（《唐本草》）
【集解】恭曰∶狗舌生渠堑湿地，丛生，叶似车前而无纹理，抽茎开花，黄白色。四月、
五月采茎，曝干。
【气味】苦，寒，有小毒。
【主治】蛊疥瘙疮，杀小虫。为末和涂之，即瘥（苏恭）。
（《别录》下品）
【校正】并入《图经》龙牙草。
【释名】龙牙草（《图经》）、凤颈草。
恭曰∶穗类鞭鞘，故名马鞭。
藏器曰∶此说未近，乃其节生紫花如马鞭节耳。
时珍曰∶龙牙、凤颈，皆因穗取名。苏颂《图经》外类重出龙牙，今并为一。又今方士
谬立诸草为各色龙牙之名，甚为淆乱，不足凭信。
【集解】弘景曰∶村墟陌甚多。茎似细辛，花紫色，叶微似蓬蒿也。
恭曰∶苗似野狼牙及茺蔚，抽三、四穗，紫花，似车前，穗类鞭鞘，都不似蓬蒿也。
保升曰∶花白色，七月、八月采苗叶，日干用。
颂曰∶今衡山、庐山、江淮州郡
皆有之。苗类益母而茎圆，高二、三尺。又曰∶龙牙草生施州，高二尺以来。春夏有苗叶，
至秋冬而枯。采根洗净用。
时珍曰∶马鞭下地甚多。春月生苗，方茎，叶似益母，对生，夏秋开细紫花，作穗如车
前穗，其子如蓬蒿子而细，根白而小。陶言叶似蓬蒿，韩言花色白，苏言茎圆，皆误矣。
苗叶
【气味】苦，微寒，无毒（保升）。大明曰∶辛，凉，无毒。
权曰∶苦，有毒。伏丹砂、硫黄。
【主治】下部 疮（《别录》）。症癖血瘕，久疟，破血杀虫。捣烂煎取
空
亨）。捣涂痈肿及蠼 尿疮
【附方】旧六，新九。
疟痰寒热∶马鞭草捣汁五合，酒二合，分二服。（《千金方》）
鼓胀烦渴，身干黑瘦∶马鞭草细锉，曝干，勿见火。以酒或水同煮，至味出，去滓温服。
以六月中旬，雷鸣时采者有效。
大腹水肿∶马鞭草、鼠尾草各十斤，水一石，煮取五斗，去滓，再煎令稠，以粉和丸大
豆大。每服二、三丸，加至四、五丸，神效。（《肘后方》）
男子阴肿大如升，核痛，人所不能治者∶马鞭草捣涂之。（《集验方
妇人疝痛，名小肠气∶马鞭草一两，酒煎滚服，以汤浴身，取汗甚妙。（《纂要奇方》）
妇人经闭，结成瘕块，肋胀大欲死者∶马鞭草（根苗）五斤（锉细）。水五斗，煎至一
斗，去滓，熬成膏。每服半匙，食前温酒化下，日二服。（《圣惠方》）
酒积下血∶马鞭草（灰）四钱，白芷（灰）一钱，蒸饼丸梧子大，每米饮下五十
玄方》）
金方》）马喉痹风，深肿连颊，吐气数者∶马鞭草一握，勿见风，截去两头，捣汁饮之，良。
（《千金方》）
乳痈肿痛∶马鞭草一握，酒一碗，生姜一块，擂汁服，渣敷之。（《卫生易简方》）
白癞风疮∶马鞭草为末，每服一钱，食前荆芥、薄荷汤下，日三服。忌铁器。（《太平圣
惠方》）
人疥马疥∶马鞭草不犯铁器，捣自然汁半盏，饮尽，十日内愈，神效。
赤白下痢∶龙牙草五钱，陈茶一撮，水煎服，神效。（《医方摘要》）
发背痈毒，痛不可忍∶龙牙草捣汁饮之，以滓敷患处。（《集简方》）
杨梅恶疮∶马鞭草煎汤，先熏后洗，气到便爽，痛肿随减。（陈嘉谟《本草蒙筌》）
根
【气味】辛、涩，温，无毒。
【主治】赤白下痢初起，焙捣罗末，每米饮服一钱匕，无所忌。（苏颂）。
(From *Tang Bencao*)
[Collected Explanations] Su Gong stated: Goushe Cao (Dog-tongue Grass) grows in wetlands along ditches and moats, growing in clumps. Its leaves resemble those of Plantago asiatica (Cheqiancao) but lack visible veins. It sends up stems that bear flowers, which are yellowish-white. The stems are harvested in April and May and dried in the sun.
[Flavor and Properties] Bitter, cold, slightly toxic.
[Indications] For gu sores (parasitic skin lesions), scabies, and itching sores; kills small insects. Grind into powder, mix with a carrier, and apply topically for cure. (Su Gong)
(From *Bielu*, listed as Lower Grade)
[Correction] Merged with Longyao Cao (Dragon's Tooth Grass) from *Tujing*.
[Names] Longyao Cao (from *Tujing*), Fengjing Cao (Phoenix-Neck Grass).
Su Gong stated: The flower spikes resemble the leather sheath of a horse whip, hence the name Mabian Cao (Horse Whip Grass).
Lu Zangqi stated: This explanation is not quite accurate; it merely has purple flowers at its nodes, resembling the joints of a horse whip.
Li Shizhen stated: "Longya" (Dragon's Tooth) and "Fengjing" (Phoenix Neck) are named after the shape of the flower spikes. Su Song's *Tujing* redundantly lists Longya separately; I have merged them into one entry. Furthermore, contemporary practitioners erroneously assign various names of "Dragon's Tooth" to different herbs, causing great confusion, which is unreliable.
[Collected Explanations] Tao Hongjing stated: It is abundant in villages and along paths. The stem resembles Asarum (Xixin), the flowers are purple, and the leaves slightly resemble Artemisia capillaris or similar weeds (Penghao).
Su Gong stated: The seedlings resemble wild wolf-tooth grass and Leonurus japonicus (Chongwei). It produces three or four spikes of purple flowers, resembling the spike of Plantago asiatica and the sheath of a whip, completely unlike Penghao.
Su Baosheng stated: The flowers are white. The aerial parts and leaves are harvested in July and August and dried in the sun.
Su Song stated: It is now found in Hengshan, Lushan, and various prefectures in the Jianghuai region. The foliage resembles Leonurus japonicus but the stem is round, growing two to three chi high. He also stated: Longyao Cao grows in Shizhou, reaching over two chi in height. It has leaves in spring and summer, and withers in autumn and winter. The roots are harvested, washed clean, and used.
Li Shizhen stated: Mabian Cao grows abundantly on the ground. In spring, shoots emerge with square stems. Leaves resemble those of Leonurus japonicus and grow oppositely. In summer and autumn, it bears small purple flowers arranged in spikes resembling those of Plantago asiatica. The seeds are like those of Artemisia but finer. The roots are white and small. Tao's statement that leaves resemble Penghao, Han's statement that flowers are white, and Su's statement that stems are round are all errors.
[Flavor and Properties] Bitter, slightly cold, non-toxic (Su Baosheng). Meng Shen stated: Pungent, cool, non-toxic.
Li Quan stated: Bitter, toxic. Incompatible with Cinnabaris (Dansha) and Sulfur (Liu Huang).
[Indications] Sores in the lower body (*Bielu*). For zheng pi (abdominal masses), xue jia (blood stasis masses), chronic malaria; invigorates blood, kills parasites. Crush and decoct to take the juice (*Qianjin Fang*). Crush and apply topically for carbuncles and sores caused by earwig urine.
[Attached Prescriptions] Six old prescriptions, nine new prescriptions.
Malaria with phlegm, chills, and fever: Take five he of fresh juice from Mabian Cao, mixed with two he of wine, divided into two doses. (*Qianjin Fang*)
Distension with irritability and thirst, dry and emaciated black skin: Finely chop Mabian Cao, dry in the sun without fire. Decoct with wine or water until the flavor is extracted, strain, and take warm. Effective if harvested during thunderstorms in mid-June.
Abdominal edema (Da Fu Shui Zhong): Ten jin each of Mabian Cao and Salvia plebeia (Shuweicao), boiled in one shi of water down to five dou. Strain, then reduce further until thick. Mix with rice flour and make pills the size of soybeans. Take two or three pills per dose, increasing to four or five pills. Miraculous effect. (*Zhouhou Fang*)
Male genital swelling as large as a measuring cup, testicular pain, untreatable by others: Crush Mabian Cao and apply topically. (*Jiyan Fang*)
Female hernia pain, known as Xiao Chang Qi: One liang of Mabian Cao, decocted in wine and taken hot. Bathing the body with hot water to induce sweating is excellent. (*Zuoya Qifang*)
Female amenorrhea with mass formation, severe flank distension and pain: Five jin of Mabian Cao (roots and shoots), finely chopped. Decoct in five dou of water down to one dou. Strain and reduce to an extract. Take half a spoonful before meals, dissolved in warm wine, twice daily. (*Shenghui Fang*)
Blood in stool due to alcohol accumulation: Four qian of Mabian Cao (ash), one qian of Angelica dahurica (Baizhi) (ash). Make pills the size of wutong seeds using steamed dough. Take fifty pills with rice drink. (*Xuan Fang*)
Malignant throat obstruction with deep swelling extending to the cheeks and rapid breathing: One handful of Mabian Cao, protected from wind. Cut off both ends, crush, and take the juice. Good effect. (*Qianjin Fang*)
Breast abscess with swelling and pain: One handful of Mabian Cao, one bowl of wine, one piece of ginger. Grind to extract juice, drink the juice, and apply the residue topically. (*Weisheng Yijian Fang*)
White vitiligo-like sores: Powderize Mabian Cao. Take one qian per dose, washed down with Schizonepeta and Mentha tea before meals, three times daily. Avoid iron vessels. (*Taiping Shenghui Fang*)
Human and animal scabies: Do not let Mabian Cao touch iron. Crush to obtain natural juice, half a zhan. Drink completely; cured within ten days. Miraculous effect.
Dysentery (red and white): Five qian of Longyao Cao, a pinch of aged tea. Decoct in water and take. Miraculous effect. (*Yifang Jiaoyao*)
Back carbuncle with unbearable pain: Juice of Longyao Cao drunk, residue applied to the affected area. (*Jijian Fang*)
Kaposi sarcoma-like malignant sores (Yangmei E Chuang): Decoct Mabian Cao in water. Fume first, then wash. Relief comes upon contact with steam, and swelling/pain decreases. (Chen Jiamo, *Bencao Mengquan*)
Roots
[Flavor and Properties] Pungent, astringent, warm, non-toxic.
[Indications] Early stage of red and white dysentery. Roast, grind, and sieve into powder. Take one qian bi (a spoonful measure) with rice drink. No dietary restrictions. (Su Song)