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(From *Bencao Shiyi* [Supplement to Materia Medica])
[Correction] Merged into the entry for "Shiruan" (Stone Moss) in *Mingyi Bielu* [Record of Famous Physicians], which was listed as having a name but no practical use.
[Names] Shiruan (*Mingyi Bielu*), Shijie (same meaning), Yuncha (*Bencao Gangmu*), Mengding Tea.
Li Shizhen stated: Its shape resembles flower stamens, and its taste is like tea, hence the name. "Shijie" is a misspelling of "Cha" (tea).
[Collected Explanations] Chen Zangqi said: Stone moss grows on the rocks of Mount Tai, resembling flower stamens; it is taken as pills or powders. It is no longer available in the world today. Wang Yin's *Book of Jin* records: Yu Bao entered Linlu Mountain, ate wild fruits, and consumed stone moss, thereby achieving longevity; this refers to this substance. He also said: Shiruan grows in the shade of rocks, similar to *Wuyou* (roof moss) or *Yuanyi* (wall lichen); it unfurls upon contact with rain, hence the name "Shiruan." In early spring, it is emerald green, opening with four leaves at the tip. Mountain people call it Shijie.
Li Shizhen stated: The *Mingyi Bielu* entry for Shiruan details its functions but does not describe its morphology. Chen Zangqi claimed it was similar to *Wuyou* and separately listed a section on Stone Moss with identical efficacy to Shiruan. This likely arose from ignorance that they are the same substance. This herb is of superior quality only when found on rocks in high mountains. People now call it Mengding Tea, which grows on the rocks of Mount Meng in Yanzhou. It forms over time due to smoke and mist infiltration and belongs to the category of lichen/moss. Locals scrape it in early spring, dry it in the sun, and gift it to others, calling it Yuncha. Its shape is white, light, and thin like flower stamens; its aroma is fragrant like mushrooms; its taste is sweet and astringent like tea. It should not be decocted for drinking but is suitable for chewing or steeping in water for consumption, providing a cool and flavorful experience. Yu Bao consumed this in the mountains merely as a substitute for tea. The path to longevity may not be entirely attributed to this substance.
[Flavor and Properties] Sweet, warm, non-toxic. Li Shizhen stated: Sweet, astringent, cool.
[Indications] Shiruan: Brightens the eyes and benefits essence and qi. Prevents hunger and thirst, lightens the body, and prolongs life (*Mingyi Bielu*). Stone Moss: Mainly used for longevity and preventing hunger (Chen Zangqi). Generates body fluids, moistens the throat, clears heat, and resolves phlegm (Li Shizhen).

(From *Rihua Bencao*)
[Correction] Merged into the Earth Category entry for "Yangtianpi" in *Bencao Shiyi*.
[Names] Yangtianpi (*Bencao Shiyi*), Jutianpi (*Bencao Shiyi*).
[Collected Explanations] Daming said: This is moss growing on damp ground that curls up after exposure to sunlight.
Chen Zangqi said: It is simply the moss-like lichen growing on wet ground.
[Flavor and Properties] Bitter, cold, slightly toxic. Chen Zangqi said: Neutral, non-toxic.
[Indications] Sudden onset of heart pain and evil pathogens: Form pills using human dirt/grease, take seven pills. Also treats equine "fan hua" ulcers; apply mixed with raw oil (Daming). Brightens the eyes (Chen Zangqi). Grind into powder and take with fresh well water to treat heatstroke (Li Shizhen).
[Attached Prescriptions] Three new prescriptions.
Body and facial carbuncles/swelling resembling snakes: Apply the water droplets formed by rain on mossy steps onto the head of the snake pattern; it will heal immediately. (Wei Shi's *Defang Fang*).
Night blindness (Akanthosis): Collect Diyancao (Ground Grass Moss) on the seventh day of the seventh lunar month or the ninth day of the ninth lunar month. Dry it in the shade and grind into powder. Take one cun bi (measure) with wine, three times daily; cure within one month. (Cui Zhiti's Prescription).
Scrotal millet-like sores: Take dried, curled moss from stagnant, wet areas, grind into powder, and apply externally. Extremely effective. (*Waitai Miyao*)