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Oxalis corniculata, commonly known as Suanjiang (sour berry). Old texts do not record its place of origin, stating it grows by the roadside. Currently, it is abundant in low-lying wet areas and home gardens in the south, and also found in some northern regions. The leaves resemble duckweed, growing in clusters; three leaves emerge at the stem tip, with small yellow flowers between the leaves, and black fruits. Leaves are harvested in summer for use. When young and tender, children often eat them. Southerners use it to polish stone vessels, making them white as silver.

Qing Shi (Seed of Oxalis), old texts do not record its place of origin, but it is now ubiquitous. Northerners cultivate it for spinning cloth and twisting ropes. The plant is four to five or six to seven chi tall; leaves resemble ramie but are thinner, flowers are yellow, and fruits have shells similar to Malva verticillata, containing black seeds inside. Fruits are harvested in September and October, dried in the shade for use; ancient prescriptions also utilize the root.

Taraxacum mongolicum, old texts do not record its place of origin, but it is now present in plains, marshes, and fields everywhere. In early spring, shoots emerge; leaves resemble Sonchus oleraceus, with fine spines; a single stem emerges from the center, bearing a flower at the tip, yellow like gold coins; breaking the stem exudes white juice, which people also consume. Commonly called Puying (Dandelion), the name is an erroneous pronunciation of Pugongying. Boiling the plant in water to extract juice treats Ru Yong (breast abscess) in women; crushing and applying it topically to sores is also effective. It also treats "evil thorns" and fox urine thorns; applying the white juice from the roots and stems cures them quickly if applied frequently. This prescription originates from Sun Simiao's Qianjin Fang (Prescriptions Worth a Thousand Gold). The preface states: "In the night of July 15th of the fifth year of Zhen Guan, my left middle finger back touched a tree in the courtyard. By morning, I suffered unbearable pain. After ten days, the pain deepened, and the sore became increasingly swollen, colored like cooked mung beans. Having heard elders discuss this prescription, I followed the treatment. It healed immediately upon application, pain ceased, and the sore recovered. Within ten days, I was fully restored." Yang Yan's Nan Xing Fang (Southern Journey Prescriptions) also records its efficacy.