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