（本经中品）
毒家、痘疹家多用此，宁不寒心。暖然齐春仁之洁，鼎新革故之象乎。
【气味】辛温，无毒。
【主治】主女人漏下亦白，血闭，阴肿，寒热，风头，侵目泪出，长肌肤，润泽颜色，
可作
【核】曰∶所在有之，吴地尤多。近钱唐笕桥亦种莳矣。春生苗，叶叶对生，花白微黄。
入伏后结子，立秋后苗枯。根长尺余，粗细不等，黄泽者为佳。修事，勿使四条一处生者，
名丧公藤。又勿用马兰根。采得刮去皮，细锉，以黄精片等分，同蒸一伏时，晒干，去黄精
用。近时用锻石蒸煮，及拌锻石暴晒，为不易蛀，并欲色白，不特失其本性，而燥烈之毒最
深，用之无忽也。当归为之使。恶旋复花，制雄黄、硫黄。
【 】曰∶楚辞以芳草比君子，而言 为多。 ，白芷也。一物多名。 也，芷也，芳
也，药也， 也，苻蓠也，泽芬也。其取象于草木之芳泽者，无所不备矣。王逸云∶行清洁
者佩芳，白 之属是也。具春生发陈之气，洁齐生物者也。合从青阳高明之上，一阴隐僻之
下，对待污浊者，齐之以洁，如女子漏下亦白，血闭阴肿寒热。此一阴之下，血浊及气浊也。
如
泽颜色，即洁颜色浊，以血洁则血华于色也。可作面脂，此不独饵可激浊，即肤受亦可表洁
矣。
(Shennong Bencao Jing [Classic of Materia Medica], Middle Grade)
Practitioners treating toxic sores and those managing smallpox/rash often use this herb; is it not chilling to the heart? It is warm and orderly, as clean as spring seeds, embodying the image of renewing the old with the new.
[Flavor and Properties] Acrid, Warm, Non-toxic.
[Indications] Primarily treats leukorrhea (white vaginal discharge) in women, amenorrhea (blood obstruction), genital swelling, alternating chills and fever, head wind disorders, tearing caused by pathogenic invasion into the eyes, promotes skin growth, and moistens and brightens complexion.
[Verification] Says: It is available everywhere, especially abundant in the Wu region. Recently, Jianqiao in Qiantang has also begun cultivating it. Seedlings emerge in spring, leaves grow opposite each other, flowers are white with a slight yellow tint. Seeds form after the beginning of Sanfu (the hottest period of summer), and the stalks wither after Start of Autumn. The root is over a chi long, varying in thickness; those with a yellowish luster are superior. In processing, do not use roots where four strands grow together at one place, known as "Sanggong Teng" (Funeral Official Vine). Also, do not use the root of Kalimeris indica (Malan). After harvesting, scrape off the bark, cut into fine shreds, mix equally with slices of Polygonatum sibiricum (Huangjing), steam together for one "Fu Shi" (a traditional time unit approx. 12 hours), dry in the sun, and remove the Huangjing before use. In recent times, calcined alum (Duan Shi) is used for steaming or mixed with calcined alum for sun-drying to prevent insect damage and achieve whiteness. This not only loses its natural nature but also possesses the deepest drying and acrid toxicity; thus, caution must be exercised in its use. Angelica sinensis (Danggui) serves as its guiding herb. It is incompatible with Inula japonica (Xuanfuhua); its toxicity can be moderated by Realgar (Xionghuang) and Sulfur (Liuhuang).
[Collected Explanations] Says: The Chu Ci uses fragrant herbs to metaphorically represent gentlemen, mentioning Bai Zhi frequently. Bai Zhi is indeed Bai Zhi. One substance has multiple names: Qi, Zhi, Fang, Yao, Qi, Fulí, Zefen. Its symbolism regarding the fragrance and moisture of plants is comprehensive. Wang Yi stated: "Those who act with cleanliness wear fragrances," and Bai Zhi belongs to this category. It possesses the qi of spring emergence and renewal, being clean and orderly in generating life. Combining the high brightness of Qingyang (Spring Yang) above with the hidden yin below, it addresses turbidity with cleanliness, just as it treats leukorrhea, amenorrhea, genital swelling, and alternating chills and fever. These conditions in the lower yin reflect turbidity in blood and qi. To moisten and brighten the complexion is to cleanse the turbid complexion; when blood is clean, the complexion becomes radiant. It can be made into facial cream. This indicates that not only internal administration can stimulate the clearing of turbidity, but even external application on the skin can manifest cleanliness.