How to sign: any of several plants of the genus Bidens having yellow flowers and prickly fruits that cling to fur and clothing
Similiar / Same: burr marigold, beggar's-ticks, sticktight, beggar-ticks
Categories: subshrub, suffrutex
Within this category: European beggar-ticks, spanish needles, swampy beggar-ticks, tickseed sunflower