味甘，寒，无毒。主皮肤往来寒热，利小肠膀胱气。疗黄胆，金疮内塞，补中益气，
好颜色。生山谷石上。
陶隐居云∶垣衣亦名乌韭，而为疗异，非是此种类也。唐本注云∶此物即石衣也，亦曰
石苔
，又名石发。生岩石阴不见日处，与卷柏相类也。今按陈藏器本草云∶乌韭，烧灰沐发令黑
，生大石及木间阴处，青翠茸茸者，似苔而非苔也。臣禹锡等谨按日华子云∶石衣，涩，
冷
，有毒。垣衣为使，烧灰沐头长发。此即是阴湿处山石上苔，长者可四、五寸，又名乌韭。
苏云石苔非也。
主心痛血痹，面上百病，行药势。生蜀郡。三月采。
陶隐居云∶此物乃言出芮，芮久绝，俗无复真者，今人乃作之献用。唐本注云∶此物本
出高
丽，今出凉州已西，形似天雄。《本经》出蜀郡，今不复有。凉州者生沙中，独茎似鼠尾草
，叶生穗间。臣禹锡等谨按蜀本云∶味甘、辛，温。又《图经》云∶叶细周匝，生于穗间
，
出砂碛下湿地。日华子云∶无毒。主中风失音，一切冷风气，面 瘢疵，入药炮用。新罗出
者佳。
海药云∶按《南州记》云∶生东海，又新罗国。苗与附子相似，大温，有小毒。主治疥
癣，风疮，头面痕，阴囊下湿，腿无力，诸风冷气，入面脂皆好也。
味甘，性寒，无毒。主治皮肤往来寒热，通利小肠和膀胱的气机。治疗黄疸，金疮内部瘀塞，补益中气、益气力，使面色红润好看。生长在山谷的岩石上。
陶隐居说：垣衣（墙壁上的苔藓）也叫乌韭，但疗效不同，不是这一种类。《唐本草》注解说：这种植物就是石衣，也叫石苔，又名石发。生长在岩石背阴不见阳光的地方，与卷柏相似。现在根据陈藏器《本草》记载：乌韭，烧成灰用来洗头可使头发变黑，生长在大石头及树木之间的阴湿处，青翠茂盛的样子，像苔藓但不是苔藓。臣禹锡等人谨按日华子的说法：石衣，味涩，性冷，有毒。垣衣作为引经药，烧成灰洗头可促进头发生长。这就是生长在阴湿处山石上的苔藓，长的可达四、五寸，又名乌韭。苏颂认为叫石苔是不对的。
主治心痛血痹，面部各种疾病，推动药势运行。生长于蜀郡。三月采集。
陶隐居说：这种药物说是出自芮地，但芮地早已断绝供应，民间不再有真正的货，现在的人制作伪品来进献使用。《唐本草》注解说：这种药物本出高丽，现在产于凉州以西，形状像天雄。《神农本草经》记载出自蜀郡，现在已不再产。凉州产的生于沙中，独茎像鼠尾草，叶子生在穗之间。臣禹锡等人谨按《蜀本草》记载：味甘、辛，性温。又《图经》记载：叶子细小环绕，生在穗间，出产于砂碛下的湿地。日华子说：无毒。主治中风失音，一切冷风气，面部的瘢痕瑕疵，入药需炮制后使用。新罗出产的品质佳。
《海药本草》说：按《南州记》记载：生长于东海，以及新罗国。苗株与附子相似，大温，有小毒。主治疥癣，风疮，头面疤痕，阴囊下潮湿，腿部无力，各种风冷气，加入面脂中都很好。
Sweet in taste, cold in nature, non-toxic. It primarily treats alternating chills and fever (Wanglai Hanre) of the skin, promotes the free flow of Qi in the Small Intestine and Bladder. It treats jaundice (Huangdan), internal obstruction from metallic wounds (Jinchuang Neisai), tonifies the Middle Jiao and benefits Qi, and improves complexion. It grows on rocks in mountain valleys.
Tao Hongjing stated: "Yuanyi" (moss growing on walls) is also called Wujiu, but its therapeutic effects differ; it is not of this species. The *Tang Bencao* commentary notes: "This substance is Shiyi (stone moss), also called Shi Tai (stone lichen), and another name is Shi Fa. It grows in dark, sunless places on rocks, resembling Juanbai." Currently, according to Chen Cangqi's *Bencao*: "Wujiu, when burned to ash and used for washing hair, turns it black. It grows in shady places between large stones and trees, appearing lush and green like moss but not being true moss." Ministers Yu Xi et al., respectfully citing Ri Hua Zi: "Shiyi is astringent, cold, and toxic. Yuanyi serves as a guiding herb; when burned to ash and used for washing the head, it promotes hair growth. This refers to the moss growing on mountain rocks in damp, shady places, which can grow four or five cun long, and is also called Wujiu. Su Song considered the name 'Shitai' incorrect."
It primarily treats heart pain and blood bi (Xin Tong Xue Bi), various diseases of the face, and facilitates the distribution of medicinal potency. It grows in Shu Commandery. It is harvested in the third lunar month.
Tao Hongjing stated: "This drug is said to originate from Rui, but the supply from Rui has been cut off for a long time, and genuine specimens are no longer available in common practice. Nowadays, people produce imitations to offer for use." The *Tang Bencao* commentary notes: "This drug originally came from Goryeo, but now it is produced west of Liangzhou. Its shape resembles Tianxiong. The *Shennong Bencao Jing* records it as originating from Shu Commandery, but it is no longer found there. Those from Liangzhou grow in sand, with a single stem resembling Schizonepeta (Shuweicao), and leaves growing among the spikes." Ministers Yu Xi et al., respectfully citing the *Shu Bencao*: "It is sweet and pungent, warm in nature. Furthermore, the *Tujing* states: 'Leaves are fine and surround the stem, growing among the spikes, emerging from wet ground under sandy deserts.' Ri Hua Zi stated: 'Non-toxic. It treats wind-stroke with loss of voice, all types of cold wind pathogenic factors, facial scars and blemishes. For medicinal use, it must be processed (Pao). Specimens from Silla are superior.'"
The *Haiyao Bencao* states: "According to the *Nanzhou Ji*, it grows in the East Sea and in Silla. The seedling resembles Fuzi (Aconite Root). It is greatly warming and slightly toxic. It primarily treats scabies and tinea (Jie Xuan), wind sores (Feng Chuang), facial scars, dampness under the scrotum, weakness in the legs, and various wind-cold pathogenic factors. It is beneficial when added to facial cosmetics (Mianzhi)."