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Yang Er Duo (Shepherd's Purse-like Herb), with a sour and bitter taste, is slightly warm in nature. Its flower is the Mi Meng Hua (Buddleja officinalis) found in Guangdong. It enters the Liver Meridian to dispel Liver Wind, brightens the eyes, and reduces nebulae, treating dryness and photophobia of the eyes. The pointed leaves stir-fried with honey treat coughs due to Liver Meridian pathology; it is effective for chronic coughs. The leaves can be applied topically to ulcerated sores; applying them promotes tissue regeneration and flesh growth in stubborn ulcers that fail to heal over time.
── Cong Ben, Volume Upper

The leaves of Yang Er Duo have a sour and bitter taste and are slightly warm in nature. The flowers are used as official medicinal materials under the name Mi Meng Hua (Buddleja officinalis). They enter the Foot Jueyin Liver Meridian to dispel wind, brighten the eyes, and reduce nebulae. Among all ophthalmic agents, it is considered the most excellent, as recorded in "Bie Jing" (Separate Classic). This materia medica primarily describes the efficacy of its branches and leaves.
Collect the leaves, grind them into powder, and apply to treat various carbuncles, sores, and ding toxins, especially those with ulceration forming sinus tracts and failing to regenerate tissue; application yields miraculous cures. For chronic yin ulcers without pus or blood after many years, topical application is also effective.
Dry the roots, leaves, and flowers together, grind into powder, add Xue Jie (Dragon's Blood) and Bing Pian (Borneol) to make an excellent preparation for knife wounds.
Grind the bark into fine powder, store in ceramic vessels, and carry on one's person. In cases of children suffering from eye nebulae caused by liver parasites, accompanied by black halos around the mouth, blow a pinch of this powder into the nose to save the patient. This herb is named "Chong Jian Si Cao" (Herb That Kills Parasites Upon Sight) because it can transform liver parasites into water.
── Mo Ban, Volume Four

Bai Long Xu (White Dragon Beard), also known as Bai Wei (Cynanchum atratum), has a bitter and astringent taste and is slightly warm in nature. It specifically treats cold pain in the face, soreness and pain in the abdomen, traumatic injuries, and pain in the sinews and bones.
It can be taken as a single dose or ground into powder. Take two qian per dose. Swallow with distilled liquor (baijiu); alternatively, decoct in water and take with a small amount of wine.
── Cong Ben, Volume Middle

Ba Xian Cao (Eight Immortals Grass), with a pungent and bitter taste, is slightly cold in nature. It enters the Shaoyang and Taiyin meridians. It treats damp-heat in the Spleen, lingering heat in various meridians, deficiency consumptive diseases such as xu lao and tong lao, deficiency heat, vexing heat, and pain in the sinews and bones. Dampness injuring the sinews causes pain in the sinews and bones. It travels through the Small Intestine Meridian to treat five types of hot strangury, promotes urination, treats red and white turbidity, penile pain, clears vexing heat from the Blood level, and stops hematuria.
(Attached Prescription) For five types of hot strangury: red urine, urgency and distension before urination, purulent discharge at the urethral meatus, and penile pain.
Hua Shi (Talcum, 2 qian), Gan Cao (Licorice Root, 1 qian), Ba Xian Cao (8 qian), Shuang Guo Cao (2 qian). Decoct in water, and take with a little water-wine mixture.
── Cong Ben, Volume Upper