（宋《嘉 》）
【释名】金钏草（《图经》）、凤尾草（《纲目》）、七星草。
时珍曰∶即石韦之有金星者。《图经》重出七星草，并入。
【集解】禹锡曰∶金星草，西南州郡多有之，以戎州者为上。喜生背阴石上净处，及竹
箐中少日色处，或生大木下，及背阴古瓦屋上。初出深绿色，叶长一、二尺，至深冬背生黄
星点子，两两相对，色如金，因得金星之名。无花实，凌冬不凋。其根盘屈如竹根而细，折
之有筋，如猪马鬃。五月和根采之，风干用。
颂曰∶七星草生江州山谷石上。叶如柳而长，作蔓延，长二、三尺。其叶坚硬，背上有
黄点如七星。采无时。
【气味】苦，寒，无毒。颂曰∶微酸。
崔 曰∶制三黄、砂、汞、矾石。
【主治】发背痈疮结核，解硫黄丹石毒，连根半斤，酒五升，银器煎服，先服石药悉下。
亦可作末，冷水服方寸匕。涂疮肿，殊效。根浸油涂头，大生毛发（《嘉 》）。乌髭发（颂）。
解热，通五淋，凉血（时珍）。
【发明】颂曰∶但是疮毒，皆可服之。然性至冷，服后下利，须补治乃平复。老年不可
辄服。
宗 曰∶丹石毒发于背，及一切痈肿。以其根叶二钱半，酒一大盏，煎服，取下黑汁。
不惟下所服石药，兼毒去疮愈也。如不饮酒，则为末，以新汲水服，以知为度。
时珍曰∶此药大抵治金石发毒者。若忧郁气血凝滞而发毒者，非所宜也。
【附方】旧一，新二。
五毒发背∶金星草和根净洗，慢火焙干。每四两入生甘草一钱，捣末，分作四服。每服
用酒一升，煎二、三沸，更以温酒三、二升相和，入瓶器内封固，时时饮之。忌生冷油肥毒
物。（《经验方》）。
热毒下血∶金星草、陈干姜各三两，为末。每服一钱，新汲水下。（《本事方》）。
脚膝烂疮∶金星草背上星，刮下敷之，即干。（《集简方》）。
（出自宋代《嘉祐本草》）
【释名】金钏草（出自《图经本草》）、凤尾草（出自《本草纲目》）、七星草。
李时珍说：这就是石韦（Pyrrosiae Folium，一种蕨类植物的叶子）上带有金星斑点的品种。《图经本草》中重复列出了七星草，现将其合并于此。
【集解】苏颂曰：金星草在西南各州郡多有生长，以戎州出产的为上品。它喜欢生长在背阴岩石的干净处，以及竹林中阳光较少的位置，或者生长在大树下，以及背阴的古瓦屋顶上。刚长出时呈深绿色，叶片长一、二尺，到了深冬背面会长出黄色的星状斑点，两两相对，颜色像金子一样，因此得名“金星”。它没有花和果实，越冬不凋谢。它的根盘曲如竹根但较细，折断后有筋脉，像猪马的鬃毛。五月连根采挖，风干后使用。
苏颂说：七星草生长在江州山谷的岩石上。叶子像柳叶但更长，呈蔓延状生长，长二、三尺。叶片质地坚硬，背面有黄点如同七星。随时可以采集。
【气味】味苦，性寒，无毒。苏颂说：味道微酸。
崔氏说：能制约三黄（黄连、黄芩、黄柏）、朱砂、水银、矾石。
【主治】治疗发背痈疮及结核，解除硫黄和丹石类药物中毒。取连根半斤，酒五升，用银器煎煮服用，先服下后，之前服用的石药会全部排出。也可以研成粉末，用冷水送服一方寸匕。外涂疮肿，效果显著。根部浸泡油中涂抹头部，可促进头发大量生长（出自《嘉祐本草》）。使胡须头发变黑（苏颂）。
清热，通利五种淋证（小便频数短涩、滴沥刺痛等症），凉血（李时珍）。
【发明】苏颂说：凡是疮毒，都可以服用此药。然而其性质极冷，服用后会导致腹泻，必须通过补益调理才能恢复平静。老年人不可随意服用。
寇宗奭说：丹石毒发作于背部，以及一切痈肿。取根叶二钱半，酒一大盏，煎煮服用，可排出黑色汁液。不仅能排出所服的石药，还能去除毒素并使疮疡愈合。如果不饮酒，则研成粉末，用新汲取的冷水送服，以见效为度。
李时珍说：此药大致用于治疗金石类药物引发的毒证。如果是因忧郁导致气血凝滞而引发的毒证，则不适合使用。
【附方】旧方一个，新方两个。
五毒发背：金星草连同根洗净，用慢火焙干。每四两加入生甘草一钱，捣碎成末，分作四次服用。每次服用时用酒一升，煎煮二、三沸，再与温酒三、二升混合，装入瓶器内密封保存，时时饮用。忌食生冷、油腻及有毒食物。（出自《经验方》）。
热毒下血：金星草、陈干姜各三两，研成粉末。每次服用一钱，用新汲取的冷水送服。（出自《本事方》）。
脚膝烂疮：刮下金星草背面的星点敷贴患处，即可干燥愈合。（出自《集简方》）。
(From the Song Dynasty *Jiayou Bencao*)
[Names] Jin Chuan Cao (Golden Bracelet Grass, from *Tujing Bencao*), Feng Wei Cao (Phoenix Tail Grass, from *Bencao Gangmu*), Qi Xing Cao (Seven Star Grass).
Li Shizhen stated: This is the variety of Shi Wei (Pyrrosiae Folium, a fern leaf) that bears golden star-like spots. The *Tujing Bencao* listed Qi Xing Cao separately; it is now merged here.
[Collection and Explanation] Su Song said: Jin Xing Cao is found in many prefectures in the southwest, with those from Rongzhou being of the highest quality. It prefers to grow in clean places on shaded rocks, in bamboo thickets where there is little sunlight, under large trees, or on the shaded roofs of ancient tile houses. When first emerging, it is deep green, with leaves one to two chi long. By late winter, yellow star-shaped spots appear on the back of the leaves, facing each other in pairs, colored like gold, hence the name "Jin Xing" (Golden Star). It has no flowers or fruits and does not wither in winter. Its roots are coiled like bamboo roots but finer; when broken, tendons remain, resembling the bristles of pigs or horses. It is harvested whole, including roots, in May and used after air-drying.
Su Song said: Qi Xing Cao grows on rocks in the valleys of Jiangzhou. The leaves resemble willow leaves but are longer, growing in a creeping manner, reaching two to three chi in length. The leaves are tough, with yellow spots on the back resembling seven stars. It can be harvested at any time.
[Properties and Flavor] Bitter, cold, non-toxic. Su Song added: Slightly sour.
Cui Shi said: It can counteract the effects of San Huang (Three Yellows: Coptidis Rhizoma, Scutellariae Radix, Phellodendri Cortex), Zhusha (Cinnabaris), Shu Gong (Hydrargyrum), and Fanshi (Alumen).
[Indications] Treats Fa Bei (carbuncles on the back) and sores with nodules; resolves toxicity from sulfur and Dan Shi (mineral pills). Take half jin of the herb with roots, five sheng of wine, and decoct in a silver vessel for oral administration. After ingestion, previously ingested mineral drugs will be expelled. Alternatively, grind into powder and administer orally with cold water using a Fang Cun Bi (one square-inch measure). Applied externally to sores and swelling, it yields remarkable results. Root soaked in oil applied to the scalp promotes abundant hair growth (*Jiayou Bencao*). Darkens beard and hair (Su Song).
Clears heat, unblocks the five types of Lin syndrome (dysuria characterized by frequency, urgency, and pain), and cools blood (Li Shizhen).
[Elucidation] Su Song said: It can be taken for all kinds of toxic sores. However, its nature is extremely cold; after consumption, diarrhea may occur, requiring tonic treatment to restore balance. Elderly people should not take it casually.
Kou Zongshi said: For Dan Shi toxicity manifesting on the back, as well as all kinds of carbuncles and swellings, take two and a half qian of root and leaves, decoct in one large cup of wine, and ingest. Black fluid will be discharged. This not only expels ingested mineral drugs but also removes toxins and heals sores. If alcohol is not consumed, grind into powder and take with freshly drawn cold water, stopping when efficacy is achieved.
Li Shizhen said: This medicine is generally used to treat toxicity induced by metallic and mineral substances. It is not suitable for toxicity caused by depression leading to stagnation of Qi and blood.
[Attached Prescriptions] One old prescription, two new prescriptions.
Wu Du Fa Bei (Five Toxins Carbuncle on Back): Clean Jin Xing Cao with roots, dry slowly over low fire. Mix four liang with one qian of raw Gan Cao (Licorice Root), grind into powder, and divide into four doses. For each dose, decoct in one sheng of wine until boiling two or three times, then mix with three to two sheng of warm wine, seal in a bottle, and drink occasionally. Avoid cold, raw, greasy, and toxic foods (*Jingyan Fang*).
Re Du Xia Xue (Lower Bleeding due to Heat Toxicity): Jin Xing Cao and Chen Gan Jiang (Aged Dried Ginger), each three liang, ground into powder. Take one qian per dose with freshly drawn cold water (*Benshi Fang*).
Jiao Xi Lan Chuang (Ulcerated Sores on Feet and Knees): Scrape the star spots from the back of Jin Xing Cao leaves and apply to the affected area; it will dry immediately (*Jijian Fang*).