Abstract: Comparative anatomy on the leaf transverse section of 12 species belonging to Amomum was studied by paraffin method.The results showed that the epidermis consists of one layer of epidermal cells.Epidermal cells of adaxial side are usually wide and tall in species with no hypodermis, while epidermis was thin with cell wall thickening in species with hypodermis.The structure of hypodermis kept diversity in different taxa.Always, palisade cells in mesophyll consist of 1-2 layers and spongy cells of 2-6 layers.Moreover, tannin occurs commonly in mesophyll and crystals are also present in most species examined.The morphology of extreme vascular bundle at midrib phloem is various, but the vascular bundle system II is generally absent, and no species examined appears all four systems at the same time.Finally, the morphological characteristics of leaf margin were synoptically described.In addition, based on the diagnostic characters and the previous research, the systematic significance of the anatomical structure of leaves was also discussed in this paper.

Key words: Zingiberaceae, Amomum, leaf, anatomy

摘要： 采用石蜡切片法对豆蔻属12个种的叶片横切面结构进行比较解剖学研究。结果显示:豆蔻属植物叶片表皮层由1层表皮细胞组成,在无下皮层的种中,近轴面的表皮细胞通常体积较大,而在有下皮层的种中,表皮层通常较薄,细胞壁增厚;下皮层的结构具有多样性;叶肉中栅栏组织通常1~2层,海绵组织2~6层细胞,常含丹宁,所观察的大部分种含有方晶或砂晶;中脉韧皮部极端维管束形态多样,维管束系统II通常缺失,未发现同时具有4个系统的种。此外,对叶缘的形态特点进行了概括性描述,并结合前人的研究资料讨论了叶解剖结构的系统学意义。

关键词: 姜科, 豆蔻属, 叶, 解剖学