Abstract:An investigation of endangered monotypic species Monimopetalum chinense (Celastraceae) was carried out in Jiangxi Proyince during recent years. The factors that caused this species endangered can be focused on (1) the obsctruction in seed germination due to solid seed coat; (2) poor pollination and ovule-obortion; (3) embryo dormancy or dehydration after maturing of the seeds; and, (4) serious environmental disturbance by human factors. Some suggestions for the conservation of the species are made.