（宋开宝）
庄周以松柏独受命于地，冬夏青青比舜之受命于天，柽之从圣，亦以此欤。
【气味】咸温，无毒。
【主治】主剥驴马血入肉毒，取木片火炙熨之，并煮汁浸之。
【核】曰∶出河西，所在亦有。喜生沙地水旁，插之便生。干小枝弱，皮赤如绛，叶整
如丝。一日三眠起，一岁三秀实，穗长三五寸，如蓼花，水红色，婀娜可爱。尔雅翼云∶柽，
河柳也。郭璞以为河旁赤茎小杨也，天之将雨，柽先起气以应之，故一名雨师，字从柽。字
说云∶知雨而应，与于天道，木性虽仁圣矣，犹未离夫木也。小木既圣矣。仁不足以明之，
当音 ，为赤之贞。神降而为赤，曰柽也。非独知雨，亦负霜雪，有异余柳。段成式云∶赤
白柽，出凉州。大者为炭，入灰汁中，可以煮铜。则柽又有白色者矣。农书云∶山柳白而明，
河柳赤而脆。南都赋注云∶柽似柏而香，柽中有脂，称柽乳云。
先人云∶柽柳不与生长收藏相流通，超五行，纯二气，无杀罚，唯生予。顾阴阳气和而
雨，先知之应，可类推矣。当匹阴阳和平之人，启阴阳自和之汗。
【 】曰∶诗疏称柽柳曰雨师。谓其具通而先识也。故天将雨，必先起气以应之。经云∶
地气上为云，天气下为雨，雨出地气，云出天气。亦可称柽柳曰云母矣。尔雅一名西河。河
者水之源，水之伯也。一岁三花，一日三眠三起，即其气三，三而三之，合为九野；九野为
九藏，九藏者，神藏五，形藏四也。然则柽柳功力，不独仅通假气为痞，剥驴马血入肉毒而
已。缪仲淳先生本草经疏，广之以治沙疹，此不独取其能通，又取其象形。疹亦三显三隐，
三而三之，合为九烹，以应九藏。人能于此从指事会意，假借转注，观色身无病不可治，世
界无物不是药矣。
（诗云∶启之辟之，其柽其椐，然则柽亦良木矣。
（宋开宝）
庄子认为松柏独自承受大地的使命，冬夏常青，这好比舜帝承受上天的使命。柽柳追随圣人，也是因为这个原因吧。
【气味】味咸，性温，无毒。
【主治】主治驴马血液进入肌肉引起的中毒，取柽柳木片用火烤热后熨烫患处，并煮汁浸泡。
【核】曰：柽柳产于河西地区，各地也有生长。喜欢生长在沙地和水边，扦插即可成活。树干细小，枝条柔弱，树皮红得像深红色一样，叶子完整如丝线。一天中三次休眠和苏醒，一年中三次开花结果，穗长三到五寸，像蓼花一样，水红色，姿态柔美可爱。《尔雅翼》说：柽，就是河柳。郭璞认为是河边赤茎的小杨树，天气将要下雨时，柽柳先升起气机来响应它，所以又名雨师，字形从“柽”。《字说》说：知道下雨而应和，参与天道运行，虽然树木的本性是仁圣的，但仍未脱离木的属性。小树既然已经具有圣德，仅用“仁”不足以说明它，应当读作chēng，作为红色的正色。神降临表现为红色，称为柽。不仅知道下雨，还能承受霜雪，与其他柳树不同。段成式说：有赤白两种柽柳，产于凉州。大的可以做炭，放入灰汁中，可以熔化铜。那么柽柳又有白色的了。农书说：山柳白色且明亮，河柳红色且脆。《南都赋注》说：柽柳像柏树但有香味，柽柳中有脂液，称为柽乳。
先父说：柽柳不与生长收藏的过程相流通，超越五行，纯粹由二气构成，没有杀伐惩罚，只有生养赋予。考虑到阴阳之气和谐则下雨，它能先知并应和，道理可以类推。应当将其比作阴阳平和的人，开启阴阳自我调和的汗液。
【按】曰：《诗疏》称柽柳为雨师。谓其具备通达并能预先识别的特性。所以天要下雨时，它必先升起气机来响应。医经说：地气上升成为云，天气下降成为雨，雨出自地气，云出自天气。也可以称柽柳为云母。《尔雅》中一名西河。河是水的源头，水的伯长。一年开三次花，一天三次休眠三次苏醒，这就是它的“气”数为三，三乘以三，合为九野；九野对应九藏，九藏包括神藏五个，形藏四个。既然如此，柽柳的功效，不仅仅只是通过通利假气来消除痞块，治疗驴马血液入肉毒而已。缪仲淳先生的《本草经疏》，扩展其用途以治疗沙疹，这不仅取其能通利的特性，又取其象形的特点。疹子也是三次显现三次隐没，三乘以三，合为九烹，以应合九藏。人若能在此处从指事会意，通过假借转注，观察色身无病不可治，世间万物没有不是药的。
(Song Kaibao)
Zhuangzi believed that pine and cypress alone receive their mandate from the earth, remaining green in both winter and summer, which is akin to Emperor Shun receiving his mandate from Heaven. Tamarix (Chengliu), following the sage, shares this attribute as well.
[Flavor and Nature] Salty, warm, non-toxic.
[Indications] Primarily treats poisoning caused by donkey or horse blood entering the flesh. Take slices of tamarix wood, heat them over fire, and apply as a hot compress; also decoct the juice for soaking.
[Analysis] Says: It originates from the Hexi region but is found elsewhere. It thrives in sandy areas near water and propagates easily via cuttings. The trunk is slender with weak branches, the bark is crimson red like deep vermilion, and the leaves are intact like silk threads. It undergoes three cycles of dormancy and awakening daily, and produces fruit three times a year. The spikes are three to five inches long, resembling knotweed flowers, water-red in color, and gracefully lovely. *Erya Yi* states: "Cheng" refers to river willow. Guo Pu considered it a small poplar with red stems by the river. When rain is imminent, tamarix first emits qi to respond, hence its name Yushi (Rain Master). The character derives from "cheng". *Shuozhi* explains: Knowing rain and responding aligns with the Way of Heaven. Although the nature of wood is benevolent and sage-like, it has not transcended the element of Wood. Since the small tree possesses sagehood, "benevolence" alone is insufficient to describe it; it should be pronounced chēng, representing the true color of red. When spirit descends manifesting as red, it is called Cheng. Unlike other willows, it not only anticipates rain but also withstands frost and snow. Duan Chengshi notes: There are white and red varieties of tamarix from Liangzhou. The larger ones can be made into charcoal; when placed in ash lye, they can melt copper. Thus, there are white tamarix trees. Agricultural texts state: Mountain willow is white and bright, while river willow is red and brittle. Notes on *Nandu Fu* state: Tamarix resembles cypress but is fragrant; it contains resin, known as Chengru (Tamarix Milk).
My late father said: Tamarix does not circulate through the processes of growth, flourishing, harvesting, and storage. It transcends the Five Elements, consisting purely of Yin and Yang Qi, lacking destructive punishment, possessing only generative nourishment. Considering that harmonious Yin and Yang Qi brings rain, its ability to anticipate and respond allows for analogical reasoning. It may be compared to individuals with balanced Yin and Yang, capable of inducing sweat through self-harmonization of Yin and Yang.
[Commentary] Says: The commentary on the *Classic of Poetry* calls tamarix "Yushi" (Rain Master), attributing to it the qualities of connectivity and prescience. Thus, before rain, it rises in qi to respond. The Classics state: Earthly Qi rises to form clouds, Heavenly Qi descends to form rain; rain emerges from earthly Qi, clouds from heavenly Qi. It may also be referred to as Yunmu (Cloud Mother). In *Erya*, it is alternatively named Xihe (Western River). The river is the source of water, the elder brother of waters. Blooming three times a year and undergoing three sleep-wake cycles daily reflects its Qi number as three. Three multiplied by three yields Nine Fields; Nine Fields correspond to Nine Viscera, comprising five Spirit Viscera and four Form Viscera. Therefore, the efficacy of tamarix extends beyond merely unblocking false Qi to resolve stagnation or treating blood-poisoning from animal ingress. Mr. Miu Zhongchun, in his *Bencao Jing Shu*, expanded its use to treat sand-rash (shazhen). This utilizes not only its unblocking property but also its morphological symbolism. Rashes also appear and disappear three times; three multiplied by three forms Nine Cookings, corresponding to the Nine Viscera. If one can grasp the meaning through ideographic composition and semantic extension here, observing that no physical body is incurable, then all things in the world become medicine.
(The *Book of Songs* says: "Open it up, clear it away, the tamarix and the ju," indicating that tamarix is indeed a fine timber.)