Gynostemma pentaphyllum is a dioecious species with male-biased sex ratio in natural condition. In this paper, the authors
examined foraging behavior and reproductive strategies in the species in the same habitat based on the methods of comparative ecology. The preliminary results and conclusions are shown as follows:(1)the ratio of biomass allocation to main branch in the male population is obviously more than that in the female population,which implies the vegetative
reproduction in the male population enhance greatly. In contrast, there are not much different in the ratios of biomass alocation to other parts between the populations;(2)the significant differences in specific leaf area and leaf area ratio between the female and male populations were closely related with the process of reproduction of them;(3)there were significant differences in reproductive characters between populations;(4)most of the variance coefficients in male population are more than those in female population;and(5)male-biased sex ratio amy be related with lower reproductive cost, higher reproductive efficiency and potential,and higher vegetative reproductive effort of the male population.