Drug identification
Traits
The entire length of 15-35cm, often tangled into a group. Small roots, lateral slender fibrous roots. Rhizomes slender cylindrical, 1-2mm in diameter; surface yellowish or yellowish brown, with fine vertical stripes. Stalks are slender, branched, gray-green, and obvious. The leaves are alternate, sessile, and the leaves are mostly shriveled and greenish-brown. After flattening, the leaves are narrowly lanceolate or long and small, solitary in leaf axils; the corolla is basally commissive, with an upper five-cleft, one-sided. Gas slightly, slightly sweet and pungent. Stems and leaves with green and yellow roots are preferred.
Microscopic identification
1, the surface of the leaf surface of the epidermis cells around the vertical wall of microwave-like, stomatal slightly prominent, indefinite, 3-7 secondary guard cells.
2. The epidermis of the cross-section of the rhizome is a column of cells; the exoskeleton is wavy and curved. The cortex is broad, fine manure contains inulin and a few calcium oxalate clusters; the inner cortex is obvious. The middle column is small and there are milk cells scattered in the phloem: the xylem vessels are arranged slightly radially. There is marrow.
chemical composition
The whole plant contains alkaloids, mainly L-olbeline, olebelanine, lobelanidine, isolobelanine, ketosine, Flavonoids, saponins, acid, polysaccharides. Inu-lin, p-hydroxy-benzoic acid, fumaric acid and succinic acid have also been reported. The rhizome contains lobeli-nin.
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