.	Synonym		WCSP
Oncidium turpe Kraenzl.	Synonym		WCSP
Oncidium uaipanense Schnee	Synonym		WCSP
Oncidium uhlii (Chiron & V.P.Castro) Königer	Accepted		WCSP
Oncidium uliginosum Barb.Rodr.	Synonym		WCSP
Oncidium ultrajectinum Pulle	Synonym		WCSP
Oncidium umbonatum Rchb.f.	Synonym		WCSP
Oncidium umbrosum (Rchb.f.) Rchb.f.	Synonym		WCSP
Oncidium uncia Rchb.f. ex Kraenzl.	Synonym		WCSP
Oncidium undulatum (Sw.) Salisb.	Synonym		WCSP
Oncidium undulatum Lindl. [Illegitimate]	Synonym		WCSP
Oncidium undulatum Warner & B.S. Williams	Synonym		TRO
Oncidium undulatum f. flavovirens P.M.Br.	Synonym		WCSP
Oncidium unguiculatum Lindl.	Accepted		WCSP
Oncidium unguiculatum Klotzsch	Synonym		WCSP
Oncidium unguiculoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium unguitigrinum A.V.Navarro	Synonym		WCSP
Oncidium unicolor Rolfe	Synonym		WCSP
Oncidium unicorne Lindl.	Synonym		WCSP
Oncidium unicornutum Knowles & Westc.	Synonym		WCSP
Oncidium uniflorum Booth ex Lindl.	Accepted		WCSP
Oncidium uniflorum var. robustum Regel	Synonym		WCSP
Oncidium universitas-cuencae Königer & D.Vázquez	Accepted		WCSP
Oncidium urophyllum Lodd. ex Lindl.	Synonym		WCSP
Oncidium urophyllum f. flavum R.J.Midgett	Synonym		WCSP
Oncidium usneoides Lindl.	Synonym		WCSP
Oncidium ustulatum Rchb.f.	Synonym		WCSP
Oncidium vagans C.Schweinf.	Synonym		WCSP
Oncidium varians Schltr.	Synonym		WCSP
Oncidium varicosum Lindl.	Accepted		WCSP
Oncidium varicosum var. charlesworthii auct.	Synonym		WCSP
Oncidium varicosum var. concolor Cogn.	Synonym		WCSP
Oncidium varicosum var. insigne Rolfe	Synonym		WCSP
Oncidium varicosum var. lindenii auct.	Synonym		WCSP
Oncidium varicosum var. moortebeekiense L.Linden	Synonym		WCSP
Oncidium varicosum var. rogersii (Bateman) Rchb.f.	Synonym		WCSP
Oncidium varicosum var. southorangense Grey	Synonym		WCSP
Oncidium varicosum var. vexillarium Rchb.f. ex Kraenzl.	Synonym		WCSP
Oncidium variegatum (Sw.) Sw.	Synonym		WCSP
Oncidium variegatum f. album (Moir & A.D.Hawkes) Withner	Synonym		WCSP
Oncidium variegatum var. bahamense (Nash) Withner	Synonym		WCSP
Oncidium variegatum subsp. bahamense (Nash) Withner	Synonym		WCSP
Oncidium variegatum f. furcyense (Moir) Withner	Synonym		WCSP
Oncidium variegatum subsp. leiboldii (Rchb.f.) Withner	Synonym		WCSP
Oncidium variegatum f. majus (Moir & A.D.Hawkes) Withner	Synonym		WCSP
Oncidium variegatum var. purpureum Moir & A.D.Hawkes	Synonym		WCSP
Oncidium variegatum f. purpureum (Moir) Withner	Synonym		WCSP
Oncidium variegatum var. roseum Moir & A.D.Hawkes	Synonym		WCSP
Oncidium variegatum f. roseum (Moir & A.D.Hawkes) Withner	Synonym		WCSP
Oncidium variegatum subsp. scandens (Moir) Withner	Synonym		WCSP
Oncidium variegatum subsp. sylvestre (Lindl.) Withner	Synonym		WCSP
Oncidium variegatum f. varvelum (Moir) Withner	Synonym		WCSP
Oncidium variegatum var. velutinum (Lindl. & Paxton) Griseb.	Synonym		WCSP
Oncidium variegatum subsp. velutinum (Lindl. & Paxton) Withner	Synonym		WCSP
Oncidium varvelum Moir [Invalid]	Synonym		WCSP
Oncidium vasquezii Christenson	Accepted		WCSP
Oncidium velleum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium vellozeanum Pabst	Synonym		WCSP
Oncidium veltenianum (V.P.Castro & Chiron) Königer	Accepted		WCSP
Oncidium velutinum Lindl. & Paxton	Synonym		WCSP
Oncidium velutinum var. purpureum Moir [Invalid]	Synonym		WCSP
Oncidium ventilabrum Rchb.f. & Warsz.	Synonym		WCSP
Oncidium venustum Drapiez	Accepted		WCSP
Oncidium vernixium Linden & Rchb.f.	Accepted		WCSP
Oncidium verrucosissimum Cogn.	Synonym		WCSP
Oncidium verrucosum (Bateman ex Lindl.) Rchb.f.	Synonym		WCSP
Oncidium versteegianum Pulle	Synonym		WCSP
Oncidium vexillarium (Rchb.f. ex Kraenzl.) Königer	Accepted		WCSP
Oncidium vexillarium Rchb. f.	Synonym		TRO
Oncidium vierlingii (Senghas) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium villosum (Lindl.) Rchb.f.	Synonym		WCSP
Oncidium viperinum Lindl.	Accepted		WCSP
Oncidium virgulatum Rchb.f.	Synonym		WCSP
Oncidium volubile (Poepp. & Endl.) Cogn.	Synonym		WCSP
Oncidium volvox Rchb.f.	Synonym		WCSP
Oncidium vulcanicum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium wageneri (Rchb.f.) Rchb.f.	Synonym		WCSP
Oncidium wallisii (Linden & Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium wallisoides M.W. Chase & N.H. Williams	Accepted		TRO
Oncidium waluewa Rolfe	Accepted		WCSP
Oncidium warmingii Rchb.f.	Accepted		WCSP
Oncidium warneri (Lindl.) Lindl.	Synonym		WCSP
Oncidium warneri var. purpuratum (Lindl.) Lindl.	Synonym		WCSP
Oncidium warneri var. sordidum (Lindl.) Lindl.	Synonym		WCSP
Oncidium warscewiczii Rchb. f.	Accepted		TRO
Oncidium warszewiczii Rchb.f.	Accepted		WCSP
Oncidium weberbauerianum Kraenzl.	Synonym		WCSP
Oncidium weddellii Lindl.	Accepted		WCSP
Oncidium weinmannianum (Königer) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium welteri Pabst	Accepted		WCSP
Oncidium weltonii (auct.) W.Bull ex Regel	Synonym		WCSP
Oncidium wendlandianum Rchb.f.	Synonym		WCSP
Oncidium wentworthianum Bateman ex Lindl.	Accepted		WCSP
Oncidium wentworthianum var. tenue (Lindl.) Ames & Correll	Synonym		WCSP
Oncidium wercklei Schltr.	Synonym		WCSP
Oncidium werneri Schltr.	Synonym		WCSP
Oncidium wheatleyanum Gower	Synonym		WCSP
Oncidium widgrenii Lindl.	Accepted		WCSP
Oncidium × wilckeanum (Rchb. f.) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium williamsianum Dodson	Synonym		WCSP
Oncidium williamsii Schltr.	Accepted		WCSP
Oncidium withneranum Moir	Synonym		WCSP
Oncidium wittii Oppenheim	Synonym		WCSP
Oncidium wittmannianum Königer	Accepted		WCSP
Oncidium wrayae Hook.	Synonym		WCSP
Oncidium wyattianum (G. Wilson) M.W. Chase & N.H. Williams	Synonym		TRO
Oncidium wydleri Rchb.f.	Synonym		WCSP
Oncidium xanthocentron Rchb.f.	Synonym		WCSP
Oncidium xanthochlorum Klotzsch	Synonym		WCSP
Oncidium xanthodon Rchb.f.	Synonym		WCSP
Oncidium xanthornis Rchb.f. ex Kraenzl.	Accepted		WCSP
Oncidium xanthornis Rchb. f.	Unresolved		TRO
Oncidium zappii Pabst	Accepted		WCSP
Oncidium zebrinum (Rchb.f.) Rchb.f.	Synonym		WCSP
Oncidium zelenkoanum Dressler & Pupulin	Accepted		WCSP
Oncidium zikanianum Hoehne & Schltr.	Synonym		WCSP
Oncidium zonatum Cogn.	Synonym		WCSP