annual bur-sage, more...
[Ambrosia artemisiifolia var. elatior L., more]
Etymology: Ambrosia: Greek for "food of the gods"
Plants: erect, annual, 12"-40" tall forb with upper branches; taprooted
Leaves: divided more than once, feathery or fern-like, lower leaves opposite, upper leaves alternate
Flowers: inflorescence of many, small, green, bead-like heads on 6" spikes; blooms Aug.-Sept.
Fruits: seeds not on fluffy pappus
Habitat: disturbed sites
Conservation Status: Native
Flora of North America: Flora of North America Floristic Rating: Coefficient of Conservatism = 0, Wetland Indicator = FACU WIS DNR-Bureau of Endangered Resources: Detailed information on Wisconsin invasive species including decription, habitats, control methods Atlas of the Wisconsin Prairie and Savanna Flora: by T.S. Cochrane & H.H. Iltis: habitat, distribution infomation / flowering and fruiting times USDA Plants Database: Federal Distribution and detailed information including photos David G. Smith's "Delaware Wilflowers": Beautiful photographs; descriptions Dan Tenaglia's The Missouri Flora: Fabulous photographs; detailed descriptions; color and leave arrangement key. USDA Agricultural Research Service (ARS): Images of seeds, fruits, embryos, etc. 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"