Morphological and Histological Identification of Chinese Crude Drug Shanziwan (The Radix and Rhizome of Ligularia ) (Ⅰ)

The comparative morphological and histological studies on the Chinese crude drug Shanziwan derived from the radix and rhizome of Ligularia fischeri (Ledeb.) Turcz.,L.hodgsonii Hook. , L. intermedia Nakai , L.wilsoniana (Hemsl.) Greenm. , L.sibirica(L.) Cass.var. araneosa DC. , L. veitchiana(Hemsl.) Greenm. , L. caloxantha (Diels.) Hand. - Mazz. were carried out and illustrated with diagrammatic and detailed draw ings. A table for morphological comparison and a key for microscopical identification are also presented.