Anthurium jaimeanum and A. pahumense (Araceae): two new species from the W slopes of the Ecuadorian Andes

Publication Type:Journal Article
Year of Publication:2014
Authors:Cerón, C. E., Croat T. B.
Journal:Willdenowia. Mitteilungen aus dem Botanischen Garten und Museum Berlin-Dahlem. Berlin-Dahlem
Start Page:201
Keywords:Anthurium sect. Porphyrochitonium, Ecuador

illustrated. The two species are members of A. sect. Porphyrochitonium Schott from the W slopes of the Ecuadorian Andes in Pichincha Province. Anthurium jaimeanum occurs at 1800 m in a premontane rain forest life zone, whereas A. pahumense is found at 1800 – 2200 m in a lower montane wet forest life zone. The new species are unusual in A. sect. Porphyrochitonium, a group characterized by having short internodes and glandular punctate blades, in that they have unusually long internodes.

Full Text

Anthurium Schott consists chiefly of epiphytic, sometimes terrestrial herbs widely distributed in the neotropics, especially the Andes of South America, with Ecuador as one of its principal centres of diversity (Croat & Rodríguez de Salvador 1995). The catalogue of vascular plants of Ecuador (Croat 1999) registered 404 species of Araceae, 227 of which belonged to Anthurium. Only five years after the publication of this checklist the number of published species of Araceae had increased to 429 species and the genus Anthurium had increased to 236 species (Ulloa Ulloa & Neill 2005). There are 168 species of Araceae believed to be endemic to Ecuador, and 130 of these are species of Anthurium (Benavides & Croat 2000).
During recent explorations on the W slopes of the Andes in Pichincha Province, at the Reserva Orquideológica Pahuma, located above km 30 on the Quito-Nanegalito highway, 35 species of Araceae were encountered. Of these, one species each of Anthurium and Philodendron Schott were determined to be undescribed (Cerón & Reyes 2008). The new species of Anthurium is described here and a second, similar species is described from the Reserva Natural Río Guajalito, also in Pichincha Province.

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith