水曲柳，中药名。为木犀科植物水曲柳FraxinusmandschuricaRupr.的树皮。分布于东北、华北及陕西、甘肃，湖北。具有清热燥湿，清肝明目之功效。用于湿热泻痢，带下，肝热目赤，目生翳膜，牛皮癣。
Shui-qu-liu, name of Chinese Medicinal Material. Fraxinus mandshurica Rupr.) is the bark of the plant Fraxinus mandshurica Rupr. of the Oleaceae family. It is distributed in Northeast China, North China, Shaanxi, Gansu, and Hubei. It has the functions of clearing heat and drying dampness, and clearing liver and improving eyesight. It is used for damp-heat diarrhea, leukorrhea, liver heat with red eyes, corneal opacity, and psoriasis.

功效作用 功能
The efficacy and function.

清热燥湿，清肝明目。主治
Clearing heat and drying dampness, clearing the liver and improving vision. Used to treat...

用于湿热泻痢，带下，肝热目赤，目生翳膜，牛皮癣。用法用量
Used for damp-heat diarrhea, leukorrhea, liver heat with red eyes, corneal opacity, and psoriasis. Dosage and administration.

内服：煎汤，6-12g。外用：适量，煎水洗。药理作用
Internal use: Decoction, 6-12g. External use: Appropriate amount, decoct with water for washing. Pharmacological actions.

水曲柳乙醇提取物有明显的镇痛、抗炎、抗菌等作用。临床应用 临床应用
The ethanolic extract of Taxodium distichum (L.) Rich. has significant analgesic, anti-inflammatory, and antibacterial effects. It is used in clinical practice.

用于痢疾，月经不调，白带，慢性支气管炎，急性结膜炎，疟疾等疾病。加工炮制 采收加工
Used for dysentery, irregular menstruation, leukorrhea, chronic bronchitis, acute conjunctivitis, malaria and other diseases. Processing and preparation: collection and processing.

秋季整枝时，剥取树皮，切片，晒干。药材鉴别 药材性状
During the autumn pruning, peel the bark, slice it, and dry it in the sun. Identify the medicinal properties and characteristics of the herb.

树皮呈卷筒状或槽状，厚约2mm。外表面灰褐色，有浅裂纹及皮孔；内表面灰棕色，较平滑。质坚硬，断面纤维性。气微，味苦。植物学信息 植物种属
The bark is cylindrical or grooved, about 2mm thick. The outer surface is gray-brown with shallow cracks and pores; the inner surface is gray-brown and relatively smooth. It is hard in texture and fibrous in cross-section. It has a slight odor and a bitter taste. Botanical information: plant species.

木犀科植物水曲柳。形态特征
The plant belongs to the Oleaceae family and is called Water Fir. Here are its morphological characteristics.

水曲柳又名：东北梣。落叶大乔木，高达30米以上，胸径达2米；树皮厚，灰褐色，纵裂。冬芽大，圆锥形，黑褐色，芽鳞外侧平滑，无毛，在边缘和内侧被褐色曲柔毛。小枝粗壮，黄褐色至灰褐色，四棱形，节膨大，光滑无毛，散生圆形明显凸起的小皮孔；叶痕节状隆起，半圆形。羽状复叶长25-35（-40）厘米；叶柄长6-8厘米，近基部膨大，干后变黑褐色；叶轴上面具平坦的阔沟，沟棱有时呈窄翅状，小叶着生处具关节，节上簇生黄褐色曲柔毛或秃净；小叶7-11（-13）枚，纸质，长圆形至卵状长圆形，长5-20厘米，宽2-5厘米，先端渐尖或尾尖，基部楔形至钝圆，稍歪斜，叶缘具细锯齿，上面暗绿色，无毛或疏被白色硬毛，下面黄绿色，沿脉被黄色曲柔毛，至少在中脉基部簇生密集的曲柔毛，中脉在上面凹入，下面凸起，侧脉10-15对，细脉甚细，在下面明显网结；小叶近无柄。圆锥花序生于去年生枝上，先叶开放，长15-20里米；花序梗与分枝具窄翅状锐棱；雄花与两性花异株，均无花冠也无花萼；雄花序紧密，花梗细而短，长3-5毫米，雄蕊2枚，花药椭圆形，花丝甚短，开花时迅速伸长；两性花序稍松散，花梗细而长，两侧常着生2枚甚小的雄蕊，子房扁而宽，花柱短，柱头2裂。翅果大而扁，长圆形至倒卵状披针形，长3-3.5（-4）厘米，宽6-9毫米，中部最宽，先端钝圆、截形或微凹，翅下延至坚果基部，明显扭曲，脉棱凸起。花期4月，果期8-9月。分布区域
The water fir, also known as the Northeastern Aspen, is a deciduous tall tree that can grow over 30 meters in height with a diameter at breast height of up to 2 meters. The tree bark is thick, gray-brown, and longitudinally fissured. The winter buds are large, conical, and black-brown in color, with smooth outer bud scales and no hairs, but with brownish curved soft hairs on the edges and inner sides. The twigs are stout, yellow-brown to gray-brown, quadrangular, with swollen nodes, smooth and hairless, and scattered with prominent raised lenticels. The leaf scars are nodular, semi-circular. The pinnate compound leaves are 25-35 (-40) cm long, with petioles 6-8 cm long, swollen near the base, turning black-brown when dry. The leaf rachis has a flat wide groove on the upper surface, sometimes with narrow wing-like ridges, and joints at the base of leaflets with clusters of yellow-brown curved soft hairs or being glabrous. There are 7-11 (-13) leaflets, papery, oblong to ovate-oblong, 5-20 cm long, 2-5 cm wide, gradually tapering or acuminate at the apex, cuneate to obtuse at the base, slightly oblique, with finely serrate margins, dark green and hairless or sparsely covered with white stiff hairs on the upper surface, and yellow-green with yellow curved hairs along the veins on the lower surface, especially dense near the base of the midrib, which is concave on the upper surface and raised on the lower surface, with 10-15 pairs of secondary veins and distinct reticulate tertiary veins on the lower surface. The leaflets are nearly sessile. The cone-shaped inflorescences are borne on the previous year's branches, with male flowers opening first, and are 15-20 cm long. The inflorescence stalk and branches have narrow wing-like sharp edges. The male and bisexual flowers are on separate plants, both lacking corollas and sepals. The male flowers are densely arranged, with slender and short flower stalks, 3-5 mm long, 2 stamens, elliptic anthers, and very short filaments that rapidly elongate during flowering. The bisexual flowers are slightly loose, with slender and long flower stalks, often with 2 very small stamens on each side, a flattened and wide ovary, a short style, and a 2-lobed stigma. The winged fruits are large and flattened, oblong to obovate-lanceolate, 3-3.5 (-4) cm long, 6-9 mm wide, widest in the middle, with a bluntly rounded, truncate, or slightly concave apex, and twisted wings extending to the base of the nut, with prominent veins. The flowering period is in April, and the fruiting period is in August to September. Distribution area: [not provided]

分布于东北、华北及陕西、甘肃、湖北。生长环境
Distributed in Northeast China, North China, Shaanxi, Gansu, and Hubei. Growing environment.

生于山坡疏林或河谷平缓处。
Born on the slopes of mountains with sparse forests or in gentle river valleys.