DA QING YE

Names for Da Qing Ye
Pharmaceutical:	Folium Isatidis
Botanical:	Song Lan : Isatis tinctoria L. & Isatis indigotica Fort. (Cruciferae) Ma Lan : Baphicacanthus cusia Bremek (Acanthaceae) Lu Bian Qin : Clerodendron Cyrtophyllum Turcz. (Verbenaceae) Liao Lan : Polygonum tinctorium Ait. (Polygonaceae)
Other names:
Description:	Leaf of the following herbs.

Actions
Clears Heat; Expels toxins; Cools Blood; Resolves exanthema; ...

Origin of da qing ye
* Song Lan: Jiangsu, Anhui, Hebei, Henan, Zhejiang. * Ma Lan: Guangxi, Guangdong, Jiangxi, Southwest China. * Lu Bian Qin: Hubei, Hunan, Jiangxi. * Liao Lan: Hebei, Shanxi.;

Preparation of da qing ye
The drug is collected 2-3 times in summer and autumn, removed from foreign matter, and dried in the sun. The leaves can be used either fresh or dried.;

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