榆皮涎，中药名。为榆科植物榆树UlmuspumilaL.茎皮部的涎汁。分布于东北、华北、西北、华东、中南、西南及西藏等地，长江以南多系栽培。具有杀虫之功效。常用于疥癣。
Yu-pi-xian, name of Chinese Medicinal Material. It is the exudate from the stem bark of the elm tree (Ulmus pumila L.), a plant of the family Ulmaceae. It is distributed in Northeast China, North China, Northwest China, East China, Central South China, Southwest China, and Tibet, and is mostly cultivated south of the Yangtze River. It has insecticidal effects and is commonly used for scabies.

功效作用 功能
Efficacy and Functions

杀虫。主治
Insecticidal. Mainly used for treating.

疥癣。用法用量
Scabies. Dosage and administration.

外用：适量，涂敷。相关论述
External use: Apply an appropriate amount and spread evenly. Further discussion.

1、《日华子》：“涎敷癣。”2、《本草蒙筌》：“敷癣，杀虫立瘥。”加工炮制 采收加工

1. "Ri Hua Zi": "Apply saliva to treat ringworm."2. "Ben Cao Meng Quan": "Applying saliva to treat ringworm, kills parasites and promotes healing." Processing and preparation: collection and processing.

四季可采，割破茎皮，收集流出的涎汁。植物学信息 植物种属
Harvest in all seasons by cutting the stem bark and collecting the exuded sap. Botanical information: plant species.

榆科植物榆树。形态特征
Elm tree, a plant in the Ulmaceae family. Morphological characteristics.

榆树，又名枌、白榆、白枌、零榆、枌榆、榆钱树、家榆、春榆、粘榔树、钻天榆、钱榆。落叶乔木，高达25米，胸径1米，在干瘠之地长成灌木状；幼树树皮平滑，灰褐色或浅灰色，大树之皮暗灰色，不规则深纵裂，粗糙；小枝无毛或有毛，淡黄灰色、淡褐灰色或灰色，稀淡褐黄色或黄色，有散生皮孔，无膨大的木栓层及凸起的木栓翅；冬芽近球形或卵圆形，芽鳞背面无毛，内层芽鳞的边缘具白色长柔毛。叶椭圆状卵形、长卵形、椭圆状披针形或卵状披针形，长2-8厘米，宽1.2-3.5厘米，先端渐尖或长渐尖，基部偏斜或近对称，一侧楔形至圆，另一侧圆至半心脏形，叶面平滑无毛，叶背幼时有短柔毛，后变无毛或部分脉腋有簇生毛，边缘具重锯齿或单锯齿，侧脉每边9-16条，叶柄长4-10毫米，通常仅上面有短柔毛。花先叶开放，在去年生枝的叶腋成簇生状。翅果近圆形，稀倒卵状圆形，长1.2-2厘米，除顶端缺口柱头面被毛外，余处无毛，果核部分位于翅果的中部，上端不接近或接近缺口，成熟前后其色与果翅相同，初淡绿色，后白黄色，宿存花被无毛，4浅裂，裂片边缘有毛，果梗较花被为短，长1-2毫米，被（或稀无）短柔毛。花果期3-6月（东北较晚）。分布区域
Elm, also known as Ulmus, white elm, white Ulmus, zero elm, Ulmus, Ulmus tree, home elm, spring elm, sticky elm, sky-reaching elm, money elm. It is a deciduous tree that can grow up to 25 meters tall with a diameter of 1 meter. In barren areas, it grows into a shrub-like form. The bark of young trees is smooth, gray-brown or light gray, while the bark of mature trees is dark gray, irregularly deeply fissured, and rough. The small branches are either hairless or hairy, pale yellow-gray, light brown-gray, or gray, sparsely light brown-yellow or yellow, with scattered pores but no swollen cork layer or raised cork wings. The winter buds are nearly spherical or ovate, with the back of the bud scales being hairless and the edges of the inner bud scales having long white soft hairs. The leaves are elliptic-ovate, lanceolate, elliptic-lanceolate, or ovate-lanceolate, 2-8 cm long and 1.2-3.5 cm wide, gradually pointed or long-pointed at the tip, oblique or nearly symmetrical at the base, wedge-shaped to round on one side, and round to semi-heart-shaped on the other side. The leaf surface is smooth and hairless, with short soft hairs when young on the leaf back, later becoming hairless or with clusters of hairs at the vein axils, and the edges have heavy serrations or single serrations. There are 9-16 veins on each side, and the leaf stalk is 4-10 mm long, usually with short soft hairs only on the upper side. The flowers bloom before the leaves, clustered in the leaf axils of last year's branches. The winged fruit is nearly circular, rarely ovoid-circular, 1.2-2 cm long, with the top end of the notch covered in hair, and the rest hairless. The fruit kernel is partially located in the middle of the winged fruit, not close to or close to the notch at the top, and its color before and after ripening is the same as the fruit wing, initially light green, later white-yellow. The persistent floral cover is hairless, with 4 shallow lobes, and the edges of the lobes are hairy. The fruit stalk is shorter than the floral cover, 1-2 mm long, with short soft hairs (or rarely none). The flowering and fruiting period is from March to June (later in the northeast). Distribution area: [missing information].

分布于东北、华北、西北、华东、中南、西南及西藏等地，长江以南多系栽培。生长环境
Distributed in Northeast China, North China, Northwest China, East China, Central South China, Southwest China, and Tibet, mainly cultivated south of the Yangtze River. Growing environment.

生于河堤、田埂和路边，山麓、沙地上亦有生长。
Born on riverbanks, field ridges, and roadsides, they also grow at the foot of mountains and on sandy land.