西桦，中药名。为桦木科植物西桦BetulaalnoidesBuch.-Ham.exD.Don的叶或树皮。分布于广东、海南、云南等地。具有解毒，敛疮之功效。用于疮毒，溃后久不收口。
Xi-hua, name of Chinese Medicinal Material. the leaves or bark of the Betula alnoides Buch.-Ham.ex D.Don, a plant of the Betulaceae family. It is distributed in Guangdong, Hainan, Yunnan, and other places. It has the functions of detoxification and wound healing, and is used for treating festering wounds that do not heal for a long time.

功效作用 功能
The efficacy and functions.

解毒，敛疮。主治
Detoxification and wound healing. Mainly used for治疗。

用于疮毒，溃后久不收口。用法用量
For ulcerous infections that do not heal for a long time, what is the dosage and usage?

外用：适量，鲜品捣敷。相关论述
External use: Apply an appropriate amount of fresh herbs and apply them by pounding. Relevant discussions.

《全国中草药汇编》：“主治疖毒，已出脓久不收口。”加工炮制 采收加工
"National Compilation of Chinese Herbal Medicines": "Mainly used for treating carbuncles and sores that have been suppurating for a long time without healing." Processing method: collection and processing after harvesting.

叶，春、夏、秋季采；树皮，全年均可剥采。鲜用或晒干。植物学信息 植物种属
Leaves should be harvested in spring, summer, and autumn; while the bark can be harvested throughout the year. It can be used fresh or dried. Botanical information: plant species.

桦木科植物西桦。形态特征
Birch is a plant of the Betulaceae family. Its morphological characteristics include...

西桦又名：西南桦木、蒙自桦、化桃木。乔木，高达16米；树皮红褐色；枝条暗紫褐色，有条棱，无毛；小枝密被白色长柔毛和树脂腺体。叶厚纸质，披针形或卵状披针形，长4-12厘米，宽2.5-5.5厘米，顶端渐尖至尾状渐尖，基部楔形、宽楔形或圆形，少有微心形，边缘具内弯的刺毛状的不规则重锯齿，上面无毛，下面的脉上疏被长柔毛，脉腋间具密髯毛，其余无毛，密生腺点；侧脉10-13对；叶柄长1.5-3(-4)厘米，密被长柔毛及腺点。果序长圆柱形，(2-)3-5枚排成总状，长5-10厘米，直径4-6毫米；总梗长5-10毫米，序梗长2-3毫米，均密被黄色长柔毛；果苞甚小，长约3毫米，背面密被短柔毛，边缘具纤毛，基部楔形，上部具3枚裂片，侧裂不甚发育，呈耳突状，中裂片矩圆形，顶端钝。小坚果倒卵形，长1.5-2毫米，背面疏被短柔毛，膜质翅大部分露于果苞之外，宽为果的两倍。分布区域
Birch, also known as Southwest Birch, Mengzi Birch, and Huatao Wood, is a tall tree that can grow up to 16 meters high. Its bark is reddish-brown, and its branches are dark purplish-brown with edges but no hair. The small branches are densely covered with white long soft hairs and resin glands. The leaves are thick and papery, lanceolate or ovate-lanceolate, 4-12 cm long and 2.5-5.5 cm wide, gradually tapering to a pointed or tail-like tip at the top, and with a wedge-shaped, wide-wedge-shaped, or round base, occasionally slightly cordate. The margins have irregularly serrated prickly hairs that curve inward, and the upper surface is hairless while the lower surface is sparsely covered with long soft hairs on the veins, with dense tufts of hair in the vein axils and numerous glands. There are 10-13 pairs of lateral veins, and the leaf stalk is 1.5-3(-4) cm long, densely covered with long soft hairs and glands. The fruit is arranged in a long cylindrical shape, with (2-)3-5 fruits in a raceme, 5-10 cm long and 4-6 mm in diameter. The peduncle is 5-10 mm long, and the pedicel is 2-3 mm long, both densely covered with yellow long soft hairs. The fruit bract is very small, about 3 mm long, densely covered with short soft hairs on the back, with fringed edges, a wedge-shaped base, and three lobes at the top, with the lateral lobes not well developed and appearing ear-like, while the middle lobe is rectangular with a blunt tip. The small nut is inverted-ovate, 1.5-2 mm long, sparsely covered with short soft hairs on the back, and the membranous wing mostly protrudes from the fruit bract, being twice as wide as the fruit. Distribution area.

分布于广东、海南、云南等地。生长环境
Distributed in Guangdong, Hainan, Yunnan, and other regions. Growing environment.

生于海拔700-2100m的山坡杂木林中。
Born in the mixed deciduous forests on slopes at an altitude of 700-2100 meters.