能源植物潜力种——甘肃大戟(Euphorbia kansuensis Prokh.)的形态和分布研究

摘要

[Objective] The research aimed to study the taxonomy of E. kansuensis Prokh. [Method] With fresh plants collected locally, together with specimens, the morphological characteristics and distribution of E. kansuensis Prokh. and E. ebraceolata Hayata in Subgen. Esula distributed in Jiangsu Province were studied. [Result] There was no obvious distinction between E. kansuensis Prokh. in Flora of China and E. ebraceolata Hayata in Flora of Jiangsu in terms of indumentum and root characteristics, therefore the perspective that E. ebraceolata Hayata was a wrong name for E. kansuensis Prokh. in Flora of China proved to be reasonable. However, the description of E. kansuensis Prokh. should be modified as follows; puberulent or glabrous plants; roots shape varying from spindle to cylinder; oblong-kidney shaped glands. [ Conclusion] This paper is of great significance for understanding the taxonomy of E. kansuensis Prokh.%[目的]研究甘肃大戟的分类学地位.[方法]根据野外调查、采集,结合标本观察,对江苏分布的乳浆大戟亚属的甘肃大戟( Euphorbia kansuensis Prokh.)和月腺大戟(E.ebraceolata Hayata)的形态特征和分布区等方面进行了研究.[结果]《江苏植物志面记载的月腺大戟和《中国植物志》的甘肃大戟在形态描述的被毛和根形态这2个重要特征上没有明显区别,且相互有交叉,故《中国植物志》认为月腺大戟是甘肃大戟的误用名是合理的,但是其形态描述应修订为:全株有毛或无毛；根为纺锤形至圆柱状；腺体为肾状长圆形.[结论]该研究对于理清甘肃大戟的分类学地位具有重要意义.