Giant Ragweed

(Ambrosia trifida)

Characteristics

Seedling	Leaves	Flowers	Fruit

Growing habits: Erect, tall summer annual herb, freely branched, rougly pubescent, angled, striate

Root anatomy: Fibrous roots from taproot

Leaf anatomy: Leaves oppositely arranged, simple, oblanceolate when plant is young but ovate/elliptic once plant is mature, palmately divided into 3-5 ovate-lanceolate serrated lobes

Reproduction: Male flowers abundant in slender racemes in upper terminals, female flowers in leaf axils of upper leaves and petals, light green in color; woody achene fruit

^{References: Weeds of the South by Charles T. Bryson and Michael S. DeFelice}