狗尾草子，中药名。为禾本科狗尾草属植物狗尾草Setaria viridis（L.）Beauv.的种子。具有解毒，止泻，截疟的功效。主治缠腰火丹，泄泻，疟疾。
Gou-wei-cao-zi, name of Chinese Medicinal Material. Seed of Gou-wei-cao) refers to the seeds of Setaria viridis (L.) Beauv., a plant belonging to the Poaceae family. It is known for its detoxifying, antidiarrheal, and antimalarial effects, and is commonly used to treat lumbar carbuncle, diarrhea, and malaria.

功效作用 功能
The efficacy and functions.

解毒，止泻，截疟。主治
Detoxification, antidiarrheal, and antimalarial. Mainly used for治疗.

缠腰火丹，泄泻，疟疾。用法用量
The herbal medicine "Chan Yao Huo Dan" is used for treating diarrhea and malaria. Can you please provide the dosage and administration method?

内服：煎汤，9-15g；或研末冲。外用：适量，炒焦，研末调敷。加工炮制 采收加工
Internal use: Decoction, 9-15g; or powdered for infusion. External use: appropriate amount, stir-fry until charred, grind into powder for application. Processing and preparation: harvesting and processing.

秋季采收成熟果穗，搓下种子，去净杂质，晒干。植物学信息 植物种属
In autumn, harvest the mature fruit spikes, rub off the seeds, remove impurities, and dry them in the sun. Botanical information: plant species.

禾本科狗尾草属植物狗尾草。形态特征
The plant in the Poaceae family is known as dogtail grass. It has the following morphological characteristics:

狗尾草，一年生草本。秆直立或基部膝曲，高10-100cm，基部径达3-7mm。叶鞘松驰，边缘具较径的密绵毛状纤毛；叶舌极短，边缘有纤毛；叶片扁平，长三角状狭披针形或线状披针形，先端长渐尖，基部钝圆形，几成栽状或渐窄，长4-30cm，宽2-18mm，通常无毛或疏具疣毛，边缘粗糙。圆锥花序紧密呈圆柱状或基部稍疏离，直方或稍弯垂，主轴被较长柔毛，长2-15cm，宽4-13mm（除刚毛外），刚毛长4-12mm，粗糙，直或稍扭曲，通常绿色或褐黄到紫红或紫色；小穗2-5个簇生于主轴上或更多的小穗着生在短小枝上，椭圆形，先端钝，长2-2.5mm，铅绿色；第1颖卵形，长约为小穗的1/3，具3脉，第2颖几与小穗等长，椭圆形，具5-7脉；第1外稃与小穗等长，具5-7脉，先端钝，其内稃短小狭窄，第2外稃椭圆形，具细点状皱纹，边缘内卷，狭窄；鳞被楔形，先端微凹；花柱基分离。颖果灰白色。花、果期5-10月。分布区域
Dogtail grass is an annual herbaceous plant. The stem is erect or bent at the base, 10-100cm tall, and 3-7mm in diameter at the base. The leaf sheath is loose, with relatively dense and woolly hairs on the edge; the leaf tongue is very short with fringes on the edge; the leaf blade is flat, long triangular-narrow lanceolate or linear lanceolate, gradually pointed at the apex, and bluntly rounded at the base, becoming somewhat planted or gradually narrow, 4-30cm long, 2-18mm wide, usually hairless or sparsely warty, with rough edges. The cone-shaped inflorescence is densely cylindrical or slightly loose at the base, rectangular or slightly drooping, with a longer soft hair on the main axis, 2-15cm long, 4-13mm wide (except for the stiff hairs), stiff hairs 4-12mm long, rough, straight or slightly twisted, usually green or brownish-yellow to purple-red or purple; 2-5 spikelets clustered on the main axis or more spikelets borne on short branches, elliptical, blunt at the apex, 2-2.5mm long, lead green; the first glume is ovate, about 1/3 the length of the spikelet, with 3 veins, the second glume is almost as long as the spikelet, elliptical, with 5-7 veins; the first lemma is as long as the spikelet, with 5-7 veins, blunt at the apex, the first palea is short, narrow, and the second palea is elliptical, with fine wrinkling, inwardly rolled at the edge, narrow; the scale is wedge-shaped, slightly concave at the apex; the style base is separated. The glume is grayish-white. The flowering and fruiting period is from May to October. Distribution area.

分布于全国各地。生长环境
Distributed throughout the country. Growing environment.

生于荒野、道旁。
Born in the wilderness, by the side of the road.