宽叶山蒿叶和艾叶的微形态鉴别

【目的】对宽叶山蒿叶和艾叶进行研究，为其鉴别提供微形态资料。【方法】利用数码相机、光学显微镜和扫描电子显微镜对其叶脉、叶表面和粉末特征进行研究。【结果】（1）强光背景下，只有宽叶山蒿叶各级叶脉能清晰观察到。（2）腺毛只分布于宽叶山蒿叶的下表面，而艾叶上、下表面均有大量腺毛。（3）和艾叶相似，宽叶山蒿叶下表面也密被T 形非腺毛，顶细胞有2 种：一种顶细胞呈长梭形而弯曲，平均长度约1450 μm（I 型）；另一种顶细胞细长,扁平且扭曲，平均长度约2800 μm（II 型），超过艾叶的1700μm。（4）宽叶山蒿叶肉组织中草酸钙簇晶较少，且最大只有10 μm。【结论】 研究发现，宽叶山蒿和艾的叶脉微形态特点及其叶上表面腺毛的有无特征可用于两者叶的快速鉴别。

Micromorphology Identification of Artemisia stolonifera and Artemisia argyi Leaves

Abstract: [Objective] Study the leaves of Artemisia stolonifera and Artemisia argyi to provide micro morphological data for their identification. [Methods] Digital camera, optical microscope, and scanning electron microscope were used to to study the characteristics of leaf veins, leaf surfaces, and powder. [Results] (1) Under strong light background, only the veins at all levels of Artemisia stolonifera leaves can be clearly observed. (2) Glandular trichomes are only distributed on the lower surface of the leaves of Artemisia argyi, and there are a large number of glandular trichomes on both the upper and lower surfaces of Artemisia argyi leaves. (3) Similar to Artemisia argyi leaves, the lower surface of Artemisia stolonifera leaves is also densely covered with T-shaped non-glandular trichomes, and there are two types of apical cells: one is a long spindle-shaped and curved apical cell, with a average length about 1450 μm (Type I); the other type of apical cell is long and thin, flat and twisted, with an average length of approximately 2800 μm (Type II), exceeding 1700 μm of Artemisia argyi leaves. (4) There are fewer calcium oxalate cluster crystal in the mesophyll tissue of Artemisia stolonifera leaves, with a maximum of only 10 μm. [Conclusion] Research found that the micromorphological characteristics of the leaf veins and the presence or absence of glandular trichomes on the upper surface of the leaves of Artemisia stolonifera and Artemisia argyi can be used for rapid identification of the two leaves.