红梗草，中药名。为菊科泽兰属植物异叶泽兰Eupatorium heterophyllum DC.[E.wallichii DC.var.heterophyllum（DC.）Diels]的全草。具有活血调经，祛瘀止痛，除湿行水的功效。主治月经不调，经闭，癥瘕，腹痛，产后恶露不行，水肿，跌打损伤，骨折，痈疽疮毒。
Hong-geng-cao, name of Chinese Medicinal Material. the whole plant of Eupatorium heterophyllum DC. [E.wallichii DC.var.heterophyllum (DC.) Diels], a plant of the Asteraceae family. It has the functions of promoting blood circulation and regulating menstruation, dispelling blood stasis and relieving pain, and eliminating dampness and promoting diuresis. It is mainly used for irregular menstruation, amenorrhea, abdominal masses, abdominal pain, postpartum lochia retention, edema, bruises, fractures, and carbuncles.

功效作用 功能
The efficacy and functions.

活血调经，祛瘀止痛，除湿行水。主治
Promoting blood circulation, regulating menstruation, removing blood stasis, alleviating pain, dispelling dampness, and promoting urination. Mainly used for the treatment of...

月经不调，经闭，癥瘕，腹痛，产后恶露不行，水肿，跌打损伤，骨折，痈疽疮毒。用法用量
Menstrual irregularities, amenorrhea, abdominal masses, abdominal pain, postpartum lochia retention, edema, bruises, fractures, and carbuncles and ulcers. Dosage and administration.

内服，9-15g。外用：适量，捣敷。加工炮制 采收加工
Internal use: 9-15g. External use: appropriate amount, pounded for application. Processing: harvested and processed.

6-10月采收，鲜用或晒干。药材鉴别 药材性状
Harvest from June to October, for fresh use or drying. Identification of medicinal materials and their properties.

茎圆柱形，直径2-7mm，下部木千周，灰棕色，上部嫩茎灰淡绿色，被白色短毛；质脆，易断。叶多皱缩破碎，完整展平后呈椭圆形或披针形，边缘有圆锯齿，暗绿色或灰绿色，两面有黄色腺点有短白毛。微臭，味稍苦。显微鉴别叶表面观：上表皮细胞类多角形，垂周壁较平直；腺毛较多，头状由4个细胞组在，直径40-44μm；非腺毛有2种，一种由3-7人细胞组成，长132-260μm基部直径32-40μm；另一种由2-4人细胞组成，中间1或2个细胞常呈缢缩状，长100-140μm，基部直径14-16μm，常有淡棕以内含物；气孔为不定式。下表皮细胞垂周壁波状弯曲，腺毛、非腺毛与上表面相惟，叶脉上非腺毛很多。植物学信息 植物种属
The stem is cylindrical, with a diameter of 2-7mm. The lower part is woody, gray-brown, and the upper part of the stem is light gray-green, covered with white short hairs. The texture is brittle and easily breaks. The leaves are wrinkled and broken, and when fully expanded, they are elliptical or lanceolate, with rounded serrations on the edges. They are dark green or grayish-green, with yellow glandular spots and short white hairs on both sides. They have a slight odor and a slightly bitter taste. Microscopic examination of the leaf surface shows that the upper epidermal cells are mostly polygonal, with relatively straight periclinal walls. There are numerous glandular hairs, each with a head composed of 4 cells and a diameter of 40-44μm. There are two types of non-glandular hairs, one composed of 3-7 cells, with a length of 132-260μm and a base diameter of 32-40μm, and the other composed of 2-4 cells, with 1 or 2 cells often constricted in the middle, a length of 100-140μm, and a base diameter of 14-16μm, often containing light brown contents. The stomata are of the anisocytic type. The lower epidermal cells have wavy periclinal walls, and the glandular and non-glandular hairs are similar to those on the upper surface. There are many non-glandular hairs on the leaf veins. This plant species belongs to the field of botany.

菊科泽兰属植物异叶泽兰。形态特征
The plant belongs to the Asteraceae family and is called Heteropappus. Its morphological characteristics include...

多年生草本，高1-2m。茎直立，圆柱形，被长毛，上部有散生的细红色斑纹，基部淡褐色或紫色。叶对生，有时上部叶互生；叶片3全裂，少有浅裂或半裂，但花序下的叶不裂，裂片长椭圆形、椭圆状披针形或披针形，两面被柔毛及腺点，但上面的毛少而稀呈绿色，下面灰白色毛密而呈淡白色，边缘有粗锯齿，具短柄；中裂片较大，长4-9cm，宽1.5-3.5cm，侧生裂片较短上，叶柄较短，长约1cm；花序下的叶更小，不裂，卵形或披针形，无柄或有短柄。头状花序在茎顶或分枝顶端排成伞房或复伞房花序；总苞片先端圆钝。瘦果有腺点；冠毛与花冠等长。花期7-9月，果期9-10月。分布区域
Perennial herb, 1-2m tall. The stem is erect, cylindrical, and covered with long hairs, with scattered fine red spots on the upper part and pale brown or purple at the base. The leaves are opposite, sometimes with alternate upper leaves; leaf blades are 3-lobed, occasionally shallowly or partially lobed, but the leaves below the inflorescence are not lobed. The lobes are long elliptic, elliptic-lanceolate, or lanceolate, with soft hairs and glandular dots on both surfaces. The upper surface has sparse green hairs, while the lower surface has dense pale hairs, with coarse serrations on the edges and short petioles. The central lobe is larger, 4-9cm long and 1.5-3.5cm wide, with shorter lateral lobes and a short petiole about 1cm long. The leaves below the inflorescence are smaller, unlobed, ovate or lanceolate, and either sessile or with short petioles. The capitulum inflorescence is arranged in umbels or compound umbels at the top of the stem or branch. The bracts have rounded tips. The achene has glandular dots, and the pappus is as long as the corolla. It flowers from July to September and fruits from September to October. Distributed in [specific region].

分布于四川、贵州、云南及西藏等地。生长环境
Distributed in Sichuan, Guizhou, Yunnan, and Tibet, among other regions. Habitat.

生于山坡地灌木林缘或林下，以及山坡草丛中。
Born on the slopes of shrubbery or under the forest canopy, as well as in the grassy slopes.