Species: Bidens tripartita
Encyclopedia of Puget Sound
Threelobed Beggarticks is a coarse annual herb with erect, branched stems rising up to 1 m high. The opposite, narrowly elliptic leaves, 4-14 cm long, have serrated margins, and each has one short petiole. Foliage is glabrous. Flower heads are borne on long stalks in an open inflorescence at the top of the plant. The outer involucral bracts of each head are leafy and 2-7 cm long, while the inner bracts are thin and much smaller. Disk flowers are pale yellow, and ray flowers are lacking. The flattened, carrot-shaped seeds have 2-4 minutely barbed awns that stick to clothing.
Source: Encyclopedia of Life
Classification
Dicotyledoneae
Asterales
Asteraceae
Bidens
NatureServe
Classification
Ecology and Life History
Threelobed Beggarticks is a coarse annual herb with erect, branched stems rising up to 1 m high. The opposite, narrowly elliptic leaves, 4-14 cm long, have serrated margins, and each has one short petiole. Foliage is glabrous. Flower heads are borne on long stalks in an open inflorescence at the top of the plant. The outer involucral bracts of each head are leafy and 2-7 cm long, while the inner bracts are thin and much smaller. Disk flowers are pale yellow, and ray flowers are lacking. The flattened, carrot-shaped seeds have 2-4 minutely barbed awns that stick to clothing.
Source: Encyclopedia of Life