TITLE	Begonia rubinea (sect. Platycentrum, Begoniaceae), a new species from Guizhou, China
AUTHOR	Hong-Zhe LI Kunming Institute of Botany, the Chinese Academy of Sciences, Kunming, Yunnan 650204, P.R. China Hong MA Kunming Institute of Botany, the Chinese Academy of Sciences, Kunming, Yunnan 650204, P.R. China Kai-Yun GUAN Kunming Institute of Botany, the Chinese Academy of Sciences, Kunming, Yunnan 650204, P.R. China Ching-I PENG Herbarium, Research Center for Biodiversity, Academia Sinica, Nangang, Taipei 115, Taiwan
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ABSTRACT	Begonia rubinea (sect. Platycentrum), a new species from Guizhou Province, China, is described and illustrated. Its chromosome number (2n= 22) and pollen morphology are reported. Begonia rubinea was collected from a small damp cliff in Changqiangou, Xishui National Reserve of Evergreen Arbor Forest, in Guizhou. It resembles B. smithiana T.T. Yu ex Irmsch. in aspect, but is distinct by the combination of the following characters: leaves thinly coriaceous and glossy, sparsely hispidulous; leaf margin entire or remotely shallowly denticulate; petioles glabrous; androecium zygomorphic, stamens few (15-30), androphore distinct, 2-3 mm long; and ovary glabrous or nearly so. Line drawings of B. rubinea and color photographs of both B. rubinea and B. smithiana are presented to aid in identification.
KEYWORD	Begonia; Begonia rubinea; B. smithiana; Begonia sect. Platycentrum; China; Chromosome number; New species; Pollen morphology; Rare species;
ARTICLE INFO	Botanical Bulletin of Academia Sinica, Volume 46 Number 4 October 2005, page 377-383, 7 pages
PUBLISHER	Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan, Republic of China