Family: Asteraceae
giant ragweed, great ragweed, horse-cane
[Ambrosia integrifolia Muhl. ex Willd., more...]
Paul Drobot
Merel R. Black
University of Wisconsin - Madison (WIS-VP)
Etymology: Ambrosia: Greek for "food of the gods"
Plants: erect, annual, 2'-9' tall forb
Leaves: opposite, stalked, 3-5 palmately-divided lobes, upper leaves slightly winged
Flowers: inflorescence of many, small, green, bead-like heads on 10" spikes; blooms Aug.-Sept.
Fruits: seeds not on fluffy pappus
Habitat: moist; disturbed sites
Conservation Status: Native - potentially invasive
Plants: erect, annual, 2'-9' tall forb
Leaves: opposite, stalked, 3-5 palmately-divided lobes, upper leaves slightly winged
Flowers: inflorescence of many, small, green, bead-like heads on 10" spikes; blooms Aug.-Sept.
Fruits: seeds not on fluffy pappus
Habitat: moist; disturbed sites
Conservation Status: Native - potentially invasive
Flora of North America: Flora of North America Floristic Rating: Coefficient of Conservatism = 0, Wetland Indicator = FAC+ WIS DNR-Bureau of Endangered Resources: Detailed information on Wisconsin invasive species including decription, habitats, control methods USDA Plants Database: Federal Distribution and detailed information including photos Dan Tenaglia's The Missouri Flora: Fabulous photographs; detailed descriptions; color and leave arrangement key. David G. Smith's "Delaware Wilflowers": Beautiful photographs; descriptions Illinois Wildflowers: Wonderful photographs; detailed descriptions; color and leaf arrangement key Southwest School of Botanical Medicine: Britton & Brown Illustrated Flora - 2nd Edition (1913) "An Illustrated Flora of the Northern United States and Canada"
Merel R. Black
Robert W. Freckmann
Paul Drobot
Merel R. Black
Emmet J. Judziewicz
Robert W. Freckmann
Robert W. Freckmann
Paul Drobot
Christopher Noll
Merel R. Black
Matthew L. Wagner
Botanical Illustration
Botanical Illustration
Aaron_Carlson
Aaron_Carlson
