（本经上品）
垂布有如钩之象。右肾命门火也，当用老槐之实矣。然则槐之火若龙之火欤。昼炕而
聂，夜聂而炕，互呈开阖之枢键也。
【气味】苦平，无毒。
【主治】主五内邪气热，止涎唾，补绝伤，五痔火疮，妇人乳瘕，子藏急痛。
【核】曰∶生河南平泽，近道亦有。小枝攫拿，垂布如盖。其叶青绿而细，叶大而黑者，
名杯槐；叶昼合夜开者，名守宫槐。叶之初生，季春五日而兔目，浃旬而鼠耳，更旬而始规，
再旬而叶成。四五月开赭黄花，六七月结黑褐实，作荚如连珠奇数者为贵。花未开时，状如
粟粒，采取煎汁染黄，色甚鲜美。修事∶用铜锤捶破，乌牛乳浸一宿，蒸一伏时，晒干收用
。先人云∶槐实，一名守宫。昼合夜开，是得气于阴。槐字从鬼，鬼为阴之灵。冬钻其火，
冬亦时之阴。故入五脏，入血分，入隐僻之地。有取北面不见日枝，及三更仰卧咀嚼者，真
得其窍。若气得出而不得入，阴能阖不能开，舍此无繇矣。
【 】曰∶冬取槐檀之火，槐当入肾，宜乎偏向于右，右为命门火藏故也。淮南子云∶
老槐生火，诚极阴生阳之象尔。亦可入肝，槐性畅茂，叶尤可玩，尝有香气，宛 松风，是
得木体之柔，诚肾肝之用。《庄周》云∶水中有火，乃焚大槐。故从治壮火之侵淫肤肉，五
内之真火息而邪火炽。释木云∶槐叶昼聂夜炕。故从治太阴开折之不能从阖，而涎唾妄泄，
厥阴阖折之不能转开，而乳瘕急痛，及风郁于中，而虫蚀成痔也。则凡能开不能阖，能阖不
能开者，莫不迎刃而解。设或差池，未有不反实其实，虚其虚者矣。
【本草经上品】
槐树的枝叶下垂分布，形状如同钩子。这对应右肾命门之火，因此应当使用老槐树的果实。那么槐树所蕴含的火性，是否就像龙火一样呢？白天枝叶舒展（炕），夜晚枝叶闭合（聂），昼夜交替呈现出开合的枢纽机制。
【气味】味苦，性平，无毒。
【主治功效】主治五脏内部的邪热之气，止住过多的涎唾，补益严重的创伤，治疗五种痔疮和火毒疮疡，妇女乳房结块（乳瘕），以及子宫急痛。
【核析】曰：槐树生长在河南的平原沼泽地带，邻近地区也有生长。小枝交错抓握，枝叶下垂如伞盖。它的叶子青绿且细小；叶片大而黑的，称为杯槐；叶子白天闭合、夜晚舒展的，称为守宫槐。叶子刚长出时，在季春（农历三月）第五天像兔子的眼睛，再过十天像老鼠的耳朵，又过十天开始变圆，再过二十天叶子长成。四五月开出赭黄色的花，六七月结成黑褐色的果实，呈豆荚状像连珠一样且数量为奇数的最为珍贵。花未开时，形状像粟米粒，采集后煎汁可染黄色，颜色非常鲜艳美丽。炮制方法：用铜锤敲破，用黑牛的乳汁浸泡一夜，蒸一个时辰（约两小时），晒干后收存使用。先人说：槐实又名守宫。白天闭合夜晚舒展，说明它从阴气中汲取能量。“槐”字从“鬼”，鬼是阴的灵体。冬天钻木取火，冬天也是时令中的阴。所以槐实能入五脏，入血分，进入隐蔽偏僻之处。有人选取朝北不见阳光的枝条，以及在三更天仰卧咀嚼的方法，才是真正掌握了其关键窍门。如果气只能出不能入，阴气只能闭合不能开放，除了这种方法别无他途。
【按语】曰：冬天取槐檀木摩擦生火，槐树应当入肾，适宜偏向于右侧，因为右侧是命门之火藏所在的地方。《淮南子》说：老槐树能生火，这确实是极阴产生阳气的象征。槐树也可以入肝，槐树性质畅达茂盛，叶子尤其值得玩味，常常带有香气，宛如松间清风，这是得到了木体的柔和特性，确实是肾与肝的作用。《庄子》说：水中有火，于是焚烧大槐树。所以通过顺从其特性来治疗壮火对肤肉的侵蚀，使五脏内的真火平息而邪火炽盛的情况得以解决。《释木》说：槐叶白天闭合夜晚舒展。所以通过顺从其特性来治疗太阴开阖失调导致的无法闭合，从而涎唾妄自流出；治疗厥阴开阖失调导致的无法开启，从而出现乳房结块急痛；以及风邪郁结在中焦，导致虫蚀形成痔疮的情况。那么凡是能够开而不能阖，或者能够阖而不能开的病症，都能迎刃而解。假如处理不当，没有不导致实证更实、虚证更虚的了。
[Shangpin (Superior Class) of the Benjing]
The drooping branches and leaves resemble the image of a hook. This corresponds to the Fire of the Right Kidney and Mingmen (Gate of Life), thus one should use the fruit of an old locust tree. Then, is the fire nature of the locust tree similar to Dragon Fire? During the day, the leaves spread open (kang); at night, they close up (nie). They mutually present the pivot mechanism of opening and closing.
[Flavor and Nature] Bitter, neutral, non-toxic.
[Indications] It treats pathogenic heat in the five zang organs, stops excessive saliva and phlegm, repairs severe injuries, treats five types of hemorrhoids and fire sores, women's breast masses (rujia), and acute pain of the uterus (zizang).
[Analysis] It is said: Locust trees grow in the plains and marshes of Henan, and are also found in nearby regions. The small branches intertwine, and the foliage hangs down like a canopy. Its leaves are green and fine; those with large, dark leaves are called Beihuai (Cup Locust); those whose leaves close during the day and open at night are called Shougonghuai (Gecko Locust). When the leaves first emerge, on the fifth day of the third lunar month (Jichun), they resemble rabbit eyes; after ten days, they resemble mouse ears; after another ten days, they begin to become round; after twenty more days, the leaves are fully formed. In the fourth and fifth months, they bear ochre-yellow flowers; in the sixth and seventh months, they bear black-brown fruits. Those forming pods like linked pearls with odd numbers are considered superior. Before blooming, the buds resemble millet grains; when collected and boiled for juice, they can dye yellow, producing a very fresh and beautiful color. Processing: Crush with a copper hammer, soak overnight in milk from a black ox, steam for one fushi (a two-hour period), dry in the sun, and store for use. Ancestors said: Huaisi is also known as Shougonong. Closing by day and opening by night indicates it draws qi from yin. The character "Huai" contains the radical "Gui" (ghost), which is the spirit of yin. Drilling wood for fire in winter utilizes the yin of the season. Therefore, it enters the five zang organs, the blood level, and hidden or obscure areas. Some select branches that face north and never see the sun, or chew them while lying supine at the third watch (midnight), truly grasping its secret key. If qi can exit but not enter, or if yin can close but not open, there is no other way than this method.
[Commentary] It is said: Taking the fire from Huatan wood in winter suggests that Huai enters the Kidney and is appropriately biased towards the right side, as the right side is the storage of Mingmen Fire. The *Huainanzi* states: "Old locust trees generate fire," which is indeed an image of extreme yin generating yang. Huai can also enter the Liver. Its nature is vigorous and lush; its leaves are particularly delightful, often carrying a fragrance akin to wind through pines. This obtains the softness of the Wood element, truly reflecting the function of the Kidney and Liver. The *Zhuangzi* states: "Fire within water burns the great locust tree." Thus, by treating according to its nature, one can address the invasion of vigorous fire into skin and flesh, allowing the true fire of the five zang organs to subside while extinguishing pathogenic fire. The *Shimu* states: "Locust leaves close by day and open by night." Thus, by treating according to its nature, one can address the failure of Taiyin to close due to disordered opening/closing, leading to wild discharge of saliva; and the failure of Jueyin to open due to disordered closure/rotation, leading to acute pain from breast masses; as well as wind stagnation in the middle jiao causing hemorrhoids from insect erosion. Therefore, any condition characterized by being able to open but not close, or able to close but not open, will be resolved easily. However, if mishandled, there will inevitably be cases where excess becomes more excess and deficiency becomes more deficient.