山栀又名黄枝紫、黄山枝。为茜草科(Gardenia jasminoides)常绿小灌木。茎高一、二尺至四、五尺不等,分枝较多,成丛;叶对生,椭圆形或长卵圆形;革质有光泽,全缘;夏日开花,花生于枝顶芳香甚烈,花瓣六片,色白,将谢时变淡黄色;夏末秋初大量结果,其形长椭圆形,有纵出之棱六七条,初为青绿色,霜降前后成熟时变黄赤色,肉皮薄,中芷红褐色之间与多数扁平橙黄色种子,有芳香性、味苦。山栀药用果实,功能解热清血,治头痛、心烦、黄疸、火伤、吐血、衄血、咽痛口糜、 Hawthorn, also known as Huang Zhizi, Huangshan sticks. Gardenia jasminoides evergreen shrub. Stems one or two to four to five feet in size, branching more, into clusters; leaves opposite, elliptic or long ovoid; leather shiny, entire; summer flowers, peanuts on the top of the branches Aroma is very intense, six petals, white, will fade when the pale yellow; a large number of results in the late summer and early autumn, its shape is long oval, there are seven out of the edge of the seven, the first green, yellow and yellow before and after the maturity of the yellow Red, thin skin, medium reddish-brown and most flat orange-yellow seeds, aromatic, bitter. Hawthorn medicinal fruit, functional antipyretic blood, headache, upset, jaundice, fire wounds, hematemesis, blood stasis, sore throat,