Bidens hillebrandiana ssp. hillebrandiana (kookoolau), is a short-lived perennial herb in the Asteraceae (sunflower) family, 20 to 30 cm (8 to 12 in) tall. Leaves rarely simple, usually pinnately or bipinnately compound, 3.5 to 8 cm (1 to 3 in) long including petiole, leaflets 3 to 9, fleshy, ovate...