Nodding Beggarticks, Bur Marigold: Bidens cernua (Synonyms: Bidens cernua var. cernua, Bidens cernua var. elliptica, Bidens cernua var. minima) - Flower heads lined with ray flowers 1.5 cm long, or occasionally lacking. Leaves toothed to nearly entire, not lobed.
Devil's Beggarticks, Leafy Beggarticks, Sticktight, Devil's Pitchfork: Bidens frondosa - Flower heads all discoid or the rays very inconspicuous. Leaves lobed. The petioles measure 1-6 cm long and are often winged.
Three-lobed Beggarticks: Bidens tripartita (Synonym: Bidens connata) - Flower heads all discoid or the rays very inconspicuous. Leaves lobed (with a pair of lateral lobes) or deeply parted, but not pinnately compound. Leaves trifoliate or often with 5 leaflets. The petioles measure 1-6 cm long and are often winged. Disk flowers orange. 5-8 outer involucral bracts may be found on the involucre.
Big Devils Beggartics, Tall Beggarticks, Western Sticktight: Bidens vulgata - Flower heads all discoid or the rays very inconspicuous. Leaves trifoliate or often with 5 leaflets. The petioles measure 1-6 cm long and are often winged. Disk flowers pale yellow. 10-16 outer involucral bracts are found on the involucre.