The objectives of this study are to determine the quantitative, qualitative characters and biomass structure of population component for sixty cloned wild Hemarthria Compressa. The results showed that diversities existed among quantitative characters in the different population components. The coefficient of variation (CV) for leaf length, leaf width, leaf number of each tiller and leaf number of each cloned plant was 24.95%, 20.00%, 14.12%, 43.56%, respectively. The CV for stem diameter, eustipes diameter, eustipes length, eustipes number of each tiller, the length and number of stem and stolon was 21.11%, 22.42%, 20.10%, 12.14%, 46.73%, 20.14%, 72.76%, 37.97%, respectively. The CV for root length, root distribution, roots area were 9.81%,37.65%, 33.68%, respectively. The CV for the length, width and thickness of inflorescence, inflorescence number of each tiller, the ratio of stem to seminal branch and the ratio of stolon to seminal branch were 13.33%, 13.42%, 14.80%, 36.10%, 118.96%, 81.44%, respectively. Meanwhile, the significant diversity for biomass structure in different population components in this study was found to be great. The CV of biomass for leaf, stem, root and inflorescence was 78.51%, 91.66%, 45.64%, 192.24%, respectively. The genetic diversity among the ecotype and environmental suitability of these ecotypes are very beneficial for improved cultivars.