DEVIL'S BEGGARTICKS, Bidens frondosa L. 1, entire plant; 2, seed; 3, flower head. Annual, reproducing by seed. Taproot much branched and shallow. Stems 3 to 5 feet (0.9 to 1.5 m) tall, slightly hairy and somewhat 4-sided. Most branching occurs near the top. Leaves opposite, 4-ranked, deeply pinnately divided, and covered with minute hairs. Flower heads about 1 inch (2.5 cm) in diameter, surrounded by leafy bracts. Ray flowers around the outer edge yellow, disk flowers in the center brownish-yellow. Seed flat, brown, about 1/2 inch (1.3 cm) long with 2 barbed spines attached at upper end. Found frequently on rich, moist soil in low areas and waste places. Not found in cultivated fields. Several other species similar to this one are found in the region.