大种半边莲，中药名。为桔梗科植物江南山梗菜LobeliadavidiiFranch.的根或全草。分布于西南及安徽、浙江、江西、福建、湖北、湖南、广东、广西等地。具有宣肺化痰，清热解毒，利尿消肿之功效。常用于咳嗽痰多，水肿，痈肿疮毒，下肢溃烂，蛇虫咬伤。
Da-zhong-ban-bian-lian, name of Chinese Medicinal Material. It refers to the root or the whole plant of Lobelia davidii Franch., a plant of the Campanulaceae family, distributed in the southwest, as well as in Anhui, Zhejiang, Jiangxi, Fujian, Hubei, Hunan, Guangdong, and Guangxi. It has the functions of relieving cough and reducing phlegm, clearing heat and detoxifying, promoting diuresis and reducing swelling. It is often used for cough with excessive phlegm, edema, abscesses, ulcers on the lower limbs, and snake or insect bites.

功效作用 功能
Efficacy and Functions

宣肺化痰，清热解毒，利尿消肿。主治
Moistening the lungs to resolve phlegm, clearing heat and detoxifying, promoting diuresis to reduce swelling. Mainly used to treat...

用于咳嗽痰多，水肿，痈肿疮毒，下肢溃烂，蛇虫咬伤。用法用量
Indications: Used for cough with excessive phlegm, edema, boils and carbuncles, ulcers on lower limbs, and snake or insect bites. Dosage and Administration: [Please provide specific dosage and administration instructions.]

内服：煎汤，3-9g。外用：鲜品适量，捣敷。相关论述
Internal use: Decoction, 3-9g. External use: Fresh herb, appropriate amount, mashed for application. Relevant discussion.

1、《江西草药》：“解毒，止痛。”2、《湖南药物志》：“清热解毒，利尿消肿。治疗肝硬化腹水，水肿，疮疖肿毒，毒蛇咬伤。”临床应用 相关配伍

1. "Jiangxi Herbal Medicine": "Detoxification, pain relief."2. "Hunan Materia Medica": "Clears heat, detoxifies, diuretic, reduces swelling. Used to treat ascites in liver cirrhosis, edema, abscesses, swellings, and snake bites." Clinical applications and related combinations.

1、治痈肿疔毒：山梗菜根（鲜）适量，白糖、熟盐少许。捣烂外敷。（《江西草药》）2、治下肢溃烂：山梗菜500-1000g。煎水，外洗患处。（《湖北中草药志》）加工炮制 采收加工

1. Treatment of abscesses and swellings: Fresh shepherd's purse roots, appropriate amount; a little white sugar and salt. Mash and apply externally. (From "Jiangxi Herbal Medicine")2. Treatment of lower limb ulcers: 500-1000g of shepherd's purse. Decoct in water and use for external washing of the affected area. (From "Hubei Herbal Medicine Records") Processing and preparation: Harvest and process.

夏、秋季采收，洗净，鲜用或晒干。植物学信息 植物种属
Harvest in summer or autumn, wash and clean, use fresh or sun-dry. Botanical information: Plant species.

桔梗科植物江南山梗菜。形态特征
The Platycodon grandiflorus, a plant in the Campanulaceae family, is commonly known as the Chinese bellflower or balloon flower. It is native to East Asia and is known for its beautiful blue-violet flowers.

江南山梗菜：又名山梗草。多年生草本，高可达180cm。茎直立，无毛或具极短的倒生糙毛。叶互生；叶柄长达4cm，两边有翅；叶片螺旋状排列，下部的早落；卵状椭圆形至卵状披针形，长可达17cm，宽达7cm，先端渐尖，基部渐狭成柄，边缘具不规则的重锯齿或波状而具细齿。总状花序顶生，长20-50cm，花序轴无毛或具极短的柔毛；苞片卵状披针形，比花长；花萼筒倒卵状，长约4mm，基部浑圆，被极短的柔毛，裂片条状披针形，长8-12mm，边缘有小齿；花冠紫红色或红紫色，长1.8-2.5(-2.8)cm，近二唇形，上唇裂片条形，下唇裂片长椭圆形或披针状椭圆形，中肋明显，无毛或生微毛，喉部以下生柔毛；雄蕊在基部以上连合成筒。蒴果球状，直径6-10mm，底部常背向花序轴，无毛或有微毛。种子黄褐色，稍压扁，椭圆状。花、果期8-10月。分布区域
Jiangnan Shan Geng Cai: also known as Shan Geng Cao. It is a perennial herbaceous plant that can grow up to 180cm tall. The stem is erect, glabrous or with very short appressed rough hairs. The leaves are opposite; leaf stalks can be up to 4cm long, with wings on both sides; leaf blades are arranged spirally, with the lower ones falling off early; ovate elliptic to ovate lanceolate, up to 17cm long and 7cm wide, gradually pointed at the apex, gradually narrowing into a petiole at the base, with irregularly serrated or wavy margins with fine teeth. The cymose inflorescence is terminal, 20-50cm long, with the inflorescence axis glabrous or with very short soft hairs; bracts ovate lanceolate, longer than the flowers; calyx tube inverted ovate, about 4mm long, rounded at the base, covered with very short soft hairs, lobes linear lanceolate, 8-12mm long, with small teeth on the edges; corolla purple-red or red-purple, 1.8-2.5(-2.8)cm long, nearly bilabiate, upper lip lobes linear, lower lip lobes long elliptic or lanceolate elliptic, midrib obvious, glabrous or slightly hairy, soft hairs below the throat; stamens connate into a tube above the base. Capsule globose, 6-10mm in diameter, often facing away from the inflorescence axis at the base, glabrous or slightly hairy. Seeds are yellow-brown, slightly compressed, elliptical. Flowering and fruiting period is from August to October. Distribution area.

分布于西南及安徽、浙江、江西、福建、湖北、湖南、广东、广西等地。生长环境
Distributed in the southwest, as well as Anhui, Zhejiang, Jiangxi, Fujian, Hubei, Hunan, Guangdong, Guangxi, and other regions. Growing environment.

生于海拔2300m以下的山地林边或沟边较阴湿处。
It grows in shady and damp areas at the edge of mountain forests or ravines below an altitude of 2300 meters.