第08章 叶类中药
叶类中药含义:Folium单叶;复叶的小叶,如番泻叶FoliumSennae;Cacumen嫩枝及叶,如侧柏叶等。1性状:浸泡在水中使之湿润并展开后观察其特征1.1药材特征:完整或破碎(桑叶)平坦(番泻叶)或皱缩(大青叶)颜色(紫苏下表面紫色)和斑点(桉叶,红色木栓斑点)质地:革质或纸质气味(大青叶、莱菔叶)1.2形态学特征:结构:单叶或复叶、有无叶鞘、托叶、叶翼、叶轴;叶柄的有无及长短、平直、槽状和扭曲等情况.形状:叶片呈卵圆形、披针形等;叶端、叶缘及叶基的情况.大小:长度及宽度.表面:有无毛茸、腺点、腺鳞等、叶脉的凹凸和分布情况.2显微鉴别上下表面片、横切片(纵切...
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