岩凤尾蕨，中药名。为凤尾蕨科植物岩凤尾蕨PterisdeltodonBak.的全草。分布于西南及台湾、广东、广西等地。具有清热利湿，敛肺止咳，定惊，解毒之功效。常用于泄泻，痢疾，淋证，久咳不止，小儿惊风，疮疖，蛇虫咬伤。
Yan-feng-wei-jue, name of Chinese Medicinal Material. Pteris deltodon Bak.) is the whole plant of the fern species Pteris deltodon Bak. in the family Pteridaceae. It is distributed in the southwest, Taiwan, Guangdong, Guangxi, and other regions. It has the functions of clearing heat and dampness, suppressing cough and relieving asthma, calming the mind, and detoxification. It is commonly used for diarrhea, dysentery, gonorrhea, persistent cough, infantile convulsions, sores, abscesses, and snake or insect bites.

功效作用 功能
Efficacy and Functions

清热利湿，敛肺止咳，定惊，解毒。主治
Clearing heat and dampness, consolidating the lungs to stop coughing, calming the mind, and detoxifying. Used to treat...

泄泻，痢疾，淋证，久咳不止，小儿惊风，疮疖，蛇虫咬伤。用法用量
Diarrhea, dysentery, gonorrhea, persistent cough, infantile convulsions, sores and abscesses, snake and insect bites. Dosage and administration.

内服：煎汤，9-15g。相关论述
Internal administration: Decoction, 9-15g. Relevant discussion.

《湖南药物志》：“清肺胃热，止泻消炎。治腹泻，久咳不止。”临床应用 相关配伍
"Hunan Materia Medica": "Clears lung and stomach heat, stops diarrhea and reduces inflammation. Used to treat diarrhea and persistent cough." Clinical application and relevant compatibility.

1、治腹泻：①岩凤尾蕨9g，木通6g，车前草6g。水煎服。②岩凤尾蕨9g，地胡椒6g。水煎服。每日服3次。（《湖南药物志》）2、治久咳不止：岩凤尾蕨9g，木心花9g，水灯草6g，樟木9g，桑白皮6g，枇杷树皮9g。水煎服。（《湖南药物志》）加工炮制 采收加工

1. Treatment for diarrhea: ① 9g of Davallia mariesii, 6g of Akebia quinata, and 6g of Plantago asiatica. Decoction for oral administration. ② 9g of Davallia mariesii and 6g of Piper kadsura. Decoction for oral administration. Take three times daily. (From "Hunan Materia Medica") 2. Treatment for persistent cough: 9g of Davallia mariesii, 9g of Flos magnoilae, 6g of Houttuynia cordata, 9g of Camphor tree, 6g of Morus alba bark, and 9g of Loquat tree bark. Decoction for oral administration. (From "Hunan Materia Medica") Processing and preparation: Harvest and process.

全年均可采收，鲜用或晒干。植物学信息 植物种属
Harvesting can be done throughout the year, and the herbs can be used fresh or dried. Botanical information: Plant species.

凤尾蕨科植物岩凤尾蕨。形态特征
Family Davalliaceae, plant Davallia. Morphological characteristics.

植株高15-25厘米。根状茎短而直立，粗约1厘米，先端被黑褐色鳞片。叶簇生，一型；叶柄长10-20厘米，粗1-2毫米，基部褐色，向上为浅禾秆色，稍有光泽；叶片卵形三角状卵形，长10-20厘米，宽4-7厘米，三叉或为奇数一回羽状；羽片3-5片，顶生羽片稍大，阔披针形，长5-8厘米，中部宽1.2-2厘米，先端渐尖，基部阔楔形，上部不育的叶缘有三角形粗大锯齿，下部全缘，无柄或有短柄，侧生羽片较短小，斜上，对生，镰刀状，先端短尖，基部钝圆而斜，无柄；不育羽片与能育羽片同形，但较宽且短，顶生羽片为长圆披针形，侧生羽片为卵形，叶缘除基部外均有三角形粗大锯齿。羽轴禾秆色，下面隆起，侧脉很明显，单一或分叉。叶干后纸质，褐绿色，无毛。分布区域
The plant is 15-25 centimeters tall. The rhizome is short and erect, about 1 centimeter thick, with black-brown scales at the tip. The leaves are clustered, all of one type; leaf stalks are 10-20 centimeters long, 1-2 millimeters thick, brown at the base, becoming light green towards the top with a slight gloss; leaf blades are ovate-triangular or ovate, 10-20 centimeters long, 4-7 centimeters wide, trifoliate or pinnate with odd leaflets; there are 3-5 leaflets, with the terminal leaflet slightly larger, broadly lanceolate, 5-8 centimeters long, 1.2-2 centimeters wide in the middle, gradually pointed at the tip, broadly cuneate at the base, with large triangular serrations on the infertile leaf margins in the upper part, entire margins in the lower part, sessile or shortly stalked, lateral leaflets shorter, obliquely ascending, opposite, sickle-shaped, shortly pointed at the tip, bluntly rounded and oblique at the base, sessile; infertile leaflets are the same shape as fertile leaflets, but wider and shorter, terminal leaflets are elongate lanceolate, lateral leaflets are ovate, with large triangular serrations on the leaf margins except at the base. The rachis is light green, raised underneath, with very distinct lateral veins, either single or forked. The dried leaves are papery, brownish-green, and hairless. Distribution area.

分布于西南及台湾、广东、广西等地。生长环境
Distributed in the southwest, Taiwan, Guangdong, Guangxi, and other regions. Growing environment.

生于海拔600-1200m的荫蔽干燥的钙质土或石灰岩上。
It grows on shaded, dry, calcium-rich soil or limestone at an altitude of 600-1200 meters above sea level.