| Siraitia grosvenorii (Swingle) C.Jeffrey (Cucurbitaceae), a dioecious,perennial and liana plant with root tubers, which stems lowered to the ground can occurs clone growth, is an economically important species endemic to southern China. Analysis about Siraitia grosvenorii on taxonomy, geographic distribution,mophology, cultivation techniques and exploitation have developed to a in-depth level, Whereas there is lack of the research population ecology currently. The distribution pattern of eight natural Siraitia grosvenorii populations in Guangxi were analyzed by the variance/mean ratio method, and their aggregated intensities were measured by using the following indices: negative binomial parameter, dispersal index, clumping index, crowing mean index and patchiness index. Inaddition, the identification of clones and their spatial distribution is neccessary to study the dynamics and evolution of clonal plant population. Therefore, clonal structure and clonal diversity of four from the eight Siraitia grosvenorii populations were inferred from random amplified polymorphic DNA(RAPD) markers. The purpose of this study is to infer the spatial pattern of natural Siraitia grosvenorii populations and analysis the reason to provide a theoretical basis for the biological characteristics of Ecology; to understand the clonal diversity, clonal structure to further reveal its clonal growth process and based information of mechanisms of ecological adaptation. This study get to the conclusion thereinafter:1. The results showed that, in the larger space scales, Siraitia grosvenorii populations have different style of inlay distribution; the distribution patterns were random or clumped, and the intensity was different among different populations but was not high. The distribution of populations are influenced mainly by its biological characteristics and microtopography.2. A total of 351 plants sampled from four populations of eight were analyzed using 15...
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