（《纲目》）
【释名】榇。
时珍曰∶梧桐名义未详。《尔雅》谓之榇，因其可为棺，《左传》所谓“桐棺三寸”是矣。
旧附桐下，今别出条。
【集解】弘景曰∶梧桐皮白，叶似青桐，而子肥可食。颂曰∶陶氏谓白桐一名椅桐。陆
机谓梓实桐皮为椅，即今梧桐。是二种俱有椅名也。《遁甲书》云∶梧桐可知日月正闰。生
十二叶，一边有六叶，从下数一叶为一月，至上十二叶。有闰十三叶，小余者。视之，则知
闰何月也。故曰梧桐不生则九州异。宗 曰∶梧桐四月开嫩黄小花，一如枣花。枝头出丝，
堕地成油，沾渍衣履。五、六月结子，人收炒食，味如菱、芡。此是《月令》“清明桐始华”
者。时珍曰∶梧桐处处有之。树似桐而皮青不 ，其木无节直生，理细而性紧。叶似桐而稍
小，光滑有尖。其花细蕊，坠下如醭。其荚长三寸许，五片合成，老则裂开如箕，谓之 鄂。
其子缀于 鄂上，多者五、六，少或二、三。子大如胡椒，其皮皱。罗愿《尔雅翼》云∶梧
桐多阴，青皮白骨，似青桐而多子。其木易生，鸟衔子堕辄生。但晚春生叶，早秋即凋。古
称凤凰非梧桐不栖，岂亦食其实乎？《诗》云∶梧桐生矣，于彼朝阳。《齐民要术》云∶梧
桐生山石间者，为乐器更鸣响也。
木白皮
【气味】缺。
【主治】烧研，和乳汁涂须发，变黄赤（时珍）。治肠痔（苏颂。《删繁方》治痔，青龙
五生膏
叶
【主治】发背，炙焦研末，蜜调敷，干即易（《肘后》）。
子
【气味】甘，平，无毒。
【主治】捣汁涂，拔去白发，根下必生黑者。又治小儿口疮，和鸡子烧存性，研掺（时
珍）。
(From *Bencao Gangmu* / Compendium of Materia Medica)
[Names] Chen.
Li Shizhen states: The etymology of the name "Wutong" is unknown. *Erya* refers to it as "Chen," because its wood can be used for coffins, as mentioned in *Zuo Zhuan*: "A coffin of paulownia three inches thick."
Previously attached under the entry for Tong (Paulownia), it is now listed separately.
[Collected Explanations] Tao Hongjing says: Wutong has white bark, leaves resembling Qingtong (Firmiana simplex), but its seeds are plump and edible. Su Song says: Tao believed that Baitong is also known as Yitong. Lu Ji stated that Zishu fruit and Wutong bark constitute Yitong, which is the current Wutong. Both species share the name "Yi." *Dunjia Shu* claims: Wutong can indicate whether a leap month exists in the solar/lunar calendar. It grows twelve leaves on one side, six per side; counting from the bottom, the first leaf represents one month, up to the twelfth leaf. A thirteenth leaf indicates a leap month, while fewer than twelve indicates a short remainder. Observing these reveals which month is intercalated. Thus it is said: "If Wutong does not grow, the customs of the Nine Provinces differ." Zong Shi says: In April, Wutong blooms with tender yellow small flowers, similar to jujube flowers. Silk-like threads emerge from branch tips, falling to the ground to form oil, staining clothes and shoes. In May and June, fruits set; people collect and roast them for food, tasting like water caltrop and Chinese chestnut. This corresponds to the *Yueling* statement: "At Qingming, Wutong begins to bloom." Li Shizhen says: Wutong is found everywhere. The tree resembles Paulownia but has green bark; the wood lacks knots, grows straight, has fine grain, and tight texture. Leaves resemble Paulownia but are slightly smaller, smooth, and pointed. Flowers have fine stamens, falling like vinegar sediment. Pods are about three inches long, composed of five segments, splitting open when mature like a winnowing basket, called "E." Seeds attach to the E, numbering five or six when abundant, or two or three when scarce. Seeds are pepper-sized with wrinkled skin. Luo Yuan in *Erya Yi* notes: Wutong provides dense shade, has green bark and white wood, resembles Qingtong but bears more fruit. Its wood grows easily; birds dropping seeds allow it to take root. However, leaves appear late in spring and wither early in autumn. Ancients said the Phoenix only perches on Wutong; perhaps it feeds on its fruit? The *Shijing* states: "Wutong grows there, facing the morning sun." *Qimin Yaoshu* states: Wutong growing among mountain rocks produces instruments with superior resonance.
Bark of Wood
[Flavor and Properties] Missing.
[Indications] Burned to ash and powdered, mixed with milk and applied to beard and hair to turn yellow-red (Li Shizhen). Treats intestinal hemorrhoids (Su Song. *Shanfan Fang* treats hemorrhoids using Qinglong Wusheng Gao).
Leaves
[Indications] Treats back carbuncle (Fa Bei). Charred until black, powdered, mixed with honey, and applied; change when dry (*Zhouhou Beiji Fang*).
Seeds
[Flavor and Properties] Sweet, neutral, non-toxic.
[Indications] Crushed for juice application to remove gray hair; new growth at the root will necessarily be black. Also treats pediatric oral ulcers; roasted with egg until carbonized (preserving nature), powdered, and dusted (Li Shizhen).