Asteraceae/Compositae (Aster/Composit Family) Synonym(s): Bearded Beggarticks, Tickseed Sunflower Base Flower Color: YellowReproductive Phenology: Aug, Sept, Oct, NovBloom Notes: The prickly fruit of Bidens species are known as beggars'-ticks, the very common, 2-pronged "stickers" that cling to one's clothing during autumn walks. For more information about this plant, Click Here.