Rehmannia glutinosa

Radix Rehmanniae

Chinese fox gloveroot

[alias] jiuhuhua, Shanyan, Shanyan and shancai.

[source] the tuberous roots of Rehmannia glutinosa Libosch.

[plant morphology] perennial herb with white villous and glandular hairs. The base of the leaf is clumped, obovate lanceolate, the base is narrowed into a stalk, the edge has irregular obtuse teeth, the leaf surface is shrunk, and the lower part is purplish. Inflorescence racemose; calyx 5-lobed; corolla bell shaped, slightly 2-lipped, purplish red, yellow with purple stripes on the inner surface. Capsule globose or ovoid, with persistent calyx and style. The flowering period is from April to June and the fruiting period is from July to August.

Born on hillside, ridge and roadside. It is mainly produced in Henan, Liaoning, Hebei, Shandong and Zhejiang.

[harvest] in autumn, the fresh rehmannia glutinosa is obtained by removing the reed head and fibrous roots; the roots are baked and melted to 80% dry, and the inside turns black and kneaded into a mass; the raw Rehmannia glutinosa is obtained by fumigating until it is black and moist; the cooked Rehmannia glutinosa is obtained by fumigating the raw Rehmannia glutinosa.

[traits] fresh rehmannia glutinosa is spindle shaped or cylindrical, often constricted in the middle to form a continuous bead; its surface is light orange, with wrinkles, pores and bud marks; its flesh is easy to break, its cross section is yellow white, and its skin has orange red dots; its taste is slightly sweet and slightly bitter. Rehmannia glutinosa is irregular and massive; its surface is grayish brown or brownish black, extremely wrinkled; its quality is tough, its cross section is brownish black, glossy and sticky; its taste is slightly sweet.

[chemical constituents] it contains Catalpol, amino acids and sugars, mannitol, β - sitosterol and campesterol.

[nature and taste] fresh, cold, sweet and bitter. Rehmannia glutinosa is cold in nature and sweet in taste.

[indications] fresh rehmannia glutinosa can clear away heat and generate fluid, and stop bleeding after cooling; it is used for Yin injury caused by hot wind, sore tongue, rash, hematemesis, bleeding, sore throat. Rehmannia glutinosa can clear away heat and cool blood, nourish yin and generate body fluid; it is used for febrile diseases, such as febrile thirst, rash, yin deficiency, internal heat, hematemesis, bleeding, diabetes and infectious hepatitis.