\r杜若\pd124.bmp\r
味辛，微温，无毒。主胸胁下逆气，温中，风入脑户，头肿痛，多涕泪出，眩倒目
（莫郎切），止痛，除口臭气。久服益精，明目，轻身，令人不忘。一名杜衡，一名杜莲
，一名白连，一名白芩，一名若芝。生武陵川泽及冤句。二月、八月采根，曝干。（得辛夷
、细辛良，恶柴胡、前胡。）
陶隐居云∶今处处有。叶似姜而有文理，根似高良姜而细，味辛香。又绝似旋覆根，殆
欲相
乱，叶小异尔。《楚词》云∶山中人兮芳杜若。此者一名杜衡，今复别有杜衡，不相似。唐
本注云∶杜若，苗似廉姜，生阴地，根似高良姜，全少辛味。陶所注旋覆根，即真杜若也。
臣
禹锡等谨按蜀本图经云∶苗似山姜，花黄赤，子赤色，大如棘子，中似豆蔻。今出硖州、
岭南者甚好。范子计然云∶杜衡、杜若，出南郡、汉中，大者大善。
图经曰∶杜若，生武陵川泽及冤句，今江湖多有之。叶似姜花赤色，根似高良姜而小辛
味，
子如豆蔻。二月、八月采根曝干用。谨按此草一名杜衡，而中品自有杜衡
条。杜衡，《尔雅》所谓土卤者也。杜若，《广雅》所谓楚衡者也。其类自别，然古人多相
杂引用。《九歌》云∶采芳洲兮杜若。又《离骚》云∶杂杜衡与芳芷。王逸辈皆不分别。但
云香草也。古方或用，而今人罕使，故亦少有识之者。
雷公云∶凡使，勿用鸭喋草根，真相似，只是味效不同。凡修事，采得后，刀刮上黄赤
皮了
，细
锉，用二、三重绢作袋盛，阴干。临使以蜜浸一夜，至明漉出用。尔雅一曰杜若，土卤，香
草也。
Du Ruo (Pollia japonica)
Pungent, slightly warm, non-toxic. Primarily treats rebellious Qi in the chest and hypochondrium, warms the Middle Jiao, wind entering the Naohu point (B10) causing head swelling and pain, excessive tearing and rhinorrhea, dizziness and falling, eye pain (pronunciation: Mo Lang qie), relieves pain, and eliminates bad breath. Long-term use benefits essence, brightens the eyes, lightens the body, and enhances memory. Also known as Du Heng, Du Lian, Bai Lian, Bai Qin, and Ruo Zhi. Grows in the streams and marshes of Wuling and Yuanju. Roots are harvested in February and August and dried in the sun. (Compatible with Xin Yi and Xi Xin; incompatible with Chai Hu and Qian Hu.)
Tao Hongjing states: It is found everywhere today. The leaves resemble ginger but have visible veins; the root resembles Galangal but is thinner, with a pungent and fragrant taste. It also closely resembles the root of Inula Flower, which may cause confusion, differing only slightly in leaf size. The "Chu Ci" says: "The person in the mountains, how fragrant is the Du Ruo." This plant is also named Du Heng, yet there is currently another plant named Du Heng that does not resemble it. The "Tang Ben Cao Zhu" states: Du Ruo seedlings resemble Lian Jiang, grow in shady places, and the roots resemble Galangal but completely lack pungency. The Inula root noted by Tao Hongjing is the true Du Ruo.
Minister Yuxi et al. respectfully note according to the "Shu Ben Tu Jing": The seedlings resemble Shan Jiang, flowers are yellow-red, fruits are red, about the size of a jujube pit, resembling Cardamom inside. Those produced in Xiazhou and Lingnan are of excellent quality. Fanzi Jiran states: Du Heng and Du Ruo originate from Nanjun and Hanzhong; those that are large are of the best quality.
The "Tu Jing" states: Du Ruo grows in the streams and marshes of Wuling and Yuanju, and is now common in the Jianghu region. Leaves resemble ginger, flowers are red, roots resemble Galangal but are less pungent, and fruits resemble Cardamom. Roots are harvested in February and August and dried for use. Respectfully noting, this herb is also named Du Heng, while the Medium Grade Materia Medica has a separate entry for Du Heng. Du Heng is what the "Erya" calls Tu Lu. Du Ruo is what the "Guangya" calls Chu Heng. Their categories are distinct, yet ancients often confused and cited them interchangeably. The "Jiu Ge" says: "Gathering fragrant herbs on the isle, Du Ruo." And the "Li Sao" says: "Mixing Du Heng with fragrant Angelica." Wang Yi and others did not distinguish between them, merely calling them fragrant herbs. Ancient prescriptions sometimes used it, but modern practitioners rarely use it, so few recognize it today.
Lei Gong states: When using, do not use the root of Ya Die, which looks very similar but differs in taste and efficacy. For processing, after harvesting, scrape off the yellow-red skin with a knife, finely chop, place in a bag made of two or three layers of silk, and dry in the shade. Before use, soak in honey overnight, strain out the next day, and use. The "Erya" states: One name is Du Ruo, i.e., Tu Lu, a fragrant herb.