TITLE	Notes on Begonia (sect. Coelocentrum, Begoniaceae) from Guangxi, China, with the report of two new species
AUTHOR	Shin-Ming KU Institute of Botany, Academia Sinica, Nankang, Taipei 115, Taiwan Ching-I PENG Institute of Botany, Academia Sinica, Nankang, Taipei 115, Taiwan Yan LIU Guangxi Institute of Botany, Guangxi Zhuangzu Autonomous Region and Academia Sinica, Guilin 541006, China
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ABSTRACT	Begonia curvicarpa and B. luochengensis, two new species of sect. Coelocentrum from the karst area in northern Guangxi Zhuangzu Autonomous Region, China are described and illustrated. Their somatic chromosome numbers, both 2n = 30, are reported. Begonia curvicarpa resembles B. porteri, from which it differs in having longer (1.5-5.5 cm vs. 0.8-1.7 cm) internodes on the rhizome, fewer hairs on upper leaf surface, and remarkably curved capsules. Begonia luochengensis is similar to B. luzhaiensis, but differs from the latter in having ovate (vs. orbicular to broadly ovate) leaves with a characteristic white band along midrib. Begonia yishanensis is treated as a synonym of B. porteri, and B. zhangii is treated as a synonym of B. daxinensis.
KEYWORD	Begoniaceae; Begonia cirrosa; Begonia curvicarpa; Begonia luochengensis; Begonia luzhaiensis; Begonia porteri; Begonia yishanensis; Begonia daxinensis; Begonia zhangii; China; Chromosome number; Guangxi; New species; sect Coelocentrum.;
ARTICLE INFO	Botanical Bulletin of Academia Sinica, Volume 45 Number 4 October 2004, page 353-367, 15 pages
PUBLISHER	Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan, Republic of China