Ambrosia artemisiifolia
Annual ragweed

Ambrosia artemisiifolia
Ambrosia artemisiifolia

Aeschynomene virginica
Ambrosia artemisifolia
Photos courtesy Renee Brecht
USDA-NRCS PLANTS Database / USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service.
Botanical name: Ambrosia artemisiifolia L
Common name: annual ragweed
Group: dicot
Family: Asteraceae
Growth type: forb/herb
Duration: annual
Origin: native
Plant height: 12-40"
Foliage: deeply bipinnately dissected, lower ones opposite, upper ones alternate
Flower: small, green; monoecious with male flowers above the female flowers
Habitat: disturbed & waste areas
Range in New Jersey: statewide
Heritage ranking, if any: n/a
Misc. Wind pollinated. Its pollen is the source of hay fever for many people.
The seeds are an important winter food for many bird species and the plants are hosts for various species of butterflies and moths.