False Ragweed

(Parthenium hysterophorus)

Characteristics

Leaves	Flowers

Growing habits: Erect, tall, much-branched annual herb

Root anatomy: Fibrous roots from taproots

Leaf anatomy: Leaves alternate, whitish green, pinnatifid to bipinnatifid, lower leaves forming basal rosette, upper leaves entire to slightly lobed

Reproduction: Inflorescence head small, slightly convex on top, numerous in often leafy inflorescence, disk florets whitish

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