Abstract: Monimopetalum chinense Rehd. belonging to a monotypic and endemic genus and is the second class conservative tree of rare and endangered species in China as well as the geog-raphical element of East China flora. This paper deals with the ecological characters of natural habitat, geographical distribution, spatial pattern, community composition, quantitative features, population size and reproductive ecology of the species. The results of investigation indicate that the distribution ofM. Chinense is very narrow, natural habitat is fragmentary and its population Shows colonial distribution pattern. The community composition and structure are complex. The trees of Cunninghamia lanceolata, Pinus massoniana, Alniphyllum fortunei etc. are dorminant in the community. Sexual reproduction of this species is bad and its population gradually become smaller owing to environmental stress, stand crown density and ecological features of reproduction etc.

Key words: lowly efficient Tamarix chinensis shrub, growth index, soil physical and chemical indices, classification, Yellow River Delta.