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New Species of Trichocentrum (Orchidaceae) from the Andes with a Realignment of the Trichocentrum pulchrum Group

1998; Missouri Botanical Garden Press; Volume: 8; Issue: 3 Linguagem: Inglês

10.2307/3392021

1945-6174

Franco Pupulin,

Plant Diversity and Evolution

Two new species of Trichocentrum, T. obcordilabium Pupulin and T viridulum Pupulin, are described from the northwestern South Ameri- can Andes. brandtiae Kraenzlin and T verruciferum Schlechter are reduced to synonymy of T longicalcaratum Rolfe, and a new key to the pulchrum group is provided. Poeppig & Endlicher is a neotrop- ical genus of about 24 epiphytic species distributed from southern Mexico to Brazil, Bolivia, and Peru. Cladistic analysis based on variation in chloroplast DNA (Chase & Palmer, 1992) suggests close rela- tionships within the Lophiaris clade, including On- cidium sect. Cebolletae Lindley and O. sect. Plur- ituberculata Lindley, where occupies a derived position. In a revision of the genus, Pupulin (1995) gath- ered three Andean species of in an informally proposed Trichocentrum pulchrum