【摘要】 该文对北京林业大学苗圃内发现的一文冠果的同源异型自然变异株进行了形态及解剖学观察．结果发现：这一花器官变异植株的花明显小于正常株的花，且不能完全开放，始终呈半开状．花重瓣多轮，仅具花萼和花瓣，不具雄蕊和雌蕊．因为雄蕊和雌蕊全部特化为花瓣状，部分特化的内轮花瓣上留有花药的残迹，花药内的花粉发育是不正常的．与此相关的营养体特征是变异株的叶片大，厚且颜色呈深黑绿色．更多还原

【Abstract】 A natural homeotic mutant of Xanthoceras sorbifolia was discovered in seedling nursery of Beijing Forestry University. A morphological and anatomical research on its mutant flowers and leaves was carried out. The results show that:the size of mutant flowers is much more smaller than normal flowers of Xanthoceras sorbifolia, and those abnormal flowers can’t come into bloom. There are only calyx and petal, no stamens and pisitil in mutant flowers. Both stamens and pisitil are petaloid, so the abnormal flowers are double flowers. There are some malformed anthers on those pieces of inner petals and no normal pollen found in these abnormal anthers. The corresponding vegetative characteristic of the mutant is that the dark green mutant leaves are larger and thicker than normal leaves.更多还原