濒危植物庙台槭生殖生物学研究1.花序和花的形态及发育

庙台械的花序为有限花序，由一顶花和6—9枝侧花枝组成，属圆锥状聚伞花序。一个花序共有14—29朵花，包括两性花、雄花和无性花三类花。根据花在花序上着生的位置，可分为三级。7月初，花序原基形成，在花序轴伸长的同时，侧面形成侧花枝轴原基。花序的顶花最早进行个体发育，随后是侧花枝顶花；侧花枝上同一级花的发育顺序则是从花序的下面向上进行。花器官发生时，花萼原基最先形成，然后是花瓣、雄蕊、心皮和胚珠。

STUDIES ON THE REPRODUCTIVE BIOLOGY OF A CHINA RARE PLANT-ACER MIAOTAIENSE1. MORPHOLOGY AND DEVELOPMENT OF INFLORESCENCE AND FLOWER

The inflorescence of Acer miaotaiense P. C. Tsoong is a kind of determinate type,which is composed of a terminal flower and 6-- 9 lateral branching axes and it is defindedas paniculate--cyme. An inflorescence contains 14-- 29 flowers and includes three types offlowers (bisexual,male and asexual flowers). In accordance with their position atinflorescence, flowers can be distinguished into three classes. The initiation of inflorescenceoccurs at the beginning of July;as the rachis elongates,the lateral branching axesinitiate. Ontogeny of terminal flower of inflorescence begins first,then the terminal flower ofbranching axes. Development sequence of the same class flowers of branching axes isfrom lower to upper portion of inflorescence. During floral organogenesis,primordia ofsepals form first,then petals,stamens,carpels and ovaules. Floral buds become dormantat the end of September.