Epidendrum dichotomum

Epidendrum dichotomum C.Presl (1827) is a member of the E. secundum group which can grow terrestrially, on rocks, and in trees. Kew accepts it as a separate species without any synonyms.,[1] as did H. G. Reichenbach (1861).[2] In Schweinfurth (1960),[3] E. dichotomum is the accepted name of a species distinct from E. secundum, but with several listed synonyms: E. brachyphyllum, E. lindenii, E. cuzcoense, E. tarmense, and E. inconstans. In Schweinfurth (1970), E. dichotomum is reduced to synonymy under E. secundum.[4]

Epidendrum dichotomum
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Epidendroideae
Genus: Epidendrum
Subgenus: Epidendrum subg. Amphiglottium
Section: Epidendrum sect. Schistochila
Subsection: Epidendrum subsect. Tuberculata
Species:
E. dichotomum
Binomial name
Epidendrum dichotomum

Description

E. dichotomum is quite similar to E. secundum. According to H. G. Reichenbach (1861), it is distinguished by a small lip, an entire clinandrium, and an unlobed tubercle with a pair of smaller calli near its base. According to Schweinfurth (1960), the tubercle (described as a callus) has three to five lobes with two additional lobes extending into each lateral lobe of the lip. The original description makes no mention of the tubercle, but simply compares E. dichotomum to both E. fimbriato and E. ibaguense, and notes that it differs sufficiently from both of them.[5]

Homonymy

The homonym Epidendrum dichotomum Lindl. (1838), nom. illeg. is a synonym for the different species, Epidendrum jamaicense Lindl. (1853)

References
  1. http://apps.kew.org/wcsp/namedetail.do?accepted_id=68267&repSynonym_id=-9998&name_id=68267&status=true
  2. H. G. Reichenbach "ORCHIDES" Nr. 278 in C. Müller, Ed. Walpers Annales Botanices Systematicae 6(1861)392. Berlin.
  3. Schweinfurth "Orchids of Peru" Fieldiana:Botany 30(1960)422,424. Field Museum. Chicago, IL
  4. Schewinfurth "First Supplement to the Orchids of Peru" Fieldiana:Botany 33(1970)35 Field Museum. Chicago, IL
  5. "Affine praecedenti et E. fimbriato; ab ambobus sufficienter differt" Carl Presl in Reliquiae Haenkeanae, seu, Descriptiones et icones plantarum, Quas in America meridionali et Boreali, in Insulis Philippinis et Marianis Collegit 1(1827)101, available on the web at https://www.biodiversitylibrary.org/item/10047#3
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