Abstract: The comparative anatomy of the leaves of 7 species in Polygonatum Mill . is studied in this paper. The results are as follows: (1) The raphide idioblasts are common in these species from Anhui province , but their number is different each other ; (2) No hairs on epidermis except lower epidermis of P. odoratum; ( 3) Stomatal apparatus only distribute in lower epidermis in random and single except P. ganlandeianense has both single and two or three get together ; (4) No differentiation of palisade tissue and the spongy tissue in the leaves except P. anhuiense and P. zanlanscianense have inconspicuous one . ( 5) Some stomatal apparatus characters such as size , type, distribution and shape of surface cells show more or less difference among the species . These characters provide experimental evidence for division of species and systematic evolution relationships of Polygonatum Mill .

Key words: Polygonatum

摘要： 对安徽黄精属(Polygonatum Mill .) 7 种植物的叶片进行了比较解剖学研究。结果表
明: ( 1) 7 种黄精属植物叶肉细胞中普遍存在含针晶束的异细胞, 其数量多少存在种间差
异; ( 2) 除玉竹( P. odoratum) 的下表皮外, 叶表皮均无表皮毛的存在; (3 ) 仅下表皮有气
孔器分布, 除湖北黄精( P. ganlandeianens ) 既有单个散布也有2 个或3 个聚集后随机散布外, 均为单个随机散布在下表皮上; (4) 叶片无栅栏组织和海绵组织的分化, 除湖北黄精和
安徽黄精( P. anhuiense) 的叶片有不显著的栅栏组织和海绵组织的分化; (5) 气孔器的某些特征, 如气孔器大小、气孔器分布、气孔器类型等特征以及表皮细胞形状和垂周壁式样在种
间有一定的差异。上述特征为黄精属植物种的划分及系统演化关系的探讨提供实验证据。

关键词: 黄精属, 叶片, 比较解剖学FONT