Search

用扫描电镜观察了少花薹草组Carex sect. Paniceae（莎草科）26种3变种的果囊形态和微形态特征。结果表明：（1）果囊形状（喙除外）为倒卵球形、椭球形或卵球形，均为钝三棱状，果囊长度为1.99~7.27 mm，喙多弯曲（仅1种C. striatula果囊的喙直立），喙急缩或渐缩，喙长与果囊长度的比值为1/8~1/2，表皮细胞多明显隆起，极少数隆起不明显，且多数性状种内保持稳定；（2）喙口形态分斜截、平截、微二齿和二齿4类，且在种内有变异，如C. arakiana、线柄薹草C. filipes、丝柄薹草C. rouyana、C. purpurifera；（3）可根据果囊长度和喙的收缩情况区分部分近缘种，如线柄薹草与少囊薹草C. egena、浙江薹草C. zhejiangensis与显舌薹草C. macroglossa；（4）果囊长度、喙长与果囊长度的比值在sect. Paniceae s.s.与sect. Laxiflorae 2组间有显著差异，对两组的界定有一定价值；（5）被视为组或亚属重要分类性状的果囊横切形状（三棱状或双凸状）在界定少囊薹草组与相关组时无意义，果囊形态对界定少花薹草组有重要的系统学意义。

Copyright of Journal of Zhejiang University (Science Edition) is the property of Journal of Zhejiang University (Science Edition) Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)