Flowering Situation of Callicarpa japonica Thunb. and its Affecting Factors in a Sub-urban Secondary Forest

To clarify environmental conditions suitable for the flowering of Callicarpa japonica, we examined several factors. As a result, the sizes of C. japonica, the sum of the ratio of basal area of C. japonica to its competitors, and the slope angle of the habitat of C. japonica influenced the flowering. In the top two fitted generalized linear models, the sum of the ratio of basal area of C. japonica to its evergreen competitors within the radius of 4 m was selected as an explanatory variable. This suggests that the density of evergreen competitors within the radius of 4 m has influenced on the flowering of C. japonica.