Microscopic identification: root cross section: cork layer is thick. Phloem stenosis. There are many xylem, 2 ~ 8 groups of vessels, arranged radially, and phloem between trees. The parenchyma cells contain calcium oxalate sand crystals.
Physical and chemical identification: take 65438±0g of this product powder, put it in a cold conical flask, moisten it with ammonia water, add 20mL of chlorhexidine after 65438±05min, soak it in cold overnight, and filter. Take 5mL of filtrate, put it in an evaporating dish, put it in a boiling water bath for evaporation, add a few drops of fuming nitric acid, and the color of the residue pool will be the same after evaporation. Add 1 ~ 2 drops of absolute ethanol and 1 granular potassium hydroxide to make it purple. (check atropine alkaloids-).
Identification of medicinal materials: most of the dried roots are flaky, gray, round or oval, with a diameter of 7 ~ 12 cm and a thickness of about 5 mm, with obvious annual rings and radial vascular bundles. It is easy to break, and dust will fly out when it is broken. It tastes bitter. Preferably a large and thin film. Microscopic identification: root cross section: cork layer is thick, phloem is narrow, xylem is wide, accounting for most of the root, and there are 2 ~ 8 groups of ducts, which are arranged radially and sparsely; There is phloem between trees; The ray width is 7 ~ 18 cells. There are many sand crystal cells scattered in wood products.
Identification of the same species: In addition to the original plant Himalayan centipede used in Lijiang, Yunnan, there are the following kinds: centipede alias: Qilisan (Yunnan) Solanaceae. Perennial herb, 50 ~ 100 cm tall, glabrous. The roots are thick. Leaves alternate, petiole length 1 ~ 2 cm; The leaves are ovoid or oblong, 6-20 cm long and 3- 12 cm wide, and are entire or microwave-shaped. Flowers are solitary in leaf axils, pale yellow and green, drooping, and pedicels are 3 ~ 5 cm long; Calyx is swollen, about 2cm long, irregularly 5-lobed, and grows into a nearly spherical shape after flowering, surrounding the fruit, and the longitudinal veins are not obvious; Corolla is swollen, about 4.5 cm long, 5 teeth, outward when flowering, with deep purple spots near the inside of the base; Stamens 5, inserted at the base of corolla, about half of corolla; The pistil is slightly longer than the stamen; The disc is disc-shaped. Capsule is nearly spherical, cracked, calyx tightly wraps the fruit, and longitudinal veins are thick and obvious. The flowering period is from May to June, and the fruiting period is10 ~165438+1October. Born in hillside grassland or forest at an altitude of 3000 ~ 3600 meters. Distributed in Deqin, Zhongdian, Weixi, Muli, Sichuan and other places in northwest Yunnan. Scolopendra scoparia var. dentata c.y.wu et c.chen, which is similar to scopolamine in morphology and also used for medicine, has basically the same growth area. The main morphological differences are: there are 1 ~ 2 thick teeth on the leaf edge of scoparia dentata, and deep purple stripes on the back of corolla eaves. Anisodamine Lijiang alias: three points three (Yunnan). Anise. Wu Hechen, a plant of Euphorbia. ) ── Solanaceae. The main difference between this species and trifoliate leaves is that the plant body is covered with hair, and the calyx and pedicel are densely covered with light brown hair; There are 1 ~ 2 pairs of coarse teeth in the upper leaf margin of the stem. Flowers bloom in June. Born in slopes or bushes at an altitude of 2800 ~ 3 100 meters. Distributed in northwest Yunnan, Tibet and other provinces.