水龙，中药名。为柳叶菜科丁香蓼属植物水龙Ludwigiaadscendens(L.)Hara的全草。分布于福建、江西、湖南南部、广东、香港、海南、广西、云南南部。具有清热，利尿，解毒之功效。用于感冒发热，燥热咳嗽，高热烦渴，淋痛，水肿，咽痛，喉肿，口疮，风火牙痛；外用于疮痈疔肿，烫火伤，跌打伤肿，腮腺炎，带状疱疹，湿疹，皮炎，毒蛇咬伤。
Shui-long, name of Chinese Medicinal Material. the whole plant of Ludwigia adscendens (L.) Hara, a member of the family Onagraceae, is distributed in the southern parts of Fujian, Jiangxi, Hunan, Guangdong, Hong Kong, Hainan, Guangxi, and the southern parts of Yunnan. It has the functions of clearing heat, promoting diuresis, and detoxification. It is used for conditions such as fever and cold, dry cough due to heat, high fever and thirst, dysuria, edema, sore throat, swollen throat, mouth ulcers, and toothache due to wind-heat; externally, it is used for abscesses, carbuncles, burns, bruises, parotitis, herpes zoster, eczema, dermatitis, and snake bites.

功效作用 功能
Efficacy and Functions

清热，利尿，解毒。主治
Clearing heat, promoting diuresis, detoxifying. Mainly used for治疗(main treatment of)

用于感冒发热，燥热咳嗽，高热烦渴，淋痛，水肿，咽痛，喉肿，口疮，风火牙痛；外用于疮痈疔肿，烫火伤，跌打伤肿，腮腺炎，带状疱疹，湿疹，皮炎，毒蛇咬伤。用法用量
Used for fever and common cold, dry cough with heat, high fever with restlessness and thirst, painful urination, edema, sore throat, swollen throat, mouth ulcers, and toothache caused by excessive internal heat; externally used for abscesses, boils, burns, bruises, parotitis, herpes zoster, eczema, dermatitis, and snake bites. Dosage and administration.

10-60g。外用：鲜品适量，捣烂敷或烧灰调敷患处；或煎汤洗。临床应用 相关配伍
10-60g. External use: appropriate amount of fresh product, mashed and applied as a poultice or mixed with ash for application on the affected area; or decocted for washing. Clinical applications and relevant compatibility.

1、伤暑：鲜水龙30-60g，水煎服。（《广东中草药》）2、小儿麻疹初期发热：水龙、野菊花叶各30g，水煎服。（《北海民间常用中草药手册》）3、风火牙痛：鲜水龙60g，水煎服。（《广西常用中草药手册》）4、膏淋：鲜水龙60g，鲜野牡丹根45g，水煎服。（《福建药物志》）5、治带状疱疹：水龙15-30g，水煎服。外用鲜过塘蛇捣烂敷患处。（广州空军《常用中草药手册》）加工炮制 采收加工

1. Heatstroke: 30-60g of fresh Houttuynia cordata, decocted in water and taken orally. (From "Guangdong Herbal Medicine")2. Early stage of measles with fever in children: 30g each of Houttuynia cordata and wild chrysanthemum leaves, decocted in water and taken orally. (From "Common Folk Herbal Medicine Handbook of Beihai")3. Toothache due to wind-heat: 60g of fresh Houttuynia cordata, decocted in water and taken orally. (From "Commonly Used Herbal Medicine Handbook of Guangxi")4. Gonorrhea: 60g of fresh Houttuynia cordata, 45g of fresh wild peony root, decocted in water and taken orally. (From "Fujian Pharmacopoeia")5. Treatment for herpes zoster: 15-30g of Houttuynia cordata, decocted in water and taken orally. For external use, crush fresh Agkistrodon acutus and apply it to the affected area. (From "Common Herbal Medicine Handbook of Guangzhou Air Force") Processing and preparation: Harvesting and processing.

夏、秋季采收，洗净，鲜用或晒干。植物学信息 植物种属
Harvest in summer or autumn, wash and clean, use fresh or dry in the sun. Botanical information: Plant species.

柳叶菜科丁香蓼属植物水龙。形态特征
Water pepper is a plant of the Polygonaceae family in the genus Persicaria. It has distinctive morphological characteristics.

多年生浮水或上升草本，浮水茎节上常簇生圆柱状或纺锤状白色海绵状贮气的根状浮器，具多数须状根；浮水茎长可达3米，直立茎高达60厘米，无毛；生于旱生环境的枝上则常被柔毛但很少开花。叶倒卵形、椭圆形或倒卵状披针形，长3-6.5厘米，宽1.2-2.5厘米，先端常钝圆，有时近锐尖，基部狭楔形，侧脉6-12对；叶柄长3-15毫米；托叶卵形至心形，长1.5-2毫米，宽1.2-1.8毫米。花单生于上部叶腋；小苞片生于花柄上部，鳞片状长2-3毫米，宽1-2毫米；萼片5，三角形至三角状披针形，长6-12毫米，宽1.8-2.5毫米，先端渐狭，被短柔毛；花瓣乳白色，基部淡黄色，倒卵形，长8-14毫米，宽5-9毫米，先端圆形；雄蕊10，花丝白色，对花瓣的较短，长2-4毫米，对萼生的较长；花药卵状长圆形，长1.5-2毫米，花粉粒以单体授粉；花盘隆起，近花瓣处有蜜腺；花柱白色，长4-6毫米，下部被毛；柱头近球状，5裂，淡绿色，径1.5-2毫米，上部接受花粉；子房被毛，花梗长2.5-6.5厘米。蒴果淡褐色，圆柱状，具10条纵棱，长2-3厘米，径3-4毫米，果皮薄，不规则开裂；果梗长2.5-7厘米，被长柔毛或变无毛。种子在每室单列纵向排列，淡褐色，牢固地嵌入木质硬内果皮内，椭圆状，长1-1.3毫米。花期5-8月，果期8-11月。分布区域
Perennial floating or emergent herb, with cylindrical or spindle-shaped white spongy air-filled root floaters clustered on the nodes of the floating stem, with numerous root-like appendages; floating stems can grow up to 3 meters long, erect stems up to 60 centimeters tall, and are hairless; branches growing in dry environments are often hairy but rarely flower. Leaves are inverted ovate, elliptic, or inverted ovate-lanceolate, 3-6.5 centimeters long, 1.2-2.5 centimeters wide, bluntly rounded at the apex, sometimes nearly acute, with a narrow wedge-shaped base, 6-12 pairs of lateral veins; petioles are 3-15 millimeters long; stipules are ovate to cordate, 1.5-2 millimeters long, 1.2-1.8 millimeters wide. Flowers solitary in the upper leaf axils; bracts located on the upper part of the flower stalk, scale-like, 2-3 millimeters long, 1-2 millimeters wide; sepals 5, triangular to triangular-lanceolate, 6-12 millimeters long, 1.8-2.5 millimeters wide, gradually narrowing at the apex, covered with short hairs; petals milky white, pale yellow at the base, inverted ovate, 8-14 millimeters long, 5-9 millimeters wide, rounded at the apex; stamens 10, white filaments, shorter than the petals, 2-4 millimeters long, longer than the sepals, anthers oblong-elliptic, 1.5-2 millimeters long, pollen grains are monads; floral disc elevated, with nectaries near the petals; pistil white, 4-6 millimeters long, hairy at the base; stigma nearly globose, 5-lobed, pale green, 1.5-2 millimeters in diameter, pollen receptive at the upper part; ovary hairy, flower stalk 2.5-6.5 centimeters long. Capsule pale brown, cylindrical, with 10 longitudinal ridges, 2-3 centimeters long, 3-4 millimeters in diameter, thin pericarp, irregularly dehiscent; fruit stalk 2.5-7 centimeters long, covered with long hairs or becoming hairless. Seeds arranged singly in each locule, longitudinally, pale brown, firmly embedded in the woody hard inner pericarp, ellipsoidal, 1-1.3 millimeters long. Flowering period from May to August, fruiting period from August to November. Distribution area: [not provided].

分布于福建、江西、湖南南部、广东、香港、海南、广西、云南南部。生长环境
Distributed in southern Fujian, Jiangxi, southern Hunan, Guangdong, Hong Kong, Hainan, Guangxi, and southern Yunnan. Habitat.

生于水边或浅水池塘中。
Born by the water or in shallow ponds.