中文摘要：

在光学显微镜和扫描电镜下观察了禾本科（Poaceae）虎尾草属（Chloris Sw．）孟仁草（Chloris barbara Sw．）的花序发育过程，以寻找适于虎尾草群（Chloris group）分支分析的发育性状。结果发现了未见于成熟花序的23个发育性状。阐明孟仁草花序的本质是二级长侧枝包围平截的主轴构成指形花序。该类型花序仅见于单子叶植物和少数高度特化的双子叶植物。涉及花序分枝的分子遗传机制研究亟待开展。

英文摘要：

In order to look for developmental features for future chdistic studies of Chloris group （Chloris, Cynodon, Eleusine, Dactyloctenum, and Microchloa etc.）, digitate inflorescence development in Chloris barbara had been examined under light and scanning electron microscope. Twenty-three developmental features indiscernible in the mature inflorescence were found. The structure of digitate inflorescence of Chloris barbara show that several secondary long axes circle the truncated main axis in the branch system. This type of inflorescence branch system has been reported only in monocotyledons and few highly specialized dicotyledonous group. To clarify whether the branch primordia are derived from a part of the shoot apical meristem and/or axillary meristems, studies on the genetic control of grass inflorescence architecture involved in branching are imperative.