Oncidium page

SUBFAMILY Epidendroideae TRIBE oncidieae

The genus Oncidium is one of the larger genera and soon will probably be torn apart and few species will be left, but for now it is large and widespread over almost all of tropical America. The genus is characterized by the presence of one or two leafed psuedobulbs with a single internode that is normally subtended by distichous leaflike sheaths which give rise to the inflorescense. The flowers are spurless and often have wings on either side of the stigma and it has a footless column that has the basal part of the lip attached. It has two hard pollina attached to a stipe connected to a viscidium. Oncidiums as a whole are epiphytes but there are lithophitic occurances and some can be terrestrial, and all occuring from sea level to 4000m. As a whole intermediate, well watered, even conditions year round, with moderate shade will be successful.

The species list below was composed with information from the following sources.

The Illustrated Encyclopedia of Orchids by Alec Pridgeon. Published by the Timber Press

The Manual Of Cultivated Orchid Species By Bechtel, Cribb and Launert, Published by The MIT Press

Native Colombian Orchids Volumes 1-6 Published by Editorial Colina By the Colombian Orchid Society

An Introduction to the Orchids Of Mexico By Andrew Wiard Published by Comstock Cornell

Orchids Of Brazil By Jim & Barbara McQueen Published by Timber Press

Field Guide to the Orchids of Costa Rica And Panama By Robert L Dressler Published by Comstock Cornell

Orchids of Guatemala and Belize By Oakes Ames And Donovan Correl Published by Dover

A Guide to the Orchids Of the World By Hodgson, Paine, and Anderson Published by Angus Miniature Orchids By Rebecca Tyson Northen Published by Prentice Hall Press

Home Orchid Gowing By Rebecca Tyson Northen Published by Prentice Hall Press

Species that are synonyms of correct species are indicated with a ~.

1. abortivum
-Colombia and Venezuela - Flowers in Spring - minature - All flowers on the inflorescence are aborted other than the furthest out which flowers, the others appear as small stars
2. abruptum Linden & Rchb.f
- Colombia - Warm

~acrobotryum Klotzsch - See O. harrisonianum

3. aciniceum Lindl.
- Colombia
4. advena Rchb.f.
- Costa Rica and Panama
5. aemulum Rchb.f & Warsz.
- Colombia
6. alcicorne Rchb.f
- Colombia
7. aloisii
? - RHS Sanders list
8. altissimum [Jacq.]Sw.
- Colombia, Lesser Antilles, Martinique and St Vincent - Flowers in Spring - Epiphyte - closely related to O. baueri

~altissimum - Misapplied See O. luridum

9. ampliatum Lindl.
- Guatemala to Panama, Colombia, Ecuador, Peru, Venezuela and Trinidad - Flowers in Spring - Intermediate to warm - Closely related to O. isthmii
10. angustisepalum Kraenzl.
-Costa Rica
11. annulare Rchb.f
- Colombia
12. anomalum Rchb.f.
- Colombia
13. ansiferum Rchb.f.
- Costa Rica, Guatemala and Panama - Alt 800-2500m - Large epiphyte - intermediate to cool
14. anthrocrene Rchb.f.
- Colombia - Hot
15. antioquiense Kraenzl
- Colombia

~anulare - ? Sanders list

16. arizajulianum
? Sanders list
17. ascendens Lindl
- Mexico to Costa Rica and the West Indies - Flowers in Winter to Early Spring - Alt 0-1500m - Epiphyte in swamps, pastures and open forest

~asparagoides - See O. heteranthum

18. aureum
- Ecuador -

var bicolor

19. auriferum Rchb.f.
- Colombia
20. aurisasinorum Standley & Wms.
- Honduras - Small Mule ear epiphyte - Flowers in Autumn

~aurosum Rchb.f. - See. O. excavatum

21. aurisasinorum
- ? Sanders list

~bahiense - See O. ciliatum

22. baldeviamae Rchb.f
- Colombia, eastern cordillera - Cool - epiphyte
23. ballii Rolfe
- Colombia
24. barbatum Lindl.
- Brazil - Alt 500-1200m - Flowers in Spring - Intermediate - Dwarf epiphyte - Bright filtered light - Heavy water in summer and then less through the winter

~var labiosum - See O. ciliatum

~batemanianum Param. ex Knowles & Westcott - See O. spilopterum

25. bauerii Lindl.
- West Indies, Nicaragua, Costa Rica, Panama,Colombia, Brazil, Peru, Bolivia and Ecuador - Alt 0-1200m - Flowers in August - Large epiphyte

~bernoullianum Krenz. - See O. ampliatum

26. berenyce
- ?Sanders list
27. bicallosum Lindl.
- Mexico, El Salvador and Guatemala - Alt 0-1500-2200m - Flowers in Late autumn to early winter - Mule ear epiphyte
28. bicolor Lindl.
- Venezuela and Colombia -

~bicornutum Hkr. - See O. pubes

29. bifolium Sims
- Brazil, Uruguay, Argentina and Bolivia - Alt 200-1000m - Flowers in Summer - Small epiphyte - Lowlands on shady streambanks to highlands - Intermediate - Moderate shade, high humidity and a drier winter
30. blanchettii Rchb.f.
- Brazil And Bolivia - Flowers in late winter til Spring - Alt 100-1000m - Semi terrestrial - Sandy cracks between rocks or rock crevasses with decaying plant material - Bright light - winter water reduction - potted with coarse well draining media
31. boothianum Rchb.f.
- Colombia

~brachiatum [Lindl.]Rchb.f.- See Brassia verracosa

32. brachyandrum Lindl.
- Mexico, Guatemala and Honduras - Alt 1000-3000m - Flowers in Spring on old growth - Terrestrial or lithophyte on rocks on stream banks in open montane forest

~brachyphyllum - See O.cebolleta

33. brachystachys Kraenzl
- Colombia
34. brachyterum Linden & Rchb.f
Colombia
35. bracteatum Rchb.f & Warsc.
- Costa Rica and Panama - Alt 6000-7000ft - Cold grower -

~brassia Rchb.f. - See Brassia maculata

~brenesii Schltr. - See O. obryzatum

36. brevilabrum Rolfe
-Colombia
37. bryocladium Schltr.
- Colombia

~bryolophotum Rchb.f. - See O. heteranthum

38. cabagrae Schltr.
-Colombia, Panama and Costa Rica - Alt 300m-2500m - Flowers in the Summer - Minature epiphyte - warm to intermediate
39. calochilum
- Hispanola and Cayman Islands - Flowers in Spring - minature

~Candida Lindley - see Palumbina candida[ Lindley]Rchb.f

~candidum Lindl. - See Palumbina candida[Lindley]Rchb.f.

40. carderi Rchb.f
- Colombia

~cardiochilum Lindl. - See O. ochmatochilum - Colombia

41. caribense
- ? Sanders list
42. cariniferum [Rchb.f.]Beer
- Costa Rica, Panama and Venezuela - Alt 5000' - Flowers in Spring - intermediate - West facing slopes in montane forest
43. carthagenense [Jacq.]Sw.
- Florida south through all Central America, Northern South America and the West Indies - Alt 0-1500m - Flowers in Spring and Summer - Intermediate to warm -large mule ear epiphyte
44. cavendishiannum Bateman
- Mexico, Honduras and Guatemala - Alt 1500 to 2800m - Flowers in Winter to early Spring - Warm grower - Large Mule Ear epiphyte
45. cebolleta [Jacq.]Sw.
- All American tropics, most distributed Oncidium - Alt up to 1700m - Flowers in Winter to Spring - Hot Grower - terete leafed Epiphyte - Mount on cork or tree fern - keep humid - Bright light - year round watering

~celsium A. Rich - See O. bifolium

46. cheirophoroides
- Costa Rica - Flowers in Autumn - minature
47. cheirophorum Rchb.f.
- Panama and Colombia - Alt 2500m - Dwarf epiphyte - Flowers in Autumn
48. chrysodipterum
-? Sanders list
49. chrysomorphum Lindl.
- Colombia
50. chrysops Rchb.f
- Colombia

~chrysorapis - See O. fimbriatum

51. chrysornis
?Sanders list
52. ciliatum Lindl.
- Brazil - Alt 200-1000m - Flowers in Autumn to Winter - Mounted in humid intermediate to warm environment - Indirect light
53. cimiciferum [Rchb.f]Lindl.
- Peru and Ecuador - Alt up to 2300m - Large straggling epiphyte - montane forest

citinum - ?Sanders list - See O. citrinum

54. citrinum Lindl.
- Colombia
55. claesianum
- ?Sanders list
56. clowesii
- Brazil - Flowers in fall - Large epiphyte
57. cocciferum Rchb.f
- Colombia
58. compressicaule
- Equitant
59. concavum
- ?Sanders list
60. concolor Hkr.
- Brazil and N. Argentina - Alt 800-1200m - Flowers in Spring to Summer - minature epiphyte -Mount or pot in tree fern - Cool to intermediate - Bright light - Dry winter rest

~confusum - See O. stenoglossum

61. cornigerum Lindl.
- Brazil and Paraguay - Flowers in Autumn - Minature Epiphyte - Tree fern mount - Semi shade - Intermediate - Drier winter
62. corynephorum
- ?Sanders list
63. costaricense Schltr
- Costa Rica
64. costatum [Lindl.]Beer
- Colombia
65. cosymbephorum
- ?Sanders list
66. crispum Lodd.
- Brazil - Flowers in Summer - Intermediate - Semi shade - Moderate humidity - Drier winter - medium to large epiphyte

~var forbesii Burb. - See O. forbesii

~var grandflorum - See O. enderianum

~var marginatum Hort. - See O. forbesii

67. crista-galli Rchb.f.
- Mexico to Colombia - Alt 800-2500m - Flower in Autumn - Dwarf epiphyte on twigs - Cool grower
68. croseus
- Brazil - Intermediate to cool - Flowers in Summer - Treefern mount - Evenwater year round
69. cruciatum Rchb.f.
- Brazil - Alt 800-1500m - Flowers in Autumn til Winter - Terete Epiphyte - Intermediate to cool - treefern mount - indirect bright light

~cruentum Hort. - See O. reflexum

70. cucullatum Lindl.
- Ecuador and S. Colombia - Flowers in late spring and summer - Medium sized epiphyte

~var dayanum Rchb.f - See O. dayanum

71. cultratum Lindl.
- Colombia
72. cosymbephorum
- ?Sanders list
73. curtum
- Closely related to O. sarcodes, forbesii, and gardneri
74. cycnicolle
-?Sanders list - Colombia
75. dactylopterum Rchb.f
- Colombia
76. dasystyle Rchb.f.
- Brazil - Bright days, cool nights with heavy dew - Flowers in Winter - Intermediate - Moderate shade - Fine medium
77. dayanum Rchb.f.
- Colombia and Ecuador - Medium sized epiphyte - Cool

~decipiens Lindl. - See O. cristi-galli

~delumbe Lindl. - See O.ansiferum

~dentatum Klotzsch - See O. micropogon

~desertorum - See O. guianense

78. detortum
- ?Sanders list - Colombia
79. diceratum Lindl.
- Colombia
80. dichromaticum Rchb.f.
- Costa Rica, Colombia

~dichromum - See O. aureum var bicolor

81. diodon Rchb.f
- Colombia

~digitatum Lindl. - See O. leuchochilum

82. divaricatum Lindl.
- Brazil - Flowers in Spring - Small epiphyte on trunks of large trees - Basket or mounted best to accomodate large pendulous spike - Intermediate - bright light
83. Donianum Bateman ex Loud.
84. durangense
- ?Sanders list

~echinophorum - See O. limminghei

85. edwallii
- Brazil - Flowers in the spring - minature epiphyte

~egertonii [Lindl.]Beer,Prakt.Stud - See Odontoglossum egertonii

86. enderianum Hort.
- Mountains of Southern Brazil - Flowers in Autumn - Intermediate - partial shade - Treefern mount - less water in winter
87. endocharis Rchb.f.
- Mexico, Colombia - Alt 800-2500m - Minature epiphyte - Flowers in Spring or Summer - Cool grower - dry winter rest
88. englerianum Kraenzl
- Colombia
89. ensatum Lindl.
- Mexico to Panama, Pacific coast - Alt up to 1000m
90. estrade
-?Sanders list
91. exalatum Hagsater
- Panama - Alt 800-2500m - Intermediate to Cool
92. examinans Lindl
- Colombia
93. exasperatum Rchb.f
- Colombia
94. exauriculatum Jimenez
- Nicaragua and Costa Rica, Pacific coast- Alt up to 1000m -
95. excavatum Lindl
- Colombia, Ecuador and Peru - Flowers in autumn - Large robust epiphyte or occasional terrestrial
96. falcipetalum Lindl.
- Venezuela to Peru - Alt 2000+m - Flowers in Autumn - Cold grower
97. fallens Rchb.f
- Colombia

~filipes Lindl. - See O.brachyandrum`

98. fimbriatum Lindl.
- Brazil and Paraguay - Flowers in Autumn - Warm to intermediate - Mounted - moderate bright light and good air circulation

~flabelliferum Paxt. - See O. gardneri

99. flavovirens L.O. Wms.
- Mexico - Flowers in Late Autumn to early Winter - small Mule Ear Epiphyte

~flexosum Lindl. - See O. cimiciferum

100. flexuosum Sims
- Brazil, Argentina, Uruguay and Paraguay - Flowers in Autumn to Winter - Intermediate - Medium sized epiphyte - Swamps in humid lowlands -Bright indirect light
101. floridianum Ames
- Alt 0-100m - Flowers in May to August - Epiphyte on trees in Low pinelands and hammocks or a terrestrial
102. forbesii Hkr.
- Brazil - Flowers Early Fall - Epiphyte on trees - Intermediate to Cool grower -moderate bright indirect light - mounted - dry winter after flowering

~forbesio-dasytele Rolfe - See O. gardneri

103. formosissimum Rchb.f
-Colombia

~fulgens Schltr. - See O. obryzatum

~fuscatum Rchb.f - See Miltonia warscewickii -Panama, Colombia, Ecuador and Peru - Flowers In Spring - Intermediate - AKA Miltonia warscewiczii

104. fuscopetalum [Hoehne]Garay - Brazil - Alt-100-500m - Flowers in Winter - Epiphyte along streams and edges of forests - Treefern Mount - Intermediate to warm - moderate light
105. gardneri Lindl.
- Brazil - Flowers in Late summer or fall - Fragrant - Intermediate to Cool grower - Pots with fiberous medium or better yet treefern mounts - Diffuse bright light - Less winter water

var flavum Hort. same as above

~geertianum Morr.- See O. nebulosum

106. ghiesbreghtianum
~ghillanyi Pabst - See O. spilopterum
107. globuliferum H.B.K.
- Peru, Colombia, Venezuela, Costa Rica , and Panama - Alt. 1000-2000m - Flowers in Summer - Minature Creeping Epiphyte - large tree fern raft to accomodate creeping growths with keikis - keep damp
108. glossomystax Rchb.f.
- Mexico, Guatemala and N. South America - Epiphyte

~godseffianum - See O. fimbriatum

109. gracile Lindl.
- Brazil, Minas gerais - Alt 500-1000m - Flowers yearround - Terrestrial in sandy soil or in crevasses of stone - Pot with chunks of treefern - Intermediate - moderate light - Plenty of water in growth

~gracilforme C.Schweinf. - See O. obryzatum

110. graminifolium Lindl.
- Mexico to Costa Rica - Alt 1500-2500m - Flowers in Winter - Terrrestrial on clay streambanks or steep hillsides in open forest
111. grandiflorum Rchb.f
- Colombia
112. gravesianum
- Mexico and Panama - Flowers in Autumn - Intermediate
113. guantletii
- Jamaica - Flowers from Sept til Apr. - Equitant epiphyte - Tree fern or hard wood mount - Medium shade

~guatemalense - See O. oliganthum

114. guianense
- Dominican Republic and Haiti - Flowers in autumn - Equitant epiphyte
115. guibertianum
-?Sanders list

~guttatum [L.]Rchb.f. - See O. luridum

116. guttulatum Rchb.f.
- Nicaragua and Costa Rica -
117. gyriferum
- Colombia and Ecuador - Flowers in Autumn - Alt 1500+m - Vining epiphyte
118. haematochilum Lindl.
- Colombia and Trinidad - Natural hybrid between O. luridum and O. lanceanum -

~haematochrysum Rchb.f. - See O. flexuosum

~haematoxanthum Rchb.f. - See O. flexuosum

119. haitense
- ?Sanders list
120. halteratum Lindl.
- Colombia
121. haplotyle Schltr.
- Colombia
122. harrisonianum Lindl.
- Brazil - Alt up to 1000m - Flowers in Summer to Autumn - Tree fern mounts- Intermediate to cool - Drier winter - Dwarf Epiphyte
123. hartwegii Lindl.
- Colombia
124. hastatum Lindl.
- Mexico and Colombia- Alt 1000-2000m - Flowers in Spring and Summer - Epiphyte in Oak forest
125. hastalabium [Lindl.]Garay & Dunsterv.
- Colombia - Alt 600-800m - Creeping epiphyte - Warm to cool - Flowers in March to May

~hecatanthum - See O. fimbriatum

126. henekenii
- Dominican Republic and Haiti - Flowers in Summer - fanlike epiphyte - interesting bee or spider shaped flower - Inflorescences grow with time and add new flowers to end - Don't cut spike until sure that it is dead, can bloom for up to 15 months on an inflorescence - best grown on a stick in bright light - daily mistings, does not like waterings
127. heteranthum Poepp & Endl.
- Costa Rica , Panama, Venezeula, Colombia, Ecuador, Bolivia, and Peru - Alt 200-2300m - Flowers in Autumn - Small Epiphyte in montane forest - Cool - prefers shade - Only the last buds on an inflorescence actualy become flowers, the others appear as small stars
128. hians Lindl.
- Brazil, Minas Gerais - Alt up to 1000m - Flowers in Late Spring to Summer - Minature epiphyte - Small treefern mount - Intermediate to cool - Moderate shade - water even year round
129. hoppii Schltr.
-Colombia
130. hookeri Rolfe
- Brazil - Flowers in Autumn to Winter - Small pendant epiphyte - Intermediate to cool - Moderate shade - treefern mount - drier winter

~hrubyanum - See O. lietzei

131. hydrophyllum Barbosa Rodrigues
- Brazil -Terrestrial in hummus filled rock crevasses and sandy soil - Intermediate - Moderate light - Treefern in pots
132. incurvum Barker ex Lindl.
- Mexico - Alt 1200-1500m - Flowers in Summer and Fall - cool

var album - Pure White form

133. intermedium
- ?Sanders list

~ionops Cogn. & Rolfe - See O. heteranthum

~iridifolium Lindl. -See O. crista-galli

134. isthmii Schltr
- Costa Rica and Panama, Pacific coast - Alt 0-500m -

~janeirnse Rchb.f. - See O. longipes

135. jimenezii
- ?Sanders list
136. johannis Schltr.
- Guatemala - Alt up to 1350m - Epiphyte or lithophyte on rocks in woods -
137. jonesianum Rchb.f.
- Brazil, Uruguay and Paraguay - Alt 0-500m - Flowers in Autumn - Erect or pendant terete epiphyte - Riverine Forest - Bright light - dry climate - Mounted on cork

~juncifolium - See O. cebolleta

138. karwinskii
- Mexico - Flowers in Spring
139. kienastianum Rchb.f
- Colombia
140. klotzschianum Rchb.f
- Costa Rica, Panama and Colombia -

~kramerianum Rchb.f - See Psychopsis Kramerianum - Colombia, Ecuador, Panama, And Costa Rica - Epiphyte - Warm to hat grower - Freeflowering

~kymatoides Kraenz. - See O. carthagenense

141. laeve
- Mexico and Central America - Flowers in Spring - Large epiphyte
142. lamelligerum
- Ecuador - Flowers in Summer and autumn - High elevation - cool
143. lanceanum Lindl.
- Brazil, Guyana, Surinam, French Guiana, Colombia, Venezuela and Trinidad - Flowers in March to May - Hot grower - Mule Ear Epiphyte or Lithophyte - Cork mount - moderate shade -year round water

~lankesteri Ames - See O. ansiferum

144. leaneri
- Brazil - Flowers in Autumn - Intermediate
145. leiboldii
-?Sanders list
146. leitzii
-?Sanders list
147. lemonianum
- Equitant epiphyte
148. lentiginosum Rchb.f
- Colombia
149. leopoldianum Rolfe
- Colombia
150. leuchochilum Lindl.
- Mexico, Guatemala and Honduras - Alt 500-2000m - Flowers in Spring - large epiphyte in wooded montane forest

~leucostomum - See O. hians

151. Oncidium liebmannii 'Trident' CHM/AOS.
Photo and award winning plant courtesy of Wilford Neptune.
152. lietzii Regel
- Colombia, Brazil and Paraguay - Flowers in Autumn - Mounted on treefern slab - Intermediate - Semi shade - Drying out between watering otherwise steady
153. limminghei Morren ex Lindl.
- Venezuela and Brazil, Rio state - Flowers in Summer and Autumn - Cork mount - moderate light - Intermediate to warm - humid conditions
154. lindenii Brongniart
- Mexico, Belize and Honduras -
155. linguiforme Lindl.
- Colombia
156. loefgrenii Cogn.
- Southern Brazil - Flowers in Autumn to Winter - Small epiphyte - Mounted - Moderate to heavy shade - Intermediate humid conditions - Drier winter
157. longicornu Mutel
- Brazil -

~longifolium - See O. cebolleta

158. longipes Lindl. & Paxt.
- Brazil - Flowers in Summer to Autumn - Intermediate - Small epiphyte on trees near rivers - Treefern mount - Bright indirect light - drier winter
159. X Lowii Rolfe
- natural hybrid between O. cavendishianum and O.carthagenense
160. lucasianum
-?Sanders list
161. lucayanum
-?Sanders list
162. lucescens Rchb.f
- Colombia
163. ludens Rchb.f
- Colombia
164. luridum Lindl.
- Florida, Mexico through Peru and the West Indies - Alt 0-1500m - Flowers in Summer to early Autumn - Large mule ear epiphyte of lowland Pastures and open forests or lithophyte - Regular watering year round but dry between waterings

~luteum - See O. cheirophoroides

165. luteum Rolfe
- Costa Rica and Panama - Alt 800-2500m - Intermediate to cool
166. macranthum Lindl.
- Colombia, Ecuador and Peru - Alt 2000+m - Flowers in Summer to Autumn - Cool grower
167. macronix Rchb.f.
- Brazil, Paraguay and Argentina - Alt 200-1500m - Intermediate to Cool - Flowers in Autumn - Treefern mount - Moderate light - Drier winter
168. macropetalum Lindl.
- Brazil, Paraguay and Bolivia - Alt up to 1000m - Flowers in Winter - Warm to intermediate - Epiphyte in hot lowland savannah - Moderate light - Drier winter after flowering - needs to be kept on the moist side does not like to be completely dry

~var fuscopetalum - See O. fuscopetalum

169. macropus Linden. & Rchb.f
- Colombia
170. maculatum Lindl.
-Mexico, El Salvador, Guatemala and Honduras - Alt 1100-2000m - Flowers in Early Spring -
171. magdalenae Rchb.f
- Colombia
172. maizaefolium Lindl.
- Colombia
173. marshallianum Rchb.f.
- Brazil - Flowers in Spring - Epiphyte - Cool

~massangei C. Morr. - See O. sphacelatum

~maxilligerum - See O. hians

~megalous Schltr. - See O. heteranthus

174. meirax
- Greater Antilles, Colombia,Ecuador, Peru, and Venezuela - flowers in Spring - Small epiphyte
175. melanops Rchb.f
- Colombia

~mellifluum - See O. Loefgrenii

176. mendax Rchb.f
-Colombia
177. mentigerum [Rchb.f] Lindl.
- Colombia
178. metalicum Rchb.f
- Colombia
179. micropogon Rchb.f.
- Brazil -
180. microchilum Batem. ex Lindl.
- Mexico, El Salvador and Guatemala - Alt 600-2300m - Flowers in midsummer - terrestrial on rocks and lava flows

~microglossum Klotzsch - See O. barbatum

181. micropogon Rchb.f.
- Brazil - Alt 200-1000m - Flowers in Summer to Autumn - Epiphyte on riverside trees - Intermediate - Moderate light - Treefern mount - High humidity
182. millianum Rchb.f
- Colombia
183. mimeticum Stacy
- Colombia - Cold
184. miserrimum Rchb.f
- Colombia
185. moirianum
-?Sanders list
186. monachicum Rchb.f.
- Colombia and Ecuador - Flowers in Late summer - Epiphytic - Cool

~monoceras Hkr. - See O. longicornu

187. montanum
- Sanders list
188. morenoi
- Brazil & Bolivia - Flowers in spring to Summer - Small Mule Ear Epiphyte
189. multiflorum
- ?Sanders list
190. murinum Rchb.f
- Colombia
191. nanum Lindl.
- Guyana, Venezuela, Peru and Brazil - Alt 0-100m - Flowers in Summer to Fall - Small mule ear epiphyte in lowland forest

~naranjense Schltr. - See O. ansiferum

192. nebulosum Lindl.
- Mexico and Guatemala - Alt up to 2100m - Epiphyte in dry forests
193. nigratum Lindl.
- Colombia
194. nubigenum Lindl.
- Peru, Ecuador and Colombia - Alt 1000-3000m - Flowers in Spring and Summer - Fragrant - Intermediate - Small epiphyte
195. nudum Batem.
- Panama and South America - alt up to 1000m
196. oblongatum Lindl.
- Mexico and Guatemala - Alt 1500-2100m - Compact Epiphyte in Dry forest

~obryzatoides Kraenzl. - See O. obryzatum

197. obryzatum Rchb.f.
- Venezuela, Colombia, Ecuador, Peru, Costa Rica and Panama - Flowers in Fall - Warm - Minature epiphyte
198. ochmaochilum Rchb.f.
- American tropics - Alt up to 1000m - epiphyte - Warm to hot grower
199. oestlundianum L.O.Wms.
- Coastal Pacific Mexico - Alt 0-1000m - Flowers in Late Spring to Summer - Small mule ear epiphyte on mangrove, wooded roadsides or lithophytic on barren lava flows -
200. oliganthum [Rchb.f.] L.O.Wms.
- Mexico and Guatemala - Alt up to 2000m - epiphyte
201. olivaceum H.B.K.
- Colombia - Cold - small epiphyte
202. onustum Lindl.
- Colombia, Ecuador and Peru - Epiphyte in dry climate and sometimes found on cacti - Flowers in March til Sept - Warm to Hot - water while in growth and stop as growth slows until a new growth is seen
203. orbatum Kraenzl
- Colombia
204. orgyale Rchb.f.& Warscewiczii
- Colombia and Venezuela - Epiphytic and semi terrestrial - Intermediate to warm - Freeflowering
205. orinthocephalum Lindl.
- Colombia
206. orinthopodium Rchb.f
- Colombia
207. orinthorhynchum H.B.K.
- Mexico, Guatemala, El Salvador and Costa Rica - Alt up to 1700m - Flowers in Autumn to Winter - Fragrant - Intermediate to cool - Small epiphyte in humid forest
208. orthotis Rchb.f.
- Colombia - Warm

~ottonis - See O. concolor

~oxyacanthosum - See O. longipes

~pachyphyllum Hkr. - See O. cavendishiannum

209. paleatum Schltr.
- Nicaragua and Costa Rica - Alt 800-2500m

~pallidum Lindl. - See O. harrisonianum

210. panamense Schltr.
- Panama lowlands - Alt up to 500m
211. panduratum Rolfe
- Colombia
212. panduriforme Ames & C. Schweinf.
- Panama - Alt 800-2500m - Intermediate to cool

~pantherinum Hoffmansegg - See O. harrisonianum

~papilio - See Psychopsis papilio

213. paranapiacabense
-?Sanders list
214. paranense
- Brazil - Closely related to O. raniferum, hookeri, and loefgrenii
215. pardoglossum Rchb.f
-Colombia
216. parviflorum L.O.Wms.
- Panama - Alt 800-2500m - Intermediate
217. pectorale
- ?Sanders list

~pelicanum Lindl. - See O. reflexum

218. peliogramma Linden & Rchb.f.
- Costa Rica And Panama
219. pentadactylon Lindl.
- Western Ecuador and Peru -
220. pergameneum Lindl.
- Nicaragua and Costa Rica
221. phalenopsis Linden & Rchb.f.
Ecuador - Flowers in Winter and Spring - Intermediate to Cool grower - Small epiphyte ~

var brantiae Hort. - See O. dayanum

~phantasmaticum - See O. cruciatum

222. phylloglossum Rchb.f
- Colombia
223. phymatochilum Lindl.
- Mexico, Guatemala and Brazil - Alt 500-1300m - Flowers in Spring and Summer - Intermediate - mounted on tree fern or hard wood - Moderate bright light - Even year round water - Short erect epiphyte
224. pictum Rchb.f
- Colombia
225. picturatum Rchb.f
- ?Sanders list - Colombia
226. pirarense
- ?Sanders list

~pittieri Schltr. - See O. cheirophoroides

227. plagianthum Rchb.f
- Colombia
228. planilabre Lindl.
- Nicaragua to Peru - Alt 800-2500m - Cool
229. platychilum Schltr.
- Colombia
230. platyglossum Rchb.f
- Colombia
231. porrigens Rchb.f
- Colombia
232. powellii Schltr.
- Panama - Alt up to 1000m - Warm to intermediate

~praetextum Mort. - See O. gardneri

233. prionochilum
- ?Sanders list
234. pubes Lindl.
-Colombia, Brazil [ Rio de Janeiro and Minas Gerais states] and Paraguay - Flowers in Autumn - Intermediate - Moderate light - Treefern mount - Epiphyte

~var flavescens - See O. cornigerum

~pubescens Ducharte - See O. pubes

235. pulchellum Hkr.
- Jamaica and Hispanola - Flowers from May til June - Equitant epiphyte on tree twigs - extensively used in equitant Oncidium hybrids
236. pulvinatum Lindl.
- Brazil - Compact epiphyte - Treefern mount - Intermediate to cool - Moderate light - drier winter
237. pumilum Lindl.
- Brazil and Paraguay - Alt 200-1000m - Flowers in summer to fall - Warm to intermediate - Bright light - Cork mount - Water even year round - Small Mule Ear epiphyte
238. X punctatum
- natural hybrid between O. forbesii and O. gardneri

~pusillum Rchb.f - See Psygmorchis pusilla

~pygmaeum [Lindl.]Beer. - See Leochilus pygmaeus

239. pyramidale Lindl.
- Colombia
240. pyxidophorum Rchb.f
- Colombia

~quadricorne - See O. hians

241. quadrilobum
-?Sanders list
242. raniferum Lindl.
- Eastern Brazil [Rio de Janeiro and Pernambuco states] - Intermediate to cool - Treefern mount - Moderate shade - drier winter but don,t let it dry out completly - Small to medium epiphyte

~var majus - See O. hookeri

243. reflexum Lindl.
- Mexico and Guatemala, Colombia - Medium epiphyte
244. reichenbachii Lindl.
- Colombia
245. reichenheimii
- Mexico and Central America - Flowers in spring - large epiphyte
246. reisii
- Brazil - Flowers in Autumn - Small epiphyte

~retemyerianum Rchb.f. - See O. lindenii

247. rhodostictum Kraenzl.
- Colombia

~rigbyanum Paxt. - See O. sarcodes

248. rio grandense
- Brazil - Flowers in Summer - Cool to Intermediate - Related to O. lietzei
249. rostrans Rchb.f
- Colombia
250. robustissimum Rchb.f.
- Brazil - closely related to O. divaricatum
251. rostratum [Schltr]Garay
- Colombia - epiphytic - Very Cold
252. rotundatum Kraenzl.
- Colombia
253. rupestre
- ?Sanders list

~saint-legerianum Rolfe - See O. spilopterum

254. saltabundum Rchb.f
- Colombia
255. sanderae
- ?Sanders list
256. sanguinolentum [Lindl.]Schltr.
- Colombia - Cold
257. sarcodes Lindl.
- Brazil - Flowers in Spring - Intermediate to warm - Humid - Semi shade- Drier winter - epiphyte on trees
258. sawyeri
- ?Sanders list
259. saxicolum Schltr
- Colombia

~scancor Rchb.f - See O. globuliferum

~scansor Rchb.f - See O. globuliferum

260. scandens
- ?Sanders list
261. schillerianum Rchb.f
- ?Sanders list
262. schroederianum [Rchb.f] Garay & Stacy
- Brazil - Flowers from Winter to Spring - large epiphyte
263. schwambachii [?]
- Brazil - Intermediate - Cork mounts - Dry out between waterings - Drier winter - Bright light

~scurius - See O. pulvinatum

264. serpens Lindl.
- Colombia - Warm to intermediate
265. serratum Lindl.
-?Sanders list - Colombia
266. sessile Lindl. & Pax
- Colombia
267. simulans [Schltr]
- Colombia
268. spathulatum
- Small epiphyte
269. sphacelatum Lindl.
- Mexico to El Salvador - Flowers in Winter to Spring - Intermediate - Epiphyte on trees in thickets and forests and lithophytic on mossy rocks -
270. sphegiferum Lindl.
- Brazil - Flowers in summer through winter - Treefern mount - Intermediate - Semi shaded - Drier winter
271. spilopterum Lindl.
- Brazil, Peru and Paraguay - Flowers in the Fall - Alt 800m - Semi terestrial in sandt rock crevasses - Intermediate to cool - Bright indirect light - Dry winter -

var album Hort. - See above

272. splendidum Duchartre
- Guatemala and Honduras - Flowers in Late Winter to early Summer - Warm - Large Mule Ear epiphyte - Rare
273. sprucei
-?Sanders list
274. stacyi Garay
- Bolivia -
275. stelligerum Rchb.f.
- Mexico - Flowers in Spring or early Summer -

var ernesti B.S.Wms. - Mexico

276. stenoglossum [Schltr]Dressler & N.H.Wms.
- Nicaragua and Costa Rica - Alt 800-2500m - Flowers in autumn - Intermediate to Cool
277. stenotis Rchb.f.
- Nicaragua to Ecuador - Alt 800-2500m
278. stipitatum Lindl.
- Colombia, Panama, Honduras and Nicaragua - Flowers in Summer - Warm - Terete pendant epiphyte - Likes it dry
279. storkii Ames & Schweinf.
- Costa Rica - Alt 800-2500m -
280. stramineum Lindl
- Mexico - Alt 1000m - Flowers in Midwinter to late Spring - Small Mule Ear Epiphyte - Warm to intermediate

~suave Lindl. - See O. reflexum

281. superbiens Rchb.f.
- Colombia - Cool grower - Freeflowering - Epiphyte and Semi terrestrial
282. suttoni Batem. ex Lindl.
- Guatemala - Alt up to 1400m - Epiphyte on trees
283. sylvestre
- ?Sanders list
284. tectum Rchb.f
- Colombia
285. tenense Rchb.f
- Colombia

~tenue Lindl. - See O. wentwortianum

~ var grandiflorum Lindl. - See O. ansiferum

286. tenuipes Kranzl.
- Guatemala -
287. teres Ames & Schweinf.
- Honduras to Panama - flowers in Winter to Spring - Warm Terete leafed epiphyte
288. tetracopis Rchb.f
- Colombia
289. tetrakelidion Kraenzl.?
- Costa Rica - Could be synonym of O. obryzatum
290. tetrapetalum
- Jamaica - Flowers year round - equitant epiphyte - Bright light - slab or pot culture
291. tetrotis Rchb.f
- Colombia
292. tigratum Rchb.f
- ?Sanders list - Colombia
293. tigrinum La Llave & Lex.
- Mexico - Alt 2000-2500m - Flowers in Autumn - Large free flowering epiphyte on oak trees - Cold
294. titania Schltr.
- Guatemala and Costa Rica - Alt up to 900m - Epiphyte in tree thickets - minature Fan
295. trifurcatum Lindl.
- Colombia, Ecuador and Peru - Epiphyte - Cool
296. triquetrum [Sw.]R. Br.
- Jamaica - Flowers in Autumn - Equitant epiphyte - Tree fern mount or small pot - well shaded - Short lived, 5 years tops
297. tripterygium
- Small epiphyte
298. trulla Rchb.f
- Colombia
299. trulliferum Lindl.
- Brazil - Alt 200-1000m - Intermediate to warm - Treefern mount - Bright indirect light - drier winter -

var album Hort. - See above

300. turialbae Schltr.
- Costa Rica
301. turpe Rchb.f
- Colombia
302. umbrosum [rchb.f]Rchb.f
- Colombia

~unguiculatum Klotzsch - See O. concolor

~unguiculatum Lindl. - See O. tigrinum

~unicorne Lindl. - See O. longicornu

303. uniflorum
- Brazil - Flowers in Summer to Fall - Wood mount - Small epiphyte
304. ustslatum Rchb.f
- Colombia
305. urophyllum Lodd.
- West Indies and Brazil - equitant

~varians Schltr - See O. obryzatum

306. varicosum Lindl. ex Paxt.
- Bolivia, Brazil and Paraguay - Flowers in Winter and Spring - Warm grower

var rogersii - Brazil - Flowers in Winter and Spring

307. varigatum Sw.
-Florida, Cuba, Virgin Is, Puerto Rico and Hispanola - Dwarf equitant epiphyte - Flowers in November to June - Forests, thickets and among saw palmetto
308. velutinum
- ?Sanders list - Cuba - Equitant epiphyte
309. ventilabrum - ?Sanders list
310. vernixium Linden & Rchb.f.
- Ecuador -

~verrucosum [Lindl]Rchb.f. - See Brassia verrucosa

311. versteegianum
-?Sanders list

~vexillarium Rchb.f. - See O. bifolium

312. viperianum
- Uruguay, Paraguay, Brazil and Argentina - Flowers at any time - Small epiphyte -
313. viperinum
?Sanders list
314. virgulatum Rchb.f.
- Colombia
315. warscewiczii Rchb.f.
- Costa Rica and Panama - Alt 1000-2000m -
316. waluweva Rolfe
- Brazil and Paraguay - Flowers in Autumn to Winter - Small epiphyte - Flower mimics an ant - pendant inflorescence -
317. warmingii
- Brazil - Semi-terrestrial - Intermediate to cool
318. wentworthianum Lindl.
- Mexico, Guatemala, Nicaragua and Costa Rica - Alt 800-1500m - Flowers in Summer to Autumn - Intermediate - Large epiphyte in humid forest - Rare

var tenue Lindl. -

~werklei Schltr. - See O. globuliferum

319. werneri Schltr.
_ Colombia
320. wydleri
- Sanders list
321. xanthocentrum Rchb.f
- Colombia
322. xanthodon Rchb.f
- ?Sanders list - Colombia
323. xanthonis Rchb.f ex Linden
- Colombia
324. zebrinum Rchb.f
- ?Sanders list - Colombia

~zonatus - See O. heteranthum

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