Numerical Analysis of Population Morphological Differentiation of Disanthus cercidifolius in Jinggangshan
井冈山长柄双花木种群形态分化的数量分析

In this paper, the population morphological differentiations of Disanthus cercidifolius in Jinggangshan were studied with numerical analysis. The results show that: Among 20 kinds of patterns of 53 individuals in 5 communities, only 7 kinds have the obvious differentiation, in which 2 couples have reaches the extremely obvious level, 8 couples have revealed the direct relationship and 4 couples have inverse relationship. The results of the Variance and cluster analysis both show that the differentiation of the whole patterns has not reached obvious level in indivi- dual and community level. That is to say the pattern and character of Disanthus cercidifolius Maxim. var. Longipes Chang has slow reaction towards the environmental differentiation. The result of the analysis on the gray relatedness degree among morphological characters and environmental factors shows that among those environmental factors which are concerned, none can have the extremely leading role, different environmental factors can have different effects on the same character and the same environmental factors, result of the influence towards different character is also varied. The potential leading factors, which influence its growth, are the height above the elevation, value of soil pH and translucent rate of tree strata.