大叶白头翁，中药名。为菊科植物珠光香青Anaphalismargaritacea（L.）Benth.etHook.f.的带根全草。具有清热泻火，燥湿，驱虫的功效。主治吐血，胃火牙痛，湿热泻痢，蛔虫病，乳痈，瘰疬，臁疮。
Da-ye-bai-tou-weng, name of Chinese Medicinal Material. s the whole plant with roots of Anaphalismargaritacea (L.) Benth.etHook.f., a plant of the Asteraceae family. It has the effects of clearing heat, purging fire, drying dampness, and expelling parasites. It is mainly used to treat vomiting blood, toothache due to stomach fire, damp-heat diarrhea, roundworm disease, breast abscess, scrofula, and sores.

功效作用 功能
Efficacy and Functions

清热泻火，燥湿，驱虫。主治
Clearing heat, draining fire, drying dampness, and expelling parasites. Mainly used for治疗。

吐血，胃火牙痛，湿热泻痢，蛔虫病，乳痈，瘰疬，臁疮。用法用量
Hematemesis, stomach fire causing toothache, damp-heat diarrhea, roundworm disease, breast abscess, scrofula, and anal fistula. Dosage and administration.

内服：煎汤，10-30g。外用：适量，捣敷；或研末调敷。化学成分
Internal use: Decoction, 10-30g. External use: Appropriate amount, pounded for application; or ground into powder for application. Chemical components.

1、地上部分含黄酮。2、全草含多炔化合物：十三碳五炔烯、反式去氢母菊酯、5-氯-2（2,4,6-亚辛三炔基）-5，6-二氢-2H-吡喃。相关论述

1. The above-ground parts contain flavonoids.2. The whole plant contains polyacetylene compounds: tridecadiene, trans-dehydrocostus lactone, 5-chloro-2-(2,4,6-trimethyl-3-pentynyl)-5,6-dihydro-2H-pyran. Related discussions.

1、《分类草药性》：“治一切劳伤，牙痛，吐血，痢症。”2、《贵州民间药物》：“清热，止痢，驱虫，外治刀伤。”3、《青岛中草药手册》：“清热解毒，祛风通络。治跌打损伤，风寒腿痛，腹泻，痢疾，臁疮。”临床应用 相关配伍

1. "Classified herbal properties: used for treating all kinds of fatigue, toothache, vomiting blood, and dysentery."2. "Folk medicines in Guizhou: clears heat, stops dysentery, expels parasites, and externally treats knife wounds."3. "Qingdao Herbal Handbook: clears heat, detoxifies, dispels wind, and promotes circulation. Used for treating bruises, wind-cold leg pain, diarrhea, dysentery, and anal fistula." Clinical applications and related compatibility.

1、治牙痛：①治风火牙痛：大火草60g。煎水炖五花肉合糖服。②治寒火牙痛：大火草120g，桂花根60g。水煎服。（《重庆草药》）2、治痢疾：山萩、野棉花根各9g。煎水服。（《贵州民间药物》）3、治蛔虫病：①山萩3g（1-3岁用量）。煎水服，每日服2次，饭前服。如虫未下，隔2天后再服，以虫下为度。（《贵州民间药物》）②火草12g，仙鹤草、野花椒各9g。水煎服。（《万县中草药》）4、治乳痈：大火草与蒲公英合用，捣烂包。初起有效。（《重庆草药》）5、治瘰疬疮毒：火草、红玉簪根（去皮）各适量。捣绒外敷。（《万县中草药》）6、治黄水疮，臁疮：避风草焙黄研末，撒于疮面或香油调敷。7、治跌打损伤：避风草捣成绒，醋调外敷。（6-7方出自《青岛中草药手册》）8、治刀伤：山萩适量。晒干研末，敷伤处。（《贵州民间药物》）加工炮制 采收加工

1. Treatment for toothache: - For toothache caused by excess heat: 60g of Da Huo Cao. Decoct with water and stew with pork belly and sugar for consumption. - For toothache caused by cold and heat: 120g of Da Huo Cao, 60g of Guihua Gen. Decoct with water for consumption. (From "Chongqing Herbal Medicine")2. Treatment for dysentery: - 9g each of Shan Qiu and wild cotton root. Decoct with water for consumption. (From "Guizhou Folk Medicine")3. Treatment for roundworm disease: - For children aged 1-3: 3g of Shan Qiu. Decoct with water for consumption, twice a day before meals. If worms are not expelled, repeat the treatment every other day until they are expelled. - 12g of Huo Cao, 9g each of Xianhe Cao and wild Sichuan pepper. Decoct with water for consumption. (From "Wanxian Herbal Medicine")4. Treatment for breast abscess: - Da Huo Cao and dandelion used together, mashed and applied as a poultice. Effective in the early stages. (From "Chongqing Herbal Medicine")5. Treatment for scrofula and ulcerous sores: - Appropriate amounts of Huo Cao and Hongyuzan Gen (peeled). Crush and apply externally. (From "Wanxian Herbal Medicine")6. Treatment for eczema and ulcers: - Bake and grind Bifeng Cao into a yellow powder, sprinkle on the affected area or mix with sesame oil for application.7. Treatment for bruises and injuries: - Crush Bifeng Cao into a fluff, mix with vinegar and apply externally. (From "Qingdao Herbal Medicine Handbook")8. Treatment for knife wounds: - Appropriate amount of Shan Qiu. Sun-dry, grind into powder, and apply to the wound. (From "Guizhou Folk Medicine")Processing and preparation: Harvesting and processing.

夏季花苞初放时连根挖起，去净泥沙，晒干或鲜用。植物学信息 植物种属
When the flower buds start to bloom in summer, they should be dug up with roots, cleaned of mud and sand, and then dried in the sun or used fresh. Botanical information: Plant species.

菊科香青属珠光香青。形态特征
Chrysanthemum indicum belongs to the genus Chrysanthemum in the Asteraceae family. Morphological characteristics.

多年生草本，高30-70cm。密被白色绵毛。根状茎横走或斜升，木质。单叶互生，稍革质；无柄；叶片线状披针形，长约8cm，宽约1.5cm，先端渐尖，有小尖头，基部稍狭，常抱茎，边缘平，上部叶渐小，上面被蛛丝状毛，下面被灰白色至红褐色厚绵毛。头状花序多数，在茎和枝端排列成复伞房状；花序梗长4-17mm；总苞钟状或半球状，长5-8mm，径8-13mm；总苞片5-7mm；总苞钟状或半球状，长5-8mm，径8-13mm；总苞片5-7层，白色，干膜质，最内层线状倒披针形，宽0.5mm，有长达全长3/4的爪部；花托蜂窝状；雌株头状花序外围有多层雌花，中央有3-20雄花；雄株头状花序，有雄花或外围有极少数雌花；花冠长3-5mm，冠毛比花冠稍长。瘦果长椭圆形，长0.7mm，有小腺点。花、果期8-11月。分布区域
Perennial herb, 30-70cm tall. Covered densely with white woolly hairs. Rhizome running horizontally or obliquely, woody. Leaves simple, opposite; slightly leathery; sessile; linear-lanceolate, about 8cm long, 1.5cm wide, gradually pointed at the apex with a small tip, slightly narrowed at the base, often embracing the stem, flat margin, upper leaves gradually smaller, upper surface with cobweb-like hairs, lower surface with thick woolly hairs ranging from gray-white to reddish-brown. Capitula numerous, arranged in compound umbel-like corymbs at the stem and branch tips; peduncles of capitula 4-17mm long; involucre campanulate or hemispherical, 5-8mm long, 8-13mm in diameter; involucral bracts 5-7mm long; involucre campanulate or hemispherical, 5-8mm long, 8-13mm in diameter; involucral bracts 5-7 layers, white, membranous, innermost linear-lanceolate, 0.5mm wide, with a claw up to 3/4 of the total length; receptacle honeycombed; female capitula with multiple layers of female flowers on the periphery and 3-20 male flowers in the center; male capitula with male flowers or very few female flowers on the periphery; corolla 3-5mm long, corolla hairs slightly longer than the corolla. Achene elongated-elliptic, 0.7mm long, with small glandular dots. Flowering and fruiting period from August to November. Distribution area: [missing information]

分布于湖北、四川、贵州等地。生长环境
Distributed in Hubei, Sichuan, Guizhou, and other regions. Growing environment.

生于向阳山坡及田野。
Born on sunny slopes and fields.