Giant Bristlegrass (Setaria Magna)
Poaceae (Grass Family)
Group: Monocot (Grass)
Annual grass with erect stems, native of North America. It produces arching bottlebrush like flowers or seed-heads. Seedlings tend to be very robust and grow very quickly. It is primarily found in disturbed wetland sites but is becoming more common in cultivated fields.
Leaves are alternate, lanceolate to ovate, margins are serrated, obscurely hairy, with a pair of small appendages at the base.
Stem is erect and branched, smooth to minutely hairy, 1 to 3 feet tall.
Flower is solitary, yellow on the leaf axils. Seeds are small, roughly triangular.
Root is a branching deep taproot.
Propagation is by seed.