Pharmaceutical name: 英文藥名﹕	Rhizoma Guanzhong
Botanical name: 學名﹕	Dryopteris crassirhizoma Nakai (馬鱗毛蕨) Woodwardia unigemmata (Makino) Nakai (頂芽狗脊蕨) Osmunda japonica Thunb.(紫萁 ) Matteuccia struthiopteris (l.) Todaro (莢果蕨)
Pron. in Japanese: 日語發音﹕	kanju
Pron. in Korean: 韓語發音﹕	kwanjung
Pron. in Cantonese: 粵音﹕	gun3 zung3
Other Names: 別名﹕	dong bei guan zhong 東 北 貫眾  (馬鱗毛蕨), 萹荷、貫節、貫忡、貫渠、虎卷。
Common Name: 英文名﹕	dryopteris root, shield-fern
Distribution: 產地﹕	Heilongjiang, Jilin, Liaoning (Dryopteris), Hunan, Yunnan, Guizhou (Woodwardia), Henan, Gansu, Shandong, Jiangsu, Zhejiang, Sichuan (Osmunda), hebei, Henan, Shaanxi, and northeast China (Matteuccia) 黑 龍 江。  吉 林 ﹐  遼 寧 (馬鱗毛蕨)﹐ 湖 南 ﹐ 云 南 ﹐ 貴 州 (頂芽狗脊蕨)﹐ 河 南 ﹐ ﹐ 甘 肅 山 東 ﹐ ﹐ 江 蘇 浙 江 ﹐ 四 川  (紫萁 )﹐  河 北 ﹐  河 南﹐  陝 西 ﹐ 東 北 (莢果蕨)。
Properties (characteristics)﹕ 性味﹕	bitter, slightly cold, slightly toxic. 苦，微寒；有小毒。
Channels (meridians) entered:   歸經﹕	liver, spleen, stomach. 肝﹐ 脾 ﹐ 胃
Medical functions: 藥理﹕
Actions & Indications: 主治﹕	For:  abdominal pain due to parasites,  boils,  charcoal of guan zhong being use in arrest bleeding and for massive or incessant extramenstral vaginal bleeding. hepatitis B 用於 虫積 腹痛 瘡 瘍 貫 仲 炭止血，用于崩漏 乙 型 肝 炎
Chemical ingredients: 化學成份﹕
Dosage: 用量﹕	4.5 to 9 g 4.5 ~ 9 克 。
Samples of formulae :處方舉例﹕
Modern Research: 現代研究﹕
Toxicity & Cautions: 毒素與禁忌﹕	not to use during pregnancies or in patients with recent history of ulcers. 曾近有胃潰瘍者或懷孕期間忌用。