耧斗菜属花部形态发生

用扫描电镜观察了无距耧斗菜（Ａｑｕｉｌｅｇｉａ ｅｃａｌｃａｒａｔａ Ｍａｘｉｍ ．）和北美耧斗菜（Ａ． ｃａｅｒｕｌｅａＪａｍ ｅｓ．）雄蕊群和雌蕊群的发生过程，并在光学显微镜下检查了同一雄蕊群不同轮雄蕊小孢子发育的顺序． 发现耧斗菜属雄蕊群的发生是向心发生，而小孢子发育和花药成熟顺序是离心的． 说明该属雄蕊群离心发育是次生现象；它在不同类群中出现，可能具有平行演化的性质，其系统学价值尚需重新评价

FLORAL MORPHOGENESIS OF AQUILEGIA L. (RANUNCULACEAE)

The androecial and gynoecial initiation in Aquilegia ecalcarata Maxim. and A. caerulea James. were observed under scanning electron microscope (SEM). Also the microspore developmental sequence of different whorls of stamens in the same androecium was examined under the light microscope (LM). It was shown that the androecial initiation was centripetal, whereas the microsporogenesis and anther maturation were centrifugal. Thus, the centrifugal development of androecium in this genus was a secondary phenomenon. The authors considered that as has been reported centrifugal development of androecium appeared in different groups could be parallel to centripetal development in the course of evolution, of which the phylogenetic significance merits further approach.