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 In the present paper several species of Lycopodium L. from Sichuan, West China, are enumerated, of which 4 are described as new. They are: L. emeiense Ching et H. S. Kung, L. nanchuanense Ching et H. S. Kung, L. crispatum Ching and L. kangdingense Ching.  In the course of this study, the writer has tried as much as he could to review rather exhaustively all the Lycopodium species of the province published sporadically in the literature in the past and their identity is established on the basis of rich ma- terials available, thus a number of mistakes by earlier authors being revised.      My thanks are due to the comrades of herbaria of many botanical institutions and universities for their friendly co-operation, and to Prof. R. C. Ching of the Instituteof Botany, Academia Sinica, under whose guidance the present study was carried out.  相似文献   

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类胡萝卜素是一类有相似结构的生物色素的总称,在生物体内有重要的生理功能.家蚕从食下的桑叶中获取大量的类胡萝卜素,并广泛分布于中肠、血淋巴、丝腺等组织中.类胡萝卜素对家蚕幼虫的生长发育有一定的影响,尤其是对幼虫和成虫的趋光性和视觉感光性的产生有重要的作用.同其它的生物相似,家蚕体内的类胡萝卜素也是和蛋白质结合在一起形成复合物,类胡萝卜素结合蛋白在维护类胡萝卜素的稳定、体内贮存及转运上都起着重要的作用.  相似文献   

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描述了采自中国广西的苦苣苔科新种桂林蛛毛苣苔Paraboea guilinensis L. Xu & Y. G. Wei。新种体态及叶形接近厚叶蛛毛苣苔P. crassifolia (Hemsl.) Burtt,与后者不同在于叶革质,花序梗、花梗及花萼均无毛,花冠明显二唇形,蒴果不旋扭。  相似文献   

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