中国不产曲籽芋属植物

Cyrtosperma (Araceae) does not occur in China

曲籽芋属在中国的分布源自对采自海南的一号标本———W .T .Tsang (曾怀德 ) 5 5 3=L .U .1 60 5 2( 1 92 7年 8月 2 7日采 )的错误鉴定。这号标本被E .D .Merrill定名为曲籽芋CyrtospermalasioidesGriffith ,并分藏于国内外的标本馆。因此 ,《海南植物志》第四卷、《中国植物志》第十三卷第二分册、《中国种子植物科属词典》以及吴征镒的《中国种子植物属的分布区类型》一文等都记录了曲籽芋属。收藏在中国科学院华南植物研究所、英国邱皇家植物园和爱丁堡皇家植物园的W .T .Tsang (曾怀德 ) 5 5 3号标本上各有 1叶和 1个已无佛焰苞的果序。根据其叶片的后裂片远短于前裂片和胚珠从室顶下垂等特征 ,认为该标本不同于曲籽芋属植物 ,而是刺芋LasiaspinosaThwaites。因此 。

The earliest record of Cyrtosperma Griffith in China was made based on a collection from Hainan, W. T. Tsang 553 = L. U. 16052. This collection was identified as Cyrtosperma lasioides Griffith by E. D. Merrill and its duplicates were sent to different herbaria in China and other countries. Since then this genus has been formally recorded or mentioned in various works, such as the Flora of Hainan, Flora Reipublicae Popularis Sinicae, A Dictionary of the Families and Genera of Chinese Seed Plants, and C. Y. Wu's paper entitled 'The Areal-types of Chinese Genera of Seed Plants' as well. Close examination of different sheets of W. T. Tsang 553 separately kept in E, IBSC and K, which all have a sagittate leaf and an infructescence lacking spathe, has shown that the plant is not a member of Cyrtosperma by having three leaf-blades, with the two postior divisions much shorter than the anterior one, and anatropous ovule from apical placenta: We consider that W. T. Tsang 553 should be referred to Lasia spinosa (L.) Thwaites and thus the genus Cyrtosperma does not occur in China.