关键词: 扁穗牛鞭草, 居群, 形态变异, 模糊聚类

Abstract: populations of H. compressa(L. F.) R. Br. originated from different habitats in Sichuan province were collected and cultivated in the experimental farm of Sichuan agricultural university with the same cultural method in November of 2002, of which 15 morphological characters were observed and classified with fuzzy cluster analysis. When the confidence level(λ) is 0.8197, 22 populations can be divided into four groups with significant difference from each other. It approves that there is rich morphological diversity of wild populations of H. compressa collected in Sichuan province. The appearance of principal characters and the utilization potential in each group are also discussed in this paper.

Key words: Hemarthria R. Br., population, morphological differentiation, fuzzy cluster