（《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）。
（《本草纲目》）
【释名】榇。
李时珍说：梧桐的名称由来不详。《尔雅》称它为“榇”，因为它的木材可以做棺材，就是《左传》中所说的“桐棺三寸”。
以前附在桐树条目下，现在单独列出这一条。
【集解】陶弘景说：梧桐树皮是白色的，叶子像青桐，但果实肥大可以食用。苏颂说：陶氏认为白桐又名椅桐。陆机认为梓树的果实、梧桐的皮叫做椅，就是现在的梧桐。这两种树都有“椅”的名字。《遁甲书》说：梧桐可以知道日月是否置闰。它长出十二片叶子，一边六片，从下数第一片代表一个月，直到第十二片叶子。如果有闰月则是第十三片叶子，如果小余（不足一月）则没有。看这些叶子，就知道哪个月是闰月。所以说如果梧桐不生长，那么九州的风俗就会不同。宗奭说：梧桐在四月开出嫩黄色的小花，就像枣花一样。枝头伸出丝状物，落到地上变成油，沾湿衣服和鞋子。五、六月结出果实，人们收集起来炒着吃，味道像菱角和芡实。这就是《月令》中说的“清明时节梧桐开始开花”。李时珍说：梧桐到处都有。树形像桐树但树皮是青色的，木质没有节疤且笔直生长，纹理细腻而质地紧密。叶子像桐叶但稍小，表面光滑有尖头。花朵细蕊，落下时像醋糟。果荚长约三寸左右，由五片合成，老了以后裂开像簸箕，称为“鄂”。种子附着在鄂上，多的有五六个，少的有二三个。种子大小如胡椒，表皮皱缩。罗愿在《尔雅翼》中说：梧桐树荫浓密，青皮白骨，比青桐多果实。它的木头容易生长，鸟儿衔着种子掉落就能生根。只是晚春才长叶子，早秋就凋谢了。古人称凤凰非梧桐不栖息，难道也是因为它吃梧桐的果实吗？《诗经》说：“梧桐生长在那里，向着朝阳。”《齐民要术》说：生长在山石间的梧桐，制作乐器声音更响亮。
木白皮
【气味】缺。
【主治】烧成研末，与乳汁混合涂抹须发，可使变黄赤色（李时珍）。治疗肠痔（苏颂。《删繁方》治疗痔疮用青龙五生膏）。
叶
【主治】治疗发背（背部痈疽），烤焦后研成粉末，用蜂蜜调和敷贴，干了就更换（《肘后备急方》）。
子
【气味】甘，平，无毒。
【主治】捣汁涂抹，能拔去白发，根部必定生出黑发。又治疗小儿口疮，与鸡蛋一起烧至存性，研末撒敷（李时珍）。
(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).