Artemisia annua is an annual herb, erect, much branched, 30 cm to 3 m tall; sweet smelling.
Leaves alternate, about 2-10 cm long, fern-like, two or three times pinnately divided, ultimate segments linear, margins toothed, persistent into winter.
Flowers pale greenish, very small, in compact heads that arise from a bract-covered base (receptacle), flowers tubular, radially symmetrical (disc flowers) only, heads 0.2 cm high, basal bracts membranous, rounded, nearly covering flowers, heads short-stalked, often nodding; inflorescence openly branched, leaves of inflorescence reduced; wind pollinated, Aug.-Nov.
Fruit dry, achenes.
Wetland status: FACU.
Frequency in NYC: Infrequent.
Habitat: Open areas, fill soils.