%A WANG Jian-Bo, CHEN Jia-Kuan, LI Rong-Qian, HE Guo-Qing %T Life history traits and mechanisms of endangerment in Ranalisma rostratum %0 Journal Article %D 1998 %J Biodiv Sci %R 10.17520/biods.1998025 %P 167-171 %V 06 %N 3 %U {https://www.biodiversity-science.net/CN/abstract/article_7159.shtml} %8 1998-08-20 %X Ranalisma rostratum (Alismataceae) is an endangered aquatic plant , and now there exists only one population in China. In its natural habitat , Huli marsh in Chaling , Hunan Province , the best growing plants were observed at microsites where the water depth is five to 10 cm , and the plants grow in emergent form. R. rostratum reproduces asexually or sexually , and recruitment of asexual propagules into population is a very importment way to maintain the natural population size. Although seed production does not appear to limit R. rostratum , restricted dispersal of propagules and seeds , low seed viability , low germinability , slow growth of seedlings under all conditions , and habitat loss due to agriculture appear to be more important reasons for the endangerment of this plant .