Nodding Beggarticks, Nodding Beggar Ticks, Bur Marigold: Bidens cernua (Synonyms: Bidens cernua var. cernua, Bidens cernua var. elliptica, Bidens cernua var. minima) - Rays generally present and conspicuous.
Devil's Beggarticks, Leafy Beggarticks, Sticktight, Devil's Pitchfork: Bidens frondosa - Rays absent or inconspicuous. Leaves pinnately compound. Disk flowers orangish. 5-8 outer involucral bracts.
Big Devils Beggartics, Tall Beggarticks, Western Sticktight: Bidens vulgata - Rays absent or inconspicuous. Leaves pinnately compound. Disk flowers yellowish. 10-15 outer involucral bracts.