Oncidium

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Oncidium
Oncidium altissimum (Jacq.) Sw. - Curtis v. 57 (1830) pl. 2990.jpg
Oncidium altissimum
Scientific classification e
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Epidendroideae
Tribe: Cymbidieae
Subtribe: Oncidiinae
Genus: Oncidium
Sw.
Type species
Oncidium altissimum
(Jacq.) Sw., 1800
Synonyms[1]
  • Chamaeleorchis Senghas & Lückel in F.R.R.Schlechter
  • Cochlioda Lindl.
  • Collare-stuartense Senghas & Bockemühl
  • Heteranthocidium Szlach., Mytnik & Romowicz
  • Matalbatzia Archila
  • Mexicoa Garay
  • Miltoniastrum (Rchb.f.) Lindl.
  • Miltonioides Brieger & Lückel
  • Odontoglossum Kunth in F.W.H.von Humboldt, A.J.A.Bonpland & C.S.Kunth
  • Petalocentrum Schltr.
  • Roezliella Schltr.
  • Sigmatostalix Rchb.f.
  • Solenidiopsis Senghas
  • Symphyglossum Schltr.
  • Xeilyathum Raf.

Oncidium, abbreviated as Onc. in the horticultural trade,[2] is a genus that contains about 330 species of orchids from the subtribe Oncidiinae of the orchid family (Orchidaceae). As presently conceived (May 2014), it is distributed across much of South America, Central America, Mexico and the West Indies, with one species (O. ensatum) extending into Florida.[1][3] Common names for plants in this genus include dancing-lady orchid[4] and golden shower orchid.

In 2008, Oxfords Annals of Botany labeled the Oncidium alliance "grossly polyphyletic."[5] The American Orchid Society labeled this genus a "dumping ground."[6] After DNA testing and much debate, a consensus was announced (April 2013)[7] resulting in major taxonomic changes to Oncidium, Gomesa, Odontoglossum, Miltonia, and others. Much of this debate and subsequent housekeeping was initiated by significant research for the scientific publication Genera Orchidacearum Volume 5.[8] As a result, much of the information in this article is now deprecated, but still of great value. One significant change is the move of most Brazilian Oncidium with a fused lateral sepal to the genus Gomesa.[6][5] The Royal Horticultural Society system, the World Checklist of Monocots database[9] and the American Orchid Society have already updated their databases to reflect most of these changes.

Description[]

This genus was first described by Olof Swartz in 1800 with the orchid Oncidium altissimum, which has become the type species. Its name is derived from the Greek word ὀγκος, onkos, meaning "swelling". This refers to the callus at the lower lip.

Most species in the genus are epiphytes (growing on other plants), although some are lithophytes (growing on rocks) or terrestrials (growing in soil). They are widespread from northern Mexico, the Caribbean, and some parts of South Florida to South America. They usually occur in seasonally dry areas.

They can be divided into three categories, according to their growth pattern:

  • Some have green pseudobulbs and long racemes with small flowers and a dominant lip. They are mostly golden yellow with or without reddish-brown barring, but some are brown or yellowish-brown. Other Oncidium species have white and pink blooms, while some even have startling, deep red colors in their flowers.
  • Another group has extremely small pseudobulbs and stiff, erect, solitary leaves. These cylindrical leaves act as a water reserve. They have long racemes with yellow flowers that seem to fan out at the top. Sizes of these orchids can vary from miniature plants of a couple of centimetres to giants with 30 cm-long leaves and racemes of more than one metre long. These species, known as the Mule-Ears, are now classed as Psychopsis.
  • Formerly there was a third group, called the Variegata or equitant oncidiums. They have no pseudobulbs, giving fan-shaped shoots of less than 15 cm, with triangular section leaves. These oval, broad and spongy leaves act as storage organs. Their flowers are most complicated with exquisite colors. The sepals are somewhat fleshy. The petals and the lip are membranaceous. These orchids are now classified as Tolumnia. Cyrtochilum is another genus that many Oncidium species have recently been reclassified into; Cyrtochilum species have extremely long, winding inflorescences that can sometimes reach 20' or more, curled petals that result in three-pointed blooms, and rambling growth habits in which each new pseudobulb appears on top of the old one.

Oncidium species are characterised by the following properties :

  • presence of column wings,
  • presence of a complicated callus on the lip (this can be used to separate the taxa),
  • pseudobulbs with one to three leaves,
  • several basal bracts at the base of the pseudobulbs.

The flowers come in shades of yellow, red, white and pink. The petals are often ruffled on the edges, as is the lip. The lip is enormous, partially blocking the small petals and sepals.

Some Oncidium orchids are very long : Oncidum altissimum and Oncidium baueri can grow to a height of 5 m, while Oncidum sarcodes can reach 3 m.

They are known as 'spray orchids' among some florists. They are very varied and are easily hybridised with Odontoglossum. Together with other closely related genera (Miltonia, Cuitlauzina, Miltoniopsis, Osmoglossum, Leochilus, Comparettia, Cyrtochilum, Odontoglossum, Tolumnia, Rhynchostele [formerly Lemboglossum], Psychopsis, etc.) they form the Oncidium alliance. Some of the best Oncidium alliance hybrids originate from Oncidium tigrinum and Oncidium incurvum, when crossed with Odontoglossums, although hybridization possibilities of this group of orchids are endless, and there are literally hundreds of thousands of excellent hybrids in the Oncidium alliance.

Oncidium brunleesianum
Oncidium incurvum - another view
Florida orchid (Oncidium floridanum)
Oncidium
Orchid, Oncidium. "Hilo Firecracker"

Selected species[]

  • (Brazil - Paraná).
  • (Venezuela to Ecuador).
  • (Colombia to Ecuador).
  • (Ecuador to Peru).
  • Oncidium acrochordonia (Colombia).
  • (Colombia).
  • Oncidium advena (N. Venezuela).
  • (Brazil - Paraná).
  • (Colombia).
  • (Panama).
  • (Ecuador).
  • Oncidium altissimum : "Wydler's dancing-lady orchid" (Jamaica).
  • (Brazil).
  • Oncidium amictum (SE. Brazil).
  • (Mexico).
  • Lindl. (Panama) (now a synonym of the accepted name Chelyorchis ampliata (Lindl.) Dressler & N.H.Williams in G.A.Romero & G.Carnevali, 2000 )
  • (Ecuador to Peru).
  • Oncidium andreae (Colombia).
  • Oncidium andreanum (SW. Mexico).
  • (Peru).
  • (O. haitiense × O. variegatum) (Dominican Republic).
  • (Colombia).
  • (C. America to Colombia).
  • (Colombia to Ecuador).
  • (Colombia).
  • (Peru).
  • (Dominican Republic) (now synonym of Tolumnia arizajuliana)
  • Oncidium armillare (W. South America to N. Venezuela).
  • (Peru).
  • Oncidium auricula (SE. Brazil).
  • Oncidium auriferum (Colombia to NW. Venezuela).
  • Oncidium aurorae (Peru).
  • (Peru).
  • (Venezuela).
  • (Cogn.) Schltr (NE Brasil)
  • (Brazil - Minas Gerais).
Wydler's dancing-lady orchid (Oncidium altissimum)
Oncidium croesus
  • (Costa Rica to Panama).
  • Oncidium buchtienii (Bolivia).
  • Königer (Ecuador)
  • (Ecuador to Peru).
  • Oncidium callistum (Colombia).
  • (Cayman Is., Cuba, Dominican Republic) (now synonym of Tolumnia calochila)
  • (N. Venezuela).
  • (Mexico).
  • (O. cornigerum × O. riograndense) (S. Brazil).
  • (Colombia).
  • Oncidium cebolleta (Mexico to Brazil) (synonym of the accepted name : (Jacq.) M.W.Chase & N.H.Williams, 2001
  • (Brazil - Goiás).
  • Oncidium cheirophorum (Mexico - Chiapas to Colombia).
  • (Colombia to N. Venezuela).
  • (Mexico - Guerrero, Oaxaca).
  • (Brazil).
  • (WC. Brazil to Bolivia).
  • Oncidium chrysothyrsus (SE. Brazil)
  • Oncidium ciliatum (SE. Brazil).
Oncidium flexuosum
  • Oncidium citrinum (Trinidad to Venezuela).
  • (SE. Brazil).
  • (SE. Brazil).
  • (Brazil - Espírito Santo) (now synonym of Carria colorata (Königer & J.G.Weinm.bis) V.P.Castro & K.G.Lacerda 2005)
  • (Haiti) (now synonym of Tolumnia compressicaulis)
  • Oncidium concolor (Brazil to NE. Argentina).
  • Oncidium cornigerum (SE. & S. Brazil to Paraguay).
  • (Peru).
  • Oncidium crispum (SE. Brazil).
  • (Brazil to Ecuador).
  • Oncidium croesus (Brazil - Rio de Janeiro).
  • (Peru).
  • (Ecuador).
  • (Brazil - Rio de Janeiro).
Oncidium forbesii
Oncidium harrisonianum
  • (Brazil to NE. Argentina).
  • (NW. Venezuela to Ecuador).
  • (Paraguay).
  • Oncidium enderianum (SE. Brazil).
  • (Mexico - Chiapas to C. America).
  • Oncidium ensatum : (S. Mexico, Belize, Cuba, Florida, Bahamas, NW. Venezuela).
  • (Ecuador).
  • (Ecuador).
  • Oncidium eurycline (SE. Brazil).
  • (Panama).
  • (Peru).
  • Oncidium excavatum (C. America to Peru)., moved to Vitekorchis excavata ( & Szlach., 2006)[10][11]
  • (Mexico - Oaxaca, Chiapas to Guatemala).
  • (Peru).
  • (Brazil to NE. Argentina).
  • Oncidium flexuosum (E. & S. Brazil to NC. Argentina).
  • Oncidium floridanum : syn of O. ensatum
  • (O. prionochilum × O. variegatum) (Leeward Is.).
  • Oncidium forbesii (Brazil - Minas Gerais).
  • (Ecuador to Peru).
  • (Brazil - Rio de Janeiro).
  • (Brazil - Minas Gerais).
  • Oncidium fuscatum (Ecuador to Peru).
  • (WC. Brazil).
Oncidium longipes
  • Oncidium gardneri (Ecuador, SE. Brazil).
  • (O. dasystyle × O. gardneri) (Brazil - Rio de Janeiro).
  • (Jamaica) (now synonym of Tolumnia gauntlettii)
  • Oncidium geertianum (C. & SW. Mexico).
  • (SE. Brazil).
  • (SE. Brazil).
  • (C.Panama).
  • (Colombia).
  • Oncidium graminifolium (Mexico to C. America).
  • (E. Brazil).
  • (Hispaniola) (now synonym of Tolumnia guianensis)
  • (Cuba) (now synonym of Tolumnia guibertiana)
  • (Mexico to Colombia and Caribbean) (now synonym of Tolumnia guttata)
  • (Ecuador).
  • Oncidium hagsaterianum (Mexico to Guatemala).
  • (Hispaniola) (now synonym of Tolumnia haitensis)
  • Oncidium hannelorae (Windward Is.-(Dominica).
  • (Colombia to Ecuador).
  • Oncidium harrisonianum (SE. Brazil).
  • Oncidium harryanum (Columbia).
  • Oncidium hastatum (Mexico).
  • Oncidium hastilabium (W. South America).
  • (Brazil - Paraná).
Oncidium macronix
  • (Ecuador).
  • (Bolivia to NW. Argentina).
  • (S. Trop. America).
  • (Peru, SE. Brazil).
  • (Peru).
  • (N. & SW. Mexico).
  • (Ecuador – Napo).
  • (SE. & S. Brazil.
  • Oncidium hydrophilum (Brazil to Paraguay).
  • (W. South America).
  • (Costa Rica).
  • Oncidium imperatoris-maximiliani (Brazil - Rio de Janeiro).
  • Oncidium incurvum (Mexico - Veracruz to Chiapas).
Oncidium pulvinatum
  • (Peru).
  • (Brazil).
  • (Peru - Cajamarca).
  • (Trop. America) (?).
  • (Peru).
  • (Brazil - Minas Gerais).
  • (Costa Rica to Panama).
  • (Brazil).
  • Oncidium klotzschianum (Costa Rica to Venezuela and Peru).
  • (Brazil).
  • (Costa Rica to Suriname and Ecuador) (now synonym of Psychopsis krameriana)
  • (Ecuador).
  • (Brazil).
  • (SW. Mexico).
  • Oncidium lentiginosum (Colombia to N. Venezuela).
  • (Peru).
  • (Ecuador).
Oncidium sphegiferum
  • (Bolivia).
  • Oncidium leucochilum (SE. Mexico to Guatemala).
  • (SE. Brazil).
  • (Colombia).
  • (S. Mexico to Guatemala).
  • Oncidium lineoligerum (N. Peru).
  • (SE. Brazil).
  • (Venezuela).
  • (SE. & S. Brazil).
  • Oncidium longicornu (Brazil to NE. Argentina.
  • Oncidium longipes (Brazil to NE. Argentina).
  • (Peru - Cajamarca).
  • (Bahamas) (now synonym of Tolumnia lucayana)
  • (Costa Rica).
  • (Bolivia).
  • Oncidium macronyx (Brazil).
  • Oncidium macropetalum (W.C. Brazil)
  • Oncidium maculatum (Mexico to C. America).
  • Oncidium maculosum (Brazil - Minas Gerais).
  • (NW. Venezuela - Mérida).
  • (Colombia to NW. Venezuela).
  • (Brazil).
  • Dodson & R.Estrada (Ecuador)
  • (Bolivia).
  • Oncidium marshallianum (SE. Brazil).
  • (SE. & S. Brazil).
  • (Ecuador to Peru).
  • Oncidium megalopterum (SE. Brazil).
  • (Ecuador).
  • Oncidium micropogon (Brazil).
  • (S. Brazil). Pseudobulb epiphyte
  • (C. & SW. Mexico).
  • (Colombia).
  • (Colombia to NW. Venezuela).
  • (Brazil) (replaced synonym of the accepted name Trichocentrum morenoi (Dodson & Luer) M.W.Chase & N.H.Williams, 2001 ).
  • Oncidium naevium (Colombia to Guyana).
  • (Colombia).
  • (Colombia).
  • (Colombia to Guyana).
  • Oncidium noezlianum (N. Peru to Bolivia).
  • (Costa Rica to Ecuador).
  • Oncidium ochmatochilum (SE. Mexico to Peru).
Oncidium ochmatochilum
  • (Ecuador).
  • (Mexico - Oaxaca, Chiapas to El Salvador).
  • (Colombia).
  • (Colombia).
  • (Trop. America).
  • Oncidium ornithorhynchum (Mexico to C. America).
  • Oncidium orthostates (S. Venezuela to Guyana and Brazil). This species has been redefined as (Rchb. f.), M.W. Chase & Whitten [12]
  • (Peru).
  • (Bolivia).
  • (Brazil - Bahia).
  • (Panama).
  • (Colombia.
  • (Costa Rica).
  • (Panama to S. Trop. America and Trinidad) (now synonym of Psychopsis papilio)
  • (Brazil to Argentina - Misiones).
  • (Brazil - São Paulo).
  • Oncidium pardalis (N. Venezuela).
  • (Trop. America) (?).
  • (Ecuador to Peru).
  • (Costa Rica to Panama).
  • Oncidium pectorale (Brazil - Rio de Janeiro).
  • Oncidium pelicanum (Mexico - Guerrero, Oaxaca).
  • (Ecuador).
  • (W. South America).
  • (NC. & SE. Mexico to C. America).
  • (W. South America).
  • (N. Venezuela).
  • (Guyana).
  • (W. South America).
  • (Colombia to Ecuador).
  • Oncidium platyglossum (Colombia).
  • (Mexico - Oaxaca).
  • (Ecuador to N. Peru).
  • (SE. Brazil).
  • (Ecuador).
  • (Colombia).
  • (Panama).
  • Oncidium praetextum (SE. Brazil).
  • (Puerto Rico to Virgin Is.) (now synonym of Tolumnia prionochila)
  • Oncidium pubes (Colombia, SE. Brazil to NE. Argentina).
  • Oncidium pulchellum (Jamaica) (now synonym of Tolumnia pulchella)
  • Oncidium pulvinatum (Brazil to NE. Argentina).
  • (Panama).
  • (W. South America).
  • (Trop. America) (?).
  • (Hispaniola) (now synonym of Tolumnia quadriloba)
  • Oncidium raniferum (SE. Brazil).
  • (Bolivia).
  • Oncidium reflexum (SW. Mexico)
  • V.P.Castro & G.F.Carr (2005) (Brazil)
  • (Colombia to NW. Venezuela).
  • (Brazil).
  • (Peru).
  • Oncidium rhinoceros (Trop. America) (?).
  • (S. Brazil to NE. Argentina.
  • (Ecuador).
  • (Brazil).
  • Oncidium robustissimum (Brazil).
  • (Colombia).
  • (Colombia).
  • (Venezuela).
  • (Peru - Huánuco) (now synonym of Psychopsis sanderae)
  • Oncidium sarcodes (SE. Brazil).
  • (Colombia).
  • (Peru).
  • Oncidium schmidtianum (Trop. America) (?).
  • (Brazil).
  • (Brazil).
  • (Costa Rica).
  • (O. curtum × O. gravesianum) (SE. Brazil).
  • (Brazil).
  • (Ecuador).
  • (Venezuela to Peru).
  • (Peru).
  • (Brazil).
  • (Argentina - Misiones).
  • Oncidium sphacelatum (Mexico to C. America, SE. Venezuela).
  • Oncidium sphegiferum (Brazil - Rio de Janeiro).
  • (SW. Mexico).
  • (Costa Rica).
  • Oncidium stenotis (Costa Rica to Ecuador).
  • (Costa Rica).
  • Oncidium suave (C. & SW. Mexico, El Salvador).
  • (Belize), (Nicaragua).
  • (Mexico - Chiapas to El Salvador).
  • (Windward Is.- Martinique).
  • (Cuba to Haiti) (now synonym of Tolumnia sylvestris)
  • (Colombia).
  • (French Guiana).
  • (Guatemala).
  • (Colombia).
  • (Ecuador to Peru).
  • (C. & SW. Mexico).
  • (Peru).
  • (Ecuador).
  • (Colombia to Ecuador).
  • (N. Brazil).
  • (Peru).
  • (Ecuador).
  • (Jamaica) (now synonym of Tolumnia triquetra)
  • Oncidium trulliferum (Brazil - Rio de Janeiro).
  • (Brazil - Mato Grosso).
  • (Colombia).
  • (Cuba to Hispaniola) (now synonym of Tolumnia tuerckheimii )
  • Oncidium unguiculatum (C. & SW. Mexico).
  • (SE. Brazil).
  • Oncidium uniflorum (SE. & S. Brazil).
  • Oncidium urophyllum (Lesser Antilles) (now synonym of Tolumnia urophylla)
  • (Cuba) (now synonym of Tolumnia usneoides)
  • Oncidium varicosum (Brazil to N. Argentina).
Oncidium varicosum
  • (S. Florida to Caribbean) (now synonym of Tolumnia variegata)
    • Oncidium variegatum subsp. bahamense (S. Florida to Bahamas) (now synonym of Tolumnia bahamensis)
    • Oncidium variegatum subsp. leiboldii (Cayman Is. to Cuba) (now synonym of Tolumnia leiboldii )
    • Oncidium variegatum subsp. scandens (Haiti) (now synonym of Tolumnia scandens)
    • Oncidium variegatum subsp. velutinum (Cuba) (now synonym of Tolumnia velutina)
  • (Bolivia).
  • Oncidium venustum (Brazil).
  • (Ecuador).
  • (Paraguay to NE. Argentina).
  • (Suriname to Ecuador) (now synonym of Psychopsis versteegiana)
  • (Bolivia to NW. Argentina).
  • (Colombia to Ecuador).
  • (NW. & N. Venezuela).
  • (S. Venezuela to Brazil).
  • (Costa Rica to Colombia).
  • (Bolivia).
  • (Brazil - São Paulo).
  • Oncidium wentworthianum (Mexico – Chiapas to El Salvador).
  • (Brazil).
  • (SE. & S. Brazil to Paraguay).
  • (Bolivia).
  • (Colombia).
  • (NW. Venezuela to Ecuador).
  • (Brazil).

See also[]

  • × Oncostele, a hybrid genus with at least one Oncidium ancestor

References[]

  1. ^ a b "World Checklist of Selected Plant Families: Royal Botanic Gardens, Kew". apps.kew.org.
  2. ^ "My Huge List of Orchid Abbreviations". 13 June 2014.
  3. ^ Flora of North America, v 26 p 648, Oncidium ensatum
  4. ^ USDA, NRCS (n.d.). "Oncidium". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 22 July 2015.
  5. ^ a b Chase, Mark W.; Williams, Norris H.; Faria, De; Donisete, Aparacida; Neubig, Kurt M.; Amaral, Maria do Carmo E.; Whitten, W. Mark (1 August 2009). "Floral convergence in Oncidiinae (Cymbidieae; Orchidaceae): an expanded concept of Gomesa and a new genus Nohawilliamsia". Annals of Botany. 104 (3): 387–402. doi:10.1093/aob/mcp067. PMC 2720657. PMID 19346522 – via aob.oxfordjournals.org.
  6. ^ a b Lindleyana : The scientific journal of the American Orchid Society. December 2008 Pg 20
  7. ^ "Kew News - Orchid community agree name changes in Oncidium". Archived from the original on 2013-06-24.
  8. ^ "Genera Orchidacearum Volume 5 Epidendroideae (Part II)Edited by Alec M. Pridgeon, Phillip Cribb, Mark W. Chase, and Finn N. Rasmussen".
  9. ^ "World Checklist of Selected Plant Families: Royal Botanic Gardens, Kew". apps.kew.org.
  10. ^ Romowicz & Szlach. 2006. In: Polish Bot. J. 51: 46
  11. ^ The Plant List: Vitekorchis excvata (2017-04-18)
  12. ^ Chase, Mark W. (2009). "A new name for the single species of Nohawilliamsia and corrections in Gomesa (Orchidaceae)". Phytotaxa. 1: 57–59. doi:10.11646/phytotaxa.1.1.6.

External links[]

  • Media related to Oncidium at Wikimedia Commons
  • Data related to Oncidium at Wikispecies
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