知风草，中药名。为禾本科画眉草属植物知风草Eragrostisferruginea（Thunb.）Beauv.的根。植物知风草，分布几遍全国。具有舒筋散瘀之功效。主治跌打内伤，筋骨疼痛。
Zhi-feng-cao, name of Chinese Medicinal Material. The root of Eragrostis ferruginea (Thunb.) Beauv., a plant belonging to the Poaceae family. Zhi-feng-cao is widely distributed throughout the country. It has the functions of relaxing tendons and dispersing stasis, and is mainly used to treat injuries from falls, internal injuries, and pain in the tendons and bones.

功效作用 功能
The efficacy and functions.

舒筋散瘀。主治
Relax tendons, activate blood circulation, and relieve pain. Used to treat

跌打内伤，筋骨疼痛。用法用量
Traumatic injury and internal damage, with pain in the muscles and bones. Dosage and administration.

内服：煎汤，6-9g。外用：适量，捣敷。相关论述
Internal use: Decoction, 6-9g. External use: Appropriate amount, pounded for application. Relevant discussion.

《贵州民间药物》：“舒筋逐瘀。”临床应用 相关配伍
"Relaxing tendons and dispelling stasis." Clinical application and related compatibility in traditional Guizhou folk medicine.

治跌打损伤，知风草6g，大血藤15g，骚羊古9g。煎水兑酒服。（《贵州民间药物》）加工炮制 采收加工
For treating bruises and injuries, take 6g of Zhi Feng Cao, 15g of Da Xue Teng, and 9g of Sao Yang Gu. Decoct the herbs in water and mix with alcohol for consumption. (From "Guizhou Folk Medicine") The processing and preparation involve harvesting and processing the herbs.

8月采挖，除去地上部分，洗净，晒干或鲜用。植物学信息 植物种属
In August, the plant is harvested by digging, removing the aboveground parts, washing them clean, and then drying them in the sun, or using them fresh. Botanical information: plant species.

禾本科画眉草属植物知风草。形态特征
The plant in the family Poaceae is known as the Chinese name "知风草". Its morphological characteristics include...

多年生草本。秆丛生或单生，直立或基部膝曲，高30-110厘米，粗壮，径约4毫米。叶鞘两侧极压扁，鞘口有毛，脉上有腺体；叶舌退化成1圈短毛；叶片扁平或内卷，较坚韧，背面光滑，表面粗糙，或近基部疏具长柔毛，长20-40厘米，宽3-6毫米。圆锥花序，开展，长20-30厘米，分枝单生，或2-3个聚生，枝腋间无毛；小穗柄有腺体；小穗长圆形，长5-10毫米，有7-12朵小花，紫色和紫黑色；颖披针形，有1脉，先端锐尖至渐尖；外稃卵状披针形，先端稍钝，侧脉明显而突出，第1外稃长约3毫米，内稃短于外稃，脊上具有小纤毛，宿存；花药长约1毫米。颖果棕红色，长约1.5毫米。花、果期8-12月。生长环境
Perennial herb. Stems are tufted or solitary, erect or geniculate at the base, 30-110 cm tall, stout, and about 4 mm in diameter. Leaf sheaths are strongly compressed on both sides, with hairs at the mouth of the sheath and glands on the veins; leaf ligules degenerate into a ring of short hairs; leaf blades are flat or involute, relatively tough, smooth on the back, rough on the surface, or sparsely long-hairy near the base, 20-40 cm long and 3-6 mm wide. The inflorescence is a cylindrical spike, open, 20-30 cm long, with solitary branches or 2-3 clustered branches, without hairs in the axils of the branches; the pedicels of the spikelets have glands; the spikelets are oblong, 5-10 mm long, with 7-12 small flowers, purple and purplish-black; the glumes are lanceolate, with one vein, sharply pointed to gradually pointed at the apex; the lemma is ovate-lanceolate, slightly blunt at the apex, with prominent and protruding veins, the first lemma is about 3 mm long, the palea is shorter than the lemma, with small hairs on the ridge, persistent; anthers are about 1 mm long. The fruit is reddish-brown, about 1.5 mm long. Flowering and fruiting occur from August to December. Habitat.

生于路边、山坡草地。
Born by the roadside, on the hillside grassland.