杜鹃花叶，中药名。为杜鹃花科植物杜鹃花RhododendronsimsiiPlanch.的叶。分布于长江流域以南各地，东至台湾，西到四川、云南。具有清热解毒，止血，化痰止咳之功效。常用于痈肿疮毒，荨麻疹，外伤出血，支气管炎。
Rhododendron l, name of Chinese Medicinal Material. ves. They are the leaves of Rhododendron simsii Planch., a plant of the Ericaceae family. It is distributed in various regions south of the Yangtze River, east to Taiwan, and west to Sichuan and Yunnan. It has the functions of clearing heat and detoxification, stopping bleeding, and resolving phlegm and relieving cough. It is often used for abscesses, ulcers, urticaria, external bleeding, and bronchitis.

功效作用 功能
Efficacy and Functions

清热解毒，止血，化痰止咳。主治
Clearing heat, detoxifying, stopping bleeding, resolving phlegm, and relieving cough. Mainly used for治疗。

痈肿疮毒，荨麻疹，外伤出血，支气管炎。用法用量
Boils, swelling, sores, and toxins, hives, external bleeding from injuries, bronchitis. Dosage and administration.

外用：适量，鲜品捣敷；或煎水洗。内服：煎汤，10-15g。注意事项
External use: Apply an appropriate amount of fresh herbs topically or use them as a decoction for washing. Internal use: Decoction, 10-15g. Please pay attention to the precautions.

《全国中草药汇编》：“孕妇忌服。”相关论述
"National Compilation of Chinese Herbal Medicine: 'Not suitable for pregnant women.' Relevant discussion."

1、《分类草药性》：“梗叶洗风火疮。”2、《浙江民间常用草药》：“消肿止血，应用（于）外伤出血。”3、《全国中草药汇编》：“清热解毒，化痰止咳，止痒。主治支气管炎，荨麻疹，外用治痈肿。”4、《贵州民间方药集》：“止喘。”5、《福建药物志》：“疏风行气，活血散瘀。主治荨麻疹，对口疮。”临床应用 临床应用

1. "Classified herbal properties: 'Stems and leaves clear wind-heat and treat sores.'"2. "Commonly used folk herbs in Zhejiang: 'Reduce swelling and stop bleeding, used for external bleeding injuries.'"3. "National Compilation of Chinese Herbal Medicines: 'Clear heat, detoxify, transform phlegm, stop coughing, and relieve itching. Mainly used for bronchitis, urticaria, and externally for treating abscesses and swellings.'"4. "Folk remedies from Guizhou: 'Relieve asthma.'"5. "Medical Records of Fujian: 'Dispel wind, promote qi circulation, activate blood, and disperse stasis. Mainly used for urticaria and oral ulcers.' Clinical application."

治疗慢性气管炎。相关配伍
Treatment for chronic bronchitis. Related herbal formula.

1、治指疔，各种阳性肿毒：新鲜杜鹃的枝头嫩叶适量，捣烂如泥，敷于患处，每日换药2次。（《江西民间草药验方》）2、治对口疮：（杜鹃）鲜叶和侧柏叶等量捣烂，调鸡蛋清或蜜，敷患处。（《福建中草药》）加工炮制 采收加工

1. To treat furuncles and various types of yang-positive swellings and toxins: Take a suitable amount of fresh azalea branches and tender leaves, mash them into a paste, and apply to the affected area. Change the dressing twice daily. (From "Jiangxi Folk Herbal Prescriptions")2. To treat oral ulcers: Mash an equal amount of fresh azalea leaves and cypress leaves, mix with egg white or honey, and apply to the affected area. (From "Fujian Chinese Herbal Medicine") Processing and preparation: Harvest and process.

春、秋季采收，鲜用或晒干。植物学信息 植物种属
Harvest in spring or autumn, use fresh or sun-dried. Botanical information: Plant species.

杜鹃花科植物杜鹃花。形态特征
Rhododendron, a plant in the Ericaceae family. Morphological characteristics.

落叶灌木，高2(-5)米；分枝多而纤细，密被亮棕褐色扁平糙伏毛。叶革质，常集生枝端，卵形、椭圆状卵形或倒卵形或倒卵形至倒披针形，长1.5-5厘米，宽0.5-3厘米，先端短渐尖，基部楔形或宽楔形，边缘微反卷，具细齿，上面深绿色，疏被糙伏毛，下面淡白色，密被褐色糙伏毛，中脉在上面凹陷，下面凸出；叶柄长2-6毫米，密被亮棕褐色扁平糙伏毛。花芽卵球形，鳞片外面中部以上被糙伏毛，边缘具睫毛。花2-3(-6)朵簇生枝顶；花梗长8毫米，密被亮棕褐色糙伏毛；花萼5深裂，裂片三角状长卵形，长5毫米，被糙伏毛，边缘具睫毛；花冠阔漏斗形，玫瑰色、鲜红色或暗红色，长3.5-4厘米，宽1.5-2厘米，裂片5，倒卵形，长2.5-3厘米，上部裂片具深红色斑点；雄蕊10，长约与花冠相等，花丝线状，中部以下被微柔毛；子房卵球形，10室，密被亮棕褐色糙伏毛，花柱伸出花冠外，无毛。蒴果卵球形，长达1厘米，密被糙伏毛；花萼宿存。花期4-5月，果期6-8月。分布区域
Deciduous shrub, 2 (-5) meters tall; branches are numerous and slender, densely covered with shiny brown flat rough hairs. The leaves are leathery, usually clustered at the end of branches, ovate, elliptic-ovate, inverted ovate, or inverted lanceolate, 1.5-5 cm long, 0.5-3 cm wide, with a short acuminate apex, cuneate or broadly cuneate base, slightly revolute margin, fine teeth, dark green upper surface sparsely covered with rough hairs, pale white lower surface densely covered with brown rough hairs, midvein concave on the upper surface, convex on the lower surface; petiole 2-6 mm long, densely covered with shiny brown flat rough hairs. Flower buds are ovoid, scales on the outside above the middle covered with rough hairs, and edges have eyelashes. Flowers 2-3 (-6) clustered at the top of branches; pedicels 8 mm long, densely covered with shiny brown rough hairs; calyx deeply 5-lobed, lobes triangular-ovate, 5 mm long, covered with rough hairs, edges with eyelashes; corolla wide funnel-shaped, rose, bright red, or dark red, 3.5-4 cm long, 1.5-2 cm wide, 5 lobes, inverted ovate, 2.5-3 cm long, upper lobes with deep red spots; stamens 10, about the same length as the corolla, filaments linear, slightly hairy below the middle; ovary ovoid, 10-loculed, densely covered with shiny brown rough hairs, style extends beyond the corolla, hairless. Capsule ovoid, up to 1 cm long, densely covered with rough hairs; persistent calyx. Flowering period is from April to May, fruiting period is from June to August. Distribution area.

分布于长江流域以南各地，东至台湾，西到四川、云南。生长环境
Distributed in various regions south of the Yangtze River Basin, east to Taiwan, west to Sichuan and Yunnan. Habitat.

生于丘陵山地或平地，疏灌丛中。
Born in hilly or flat areas, scattered among shrubs.