决明是一种一年生的半灌木状的豆科草本植物,又称草决明。《本草纲目》中有这样的记载:“夏初生苗,高三四尺许,根带紫色,叶似苜蓿而大,七月开黄花,结角,其子如青绿豆而锐……以明目功而名。”关于草决明的功效曾有不少神奇的传说。其中的一个是这样说的:大约两千多年以前,有位妇女因儿子走失而终日悲 Cassia is an annual semi-shrub-like leguminous herb, also known as Cassia. In the “Compendium of Materia Medica,” there is such a record: “In the early summer, the seedlings were three-four feet high, the roots were purple, and the leaves seemed to be large and large. In July, the yellow flower was opened, and the knots were angled. Their sons were green beans and sharp.... Seeing merit.” There have been many magical legends about the efficacy of Cassia. One of them said this way: About two thousand years ago, a woman suffered all day long because her son was lost.