Abstract

FIASCHI, Pedro  and  PIRANI, José Rubens. Patterns of geographic distribution of the extra-Amazonian Brazilian species of Schefflera J. R. Forst. & G. Forst. (Araliaceae). Rev. bras. Bot. [online]. 2008, vol.31, n.4, pp. 633-644. ISSN 1806-9959.  http://dx.doi.org/10.1590/S0100-84042008000400009.

An analysis of the geographic distribution of the 26 species of Schefflera from extra-Amazonian Brazil was prepared based on maps depicting the known occurrences of the taxa. These include: S. angustissima (Marchal) Frodin, S. aurata Fiaschi, S. botumirimensis Fiaschi & Pirani, S. burchellii (Seem.) Frodin & Fiaschi, S. calva (Cham.) Frodin & Fiaschi, S. capixaba Fiaschi, S. cephalantha (Harms) Frodin, S. cordata (Taub.) Frodin & Fiaschi, S. distractiflora (Harms) Frodin, S. fruticosa Fiaschi & Pirani, S. gardneri (Seem.) Frodin & Fiaschi, S. glaziovii (Taub.) Frodin & Fiaschi, S. grandigemma Fiaschi, S. kollmannii Fiaschi, S. longipetiolata (Pohl ex DC.) Frodin & Fiaschi, S. lucumoides (Decne. & Planch. ex Marchal) Frodin & Fiaschi, S. macrocarpa (Cham. & Schltdl.) Frodin, S. malmei (Harms) Frodin, S. morototoni (Aubl.) Maguire, Steyermark & Frodin, S. racemifera Fiaschi & Frodin, S. ruschiana Fiaschi & Pirani, S. selloi (Marchal) Frodin & Fiaschi, S. succinea Frodin & Fiaschi, S. villosissima Fiaschi & Pirani, S. vinosa (Cham. & Schltdl.) Frodin & Fiaschi e S. aff. varisiana Frodin. Two centers of endemism associated with high-altitude areas were recognized: Espinhaço Range in Minas Gerais state and montane forests of Espírito Santo state. The geographic patterns found are discussed with regard to other groups of angiosperms, as well as to phytogeographic studies of the main extra-Amazonian Brazilian phytocoria. Some hypothesis concerning probable phylogenetic relationships among some taxa are analysed in the light of the observed distribution patterns.

Keywords : Brazil; Didymopanax; endemism; geographic distribution; Schefflera.