紫珠叶别名大风叶、白狗肠、大叶紫珠、止血草、老蟹眼、白毛柴等。《本草拾遗》中记载曰:“解诸毒物,痈疽……下瘘,蛇虺虫螫,狂犬毒,并煮汁服……。”临床中应用的紫珠叶为马鞭草科植物杜虹花的干燥叶。杜虹花常生于林中或灌木丛中。分布于浙江、江西、福建等地。一般于夏、秋二季枝叶茂盛时采收,除去杂质,洗净,切段,干燥即可。紫珠叶饮片多皱缩、卷曲,有的破碎。完整叶片展平后呈卵状椭圆形或椭圆形;先端渐尖或钝圆,基部宽楔形或钝圆,边缘有细锯齿,近基部全缘;上表面灰绿色或棕绿色,被星状毛和短粗毛,下表面淡绿色或淡棕绿色,密被黄褐色星状毛和金黄色腺点,主脉和侧脉突出, Purple leaves alias big leaves, white dog intestines, large leaves purple beads, hemostasis, crab eyes, white wool and so on. “Herbal Supplements” recorded reads: “Solution of all poison, ulcer ... ... fistula, snake venom 螫, rabies poison, and cook juice service.” Clinical application of purple beads for the Verbenaceae plants Du Hong Hua Dry leaves. Du Hong flowers often in the forest or shrubs. Distributed in Zhejiang, Jiangxi, Fujian and other places. Generally in the summer and autumn when the leaves of lush harvest, remove impurities, wash, cut, dry. Violet bead leaf pieces more shrinkage, curly, and some broken. Leaves flattened after ovate oval or ellipsoid; apex acuminate or obtuse, base broadly cuneate or obtuse, margin serrulate, nearly basally entire; upper surface grayish green or brownish green, stellate hairy And short hairs, pale green or light brownish green on lower surface, densely yellowish brown stellate hair and golden glandular dots, prominent in main veins and lateral veins,