TITLE	Begonia coptidifolia (Begoniaceae), a new species from China
AUTHOR	Hua-Gu YE South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou, Guangdong 510650, China Fa-Guo WANG South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou, Guangdong 510650, China Yu-Shi YE South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou, Guangdong 510650, China Yu-Shi YE South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou, Guangdong 510650, China Ching-I PENG Institute of Botany, Academia Sinica, Nankang, Taipei 115, Taiwan
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ABSTRACT	Begonia coptidifolia H. G. Ye, F. G. Wang, Y. S. Ye & C.-I Peng, a new species from Guangdong province, China, is here described and illustrated. Its chromosome number (2n=22) and karyotype are reported. Begonia coptidifolia belongs to sect. Platycentrum and somewhat resembles B. hemsleyana Hook. f., from which it differs by the aerial stems seen only at anthesis (vs. all year round), palmately trisected leaves with pinnately parted lobules (vs. leaves palmately compound with 7-9 petiolulate leaflets) and petioles grooved on adaxial surface (vs. terete). The new species also resembles Begonia pedatifida H. Lev., which, however, has much stouter rhizomes (2-6 cm vs. 0.3-0.5 cm thick), leaves palmatifid with triangular lobules, and terete petioles. Begonia coptidifolia is rare, known only from a small ravine in Ehuangzhang Nature Reserve, Yangchun, Guangdong Province.
KEYWORD	Begoniaceae; Begonia coptidifolia; Begonia hemsleyana; Begonia pedatifida; China; Chromosome number; Ehuangzhang Nature Reserve; Guangdong; Karyotype; New species; Rare species;
ARTICLE INFO	Botanical Bulletin of Academia Sinica, Volume 45 Number 3 July 2004, page 259-266, 8 pages
PUBLISHER	Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan, Republic of China