味苦，寒。主热，去三虫。叶∶捣，传猪创，饲猪，肥大三倍。生山谷。
《名医》曰∶生河内。
案∶《说文》云∶梓，楸也，或作 ，椅梓也。楸，梓也； ，楸也。《尔雅》云∶槐
，小叶曰 。郭璞云∶槐，为楸楸；当细叶者，为 ；又大而 ，楸。郭璞云∶老乃皮粗
，者为楸。又椅梓，郭璞云∶即楸。《毛诗》云∶椅，桐梓漆。《传》云∶椅，梓属。
陆玑云∶梓者，楸之疏理白色而生子者，梓、梓关；桐皮，曰椅。
味辛，苦。主养肾气、内伤、阴衰，利筋骨皮毛。实∶杀蛊毒，破积聚，逐风痹。一名
鬼目。生山谷。
《名医》曰∶生华阴。二月、四月采实，阴干。
味苦，平。主蛊毒、鬼注、鬼魅、邪气在脏中，除咳逆寒热。一名凌泉，一名大就。生
山谷。
《吴普》曰∶蜀，黄环，一名生刍，一名根韭。神农、黄帝、岐伯、桐君、扁鹊∶辛；
一经∶味苦，有毒。二月生。初出正赤，高二尺；叶黄，员端、大茎，叶有汗，黄白。五月
实员，三月采根。根黄，从理如车辐，。解治蛊毒（《御览》）。
《名医》曰∶生蜀郡。三月采根，阴干。
案∶《蜀都赋》有黄环。刘逵云∶黄环，出蜀郡。沈括《补笔谈》云∶黄环，即今朱藤
也。天下皆有，叶如槐，其花穗悬紫色如葛，花可作菜食，火不熟，亦有小毒。京师人家园
圃中，作大架种之，谓之紫藤花者，是也。
梓白皮：味苦，性寒。主治热证，驱除体内三种寄生虫。梓叶：捣碎后敷于猪的伤口，或喂给猪吃，可使猪体重增加三倍。生长在山谷中。
《名医别录》记载：产于河内郡。
石南：味辛、苦。主治滋养肾气、治疗内伤、阴精亏损，通利筋骨皮毛。果实：能杀灭蛊毒，破除积聚之邪，驱逐风痹。又名鬼目。生长在山谷中。
《名医别录》记载：产于华阴。二月、四月采集果实，阴干备用。
黄环：味苦，性平。主治蛊毒、鬼注（一种传染病）、鬼魅（指精神异常或邪祟致病）、邪气滞留脏腑之中，消除咳嗽和气逆、寒热往来。又名凌泉，又名大就。生长在山谷中。
吴普记载：蜀地的黄环，又名生刍，又名根韭。神农、黄帝、岐伯、桐君、扁鹊认为其味辛；另有医家认为味苦，有毒。二月发芽。刚长出时呈正红色，高二尺；叶子黄色，顶端圆形，茎粗大，叶面有汗状物，颜色黄白。五月结圆果，三月采集根部。根部黄色，纹理像车轮辐条一样放射状排列。能解治蛊毒（引自《太平御览》）。
《名医别录》记载：产于蜀郡。三月采集根部，阴干备用。
考证：《蜀都赋》中提到黄环。刘逵说：黄环产于蜀郡。沈括在《补笔谈》中说：黄环就是现在的朱藤。各地都有，叶子像槐树，花穗悬挂，紫色如葛藤，花可作蔬菜食用，若用火煮不熟则有小毒。京城人家园圃中，搭建大架子种植，称为紫藤花的，就是这种植物。
Cortex Catalpae: Bitter in flavor, cold in nature. Primarily treats heat syndromes and expels three types of intestinal parasites (San Chong). Leaves: Crushed and applied externally to pig wounds, or fed to pigs, causing them to gain three times their body weight. Grows in mountain valleys.
*The Classic of Famous Physicians* records: Grows in Henei Commandery.
Shinan (Rhododendri Daurici Folium): Pungent and bitter in flavor. Primarily nourishes Kidney Qi, treats internal injuries, and Yin deficiency; benefits the sinews, bones, skin, and hair. Fruits: Kills gu poison (parasitic disease), breaks up accumulations, and drives out wind-bi syndrome. Also known as Guimu. Grows in mountain valleys.
*The Classic of Famous Physicians* records: Grows in Huayin. The fruits are harvested in the second and fourth lunar months and dried in the shade.
Huanhuan (Bignoniae Caulis): Bitter in flavor, neutral in nature. Primarily treats gu poison, Guizhu (a contagious disease characterized by wasting and fever), Gui Mei (spiritual afflictions or mental disorders), and pathogenic qi lodged within the zang organs; eliminates cough with rebellious Qi and alternating chills and fever. Also known as Lingquan, and also known as Da Jiu. Grows in mountain valleys.
Wu Pu records: In Shu, Huanhuan is also called Sheng Chu, and also called Gen Jiu. Shennong, the Yellow Emperor, Qibo, Tongjun, and Bian Que considered it pungent; another school considers it bitter and toxic. It sprouts in the second lunar month. When first emerging, it is bright red and two chi tall; the leaves are yellow with rounded tips, on thick stems, with a sweaty appearance on the leaf surface, colored yellowish-white. It bears round fruits in the fifth lunar month; the roots are harvested in the third lunar month. The roots are yellow, with fibers radiating like the spokes of a cartwheel. It resolves and treats gu poison (cited from *Taiping Yulan*).
*The Classic of Famous Physicians* records: Grows in Shu Commandery. The roots are harvested in the third lunar month and dried in the shade.
Textual research: *Shu Du Fu* mentions Huanhuan. Liu Kui states that Huanhuan originates from Shu Commandery. Shen Kuo in *Supplement to Pen Talks* states that Huanhuan is the current *Campsis grandiflora* (Purple Trumpet Vine). It is found everywhere; its leaves resemble those of the locust tree, its flower spikes hang down and are purple like kudzu; the flowers can be eaten as vegetables, but if not cooked thoroughly by fire, they possess slight toxicity. In gardens around the capital, people grow it on large trellises, calling it Ziteng Hua (Purple Wisteria Flower); this is the plant referred to.