Coilostylis, was split off from the "supergenus" Epidendrum

Epidendrum

Epidendrum , abbreviated Epi in horticultural trade, is a large neotropical genus of the orchid family. With more than 1,100 species, some authors describe it as a mega-genus. The genus name refers to its epiphytic growth habit...

in 2004. This genus features pseudobulbs, large bracts around the flowers, and flowers that are typically resupinate, with the trilobate lip adnate to the column and having a long thin midlobe. It is not unusual for this genus to produce keikes

Keiki

Keiki is the Hawaiian word for "baby" or "child", literally meaning "the little one". In horticulture, it refers to a plant produced asexually by an orchid plant, usually used when referring to Dendrobium, Epidendrum , and Phalaenopsis orchids...

.

Species

• C. ciliare, recognized by Kew as E. ciliare, is the type species of Coilostylis

• C. claviata is native to Costa Rica. In the opinion of Kew, the name of this taxon is E. purpurascens

• C. cuspidata, formerly E. cuspidatum is often confused with C. ciliare.

• C. falcata is a lithophyte from Mexico. The leaves are "sicle shaped," hence falcata. A picture may be found at

http://www.abundaflora.com/epi_falcatum.htm

• C. lacertina, formerly E. lacertinum. Harding has contributed a photo which can be found at

http://www.orchidspecies.com/coillacertinum.htm

• C. oerstedii, formerly E. oerstedii, native to Costa Rica and Panama, has green-white flowers and a diamond-shaped elongated midlobe on the lip. Although sometimes cited as Epidendrum ciliare var oerstedii, the lateral lobes of the lip are not ciliate. A nice picture can be found at

http://www.orchidspecies.com/coiloerstedii.htm

• C. parkinsoniana, formerly E. parkinsonianum has fragrant flowers which closely resemble but are much larger than the flowers of E. nocturnum
  Epidendrum nocturnum
  Epidendrum nocturnum is the type species of the genus Epidendrum of the Orchidaceae .The species occurs in Florida, Bahamas, West Indies, Central America to northern Brazil and the Guyanas...
  
  , the type species of Epidendrum
  Epidendrum
  Epidendrum , abbreviated Epi in horticultural trade, is a large neotropical genus of the orchid family. With more than 1,100 species, some authors describe it as a mega-genus. The genus name refers to its epiphytic growth habit...
  
  . Some pictures can be found at http://www.acao.cat/wiki/index.php?title=Coilostylis_parkinsoniana&redirect=no

• C. vivipara(Lindl.
  Lindley
  -Place names:*Lindley, Free State, a town in South Africa*Lindley, Gauteng, a suburb of Johannesburg, South Africa*Lindley, New York, a town in the United States*Lindley, North Yorkshire, England*Lindley, West Yorkshire, a suburb of Huddersfield, England...
  
  Withner & P.A.Harding, formerly E. viviparum, has fusiform pseudobulbs bearing two leaves, membranacious bracts as long as the ovary, and unfringed lateral lobes of the lip. This species was named for its habit of producing many keikeis. A photo of a plant, with a flowering keikei, can be found at

http://www.orchidspecies.com/orphotdir/epipurpurescens.jpg
A digitized version of the original publication in Ewdwards's Botanical Register can be found on page 10 (after the plates) of
http://www.botanicus.org/item/31753002748405

Acceptance

Althouogh the existence of the taxon Coilostylis is hard to deny, there remains some debate about its rank: is this a genus, subgenus, section, or subsection? A brief summary of recent thought (since the publication of The Debatable Epidendrum

Epidendrum

Epidendrum , abbreviated Epi in horticultural trade, is a large neotropical genus of the orchid family. With more than 1,100 species, some authors describe it as a mega-genus. The genus name refers to its epiphytic growth habit...

s) is provided.

In January, 2005, The Royal Botanic Gardens, Kew, published Orchid Research Newsletter Number 45, announcing that Volume 4 of Genera Orchidacearum was being sent to the printers. This Newsletter listed the new assignment of species to Coilostylis. (This reference can be found at
http://www.kew.org/herbarium/orchid/orn45.pdf)

As recently as December 2007, The RHS Orchid Hybrid Registration Authority was still calling Coilostylis vivipara by the name "Epidendrum viviparum Lindl.

Lindley

-Place names:*Lindley, Free State, a town in South Africa*Lindley, Gauteng, a suburb of Johannesburg, South Africa*Lindley, New York, a town in the United States*Lindley, North Yorkshire, England*Lindley, West Yorkshire, a suburb of Huddersfield, England...

" In the same issue of Orchid Review, the RHS announced that the changes in Volume 4 of Genera Orchidacearum were now reflected in new registrations. (This reference can be found at
http://www.rhs.org.uk/NR/rdonlyres/EB660871-3BBF-43B1-8DB6-5ECF714E7C7F/0/orrevMar08.pdf)

Sources

• Withner, C. A. and Harding, P. A., Cattleyas and Their Relatives. The Debatable Epidendrums Timber Press 2004.