井冈山自然保护区栲树群落研究   总被引：1，自引：0，他引：1  

邓贤兰  黄彩霞  芦站根 《衡水学院学报》2005,7(1):15-17

以栲树群落8个样地调查资料为基础，对该群落的物种组成、区系成分和物种多样性进行了统计和分析，结果表明：栲树并落中有维管植物51科67属98种(含变种)；属的地理成分复杂，以热带成分为主，温带成分只占较少比例；乔木层、灌木层和草本层的各项物种多样性指标在群落各样地间均有一定的差异；在群落垂直结构中，灌木层的多样性指数最大，乔木层次之，草本层最小。  相似文献   

乌蒙杓兰及其近亲种   总被引：1，自引：0，他引：1  

陈心启 《中国科学院研究生院学报》1985,23(5):369-375

 In addition to describing a new species, Cypripedium wumengense, as well as a new variety, C. bardolphianum var. zhongdianense,  nomenclatural and taxonomic notes are made on its allies and the division to which they belong.  They are ltrge]y found in the Hengduan Mountains in southwestern China, characterized by the absence of bract, havirg lip more or less covered with small wart-like outgrowths, and that as the capsule matures the scape becomes much elongated.  Six species of this group have hitherto been reported, of which, however, C. ebracteatum and C. nutans are regarded here as conspecific with C. fargesii and C. bardolphianum respectively. Thus, including the new taxa described here, it composes five species and one variety: C. bardolphianum W. W. Sm. et Farrer (var. bardolphianum and var. zhongdianense S. C. Chen), C. mic- ranthum Franch., C. fargesii Franch., C. margaritaceum Franch. and C. wumengense S. C. Chen.  They are all grouped here into the same section, Sect.  Trigonopedium (Franch.) Pfitz., the oldest legitimate name of this group in the rank of section.  相似文献