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Orchid Species: Oncidium rhinoceros

Kew currently accepted name is Gomesa longicornu

Oncidium rhinoceros is an orchid species identified by Rchb.f. in 1856. Culture information and photos for this orchid are commonly detailed under the currently accepted name of Gomesa longicornu.
Oncidium (Onc.)
ORIGIN: Found in Minas Gerais, Rio de Janeiro, Sao Paulo, Parana, Santa Catarina and Rio Grande do Sul states of Brazil in the southeast Atlantic forest at elevations of 500 to 1800 meters, in shaded and humid places.

DESCRIPTION: Small sized, warm to cool growing epiphyte with clustered, oblong-conical, slightly compressed, ridged pseudobulbs carrying 1 or 2 apical, erect, rigid, oblong to oblong-ligulate, subacute leaves that are deep green above and paler below and blooms in the spring, summer and fall on a basal, 10 to 18 [25 to 45 cm] long, paniculate inflorescence with 6 to 10, spreading, subdistichous, slender branches carrying 7 to 20 flowers each, all held in the apical half and having membraneous floral bracts.

FLOWER SIZE: 2/5 inch [1 cm] -- information provided by Jay Pfahl, author of the Internet Orchid Species Encyclopedia (IOSPE).
Other Names
Genus Name Genus Grex Name Year Author
Add+ Gomesa Gom longicornu 2009 (Mutel) M.W.Chase & N.H.Williams
Add+ Oncidium Onc gautieri 1869 Regel
Add+ Oncidium Onc macronix
Add+ Oncidium Onc monoceras 1841 Hook.
Add+ Oncidium Onc unicorne 1839 Lindl.
Add+ Oncidium Onc unicornutum 1838 Knowles & Westc.
Add+ Rhinocerotidium Rhinocerotidium rhinoceros 2006 (Rchb.f.) Szlach.
Add+ Oncidium Onc longicornu 1838 Mutel
Add+ Rhinocidium Rhc longicornu 2006 (Mutel) Baptista
Add+ Rhinocerotidium Rhinocerotidium longicornu 2006 (Mutel) Szlach.
Add+ Coppensia Cpp longicornu 2010 (Mutel) F.Barros & V.T.Rodrigues
Add+ Gomesa Gom rhinoceros 2009 (Rchb.f.) M.W.Chase & N.H.Williams
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Growing with Orchids: 71 Articles by Ken Slump Added to ORCHIDS.ORG

Author is Sys Admin, posted 3 months ago The International Orchid Foundation is happy to announce the publishing of 71 articles written by Ken Slump, long time orchid grower and judge.  The content contains a weath of information, especia... Read More

Easy Orchids

Author is Ken Slump, posted 3 months ago Suggestions for Choosing Plants Requiring Minimal Care THIS SEEMS LIKE AN IDEAL TOPIC for an article. Many of us want to enjoy orchid flowers with a minimum of fuss and I have found that most ... Read More

Beginners Start Here

Author is Ken Slump, posted 6 months ago A 12-Step Plan for Becoming a Successful Orchid Grower IF YOU ARE NEW TO THE ORCHID hobby and perhaps feel you are not enjoying the success with your plants that you had hoped for, read throug... Read More

Flower Boosters

Author is Roy Tokunaga, posted 7 months ago Flower Boosters  Florida 2018 by Roy Tokunaga   Email:  [email protected]   Definition:  Anything that will empower my Orchid to spike more reliably with maximum flowers.   It can be cultu... Read More


  1. Growing with Orchids: 71 Articles by Ken Slump Added to ORCHIDS.ORG

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  1. Pam Alexander asked question How to repot a Mattie Shave in category General Discussion
  2. Rae Walker asked question Name help in category General Discussion
  3. John Small asked question Schomburgkia, species or hybrid in category General Discussion
  4. Robert H. Findlay asked question Help with ID of this Eria sp. in category General Discussion
  5. Osura Mindula Gunasena asked question Help to Identify the Id of this Vanda in category General Discussion

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  1. Carol Holdren commented on topic "How to repot a Mattie Shave" by Pam Alexander
  2. Frank Cambas commented on member plant Zns. Cynosure var. Blue birds by Ben MG
  3. Robert H. Findlay commented on topic "Lady Bug or dangerous bug" by John Small
  4. Robert H. Findlay commented on topic "Help with ID of this Eria sp." by Robert H. Findlay
  5. Carol Holdren commented on topic "Name help" by Rae Walker
  6. Carol Holdren commented on member plant Dtps. Younghome Little Spirit by Heather A
  7. Sara D commented on member plant Den. Green Mist by Sara D
  8. Sara D commented on member plant Phal. bellina var. Coerulea by Sara D
  9. Sara D commented on member plant Pot. Marie Yellow Bird var. Love Love by Sara D
  10. Carol Holdren commented on topic "Help to Identify the Id of this Vanda" by Osura Mindula Gunasena
  11. Carol Holdren commented on topic "Care for Myl Quest Fanguito " by Maricarmen Ferreira
  12. Roberto Lizama commented on topic "Help to idenficate this orchid" by Roberto Lizama
  13. Mark Ashworth commented on topic "Orchid species search" by Mark Ashworth
  14. Debbie Chase commented on topic "Head on Shot to be Identified" by Debbie Chase
  15. Carol Holdren commented on member plant Phal. Liu's Cute Angel by Mo Chen
  16. Mo Chen commented on member plant Holc. flavescens by Mo Chen
  17. Carol Holdren commented on topic "Identify Orchid" by Debbie Chase
  18. Nilda Vega commented on member plant Bct. Roman Holiday 'Hamlyn' by Terence Kew
  19. Clint Dalrymple commented on member plant Pnr. graminifolia by Clint Dalrymple
  20. Carol Holdren commented on member plant Rth. Beau's Golden Touch 'Touch of Class' by Robert Rand