common ironweed, prairie ironweed, smooth ironweed
[Vernonia fasciculata subsp. fasciculata Michx., more...]
Etymology: Vernonia: for William Vernon, an English botanist
Plants: erect, perennial, 2'-6' tall forb; stems often reddish to purple
Leaves: alternate, toothed, longer than wide, lower surface hairless and pitted, upper surface smooth, center stem leaves 3" - 7" long, lance-like
Flowers: head up to 1/3" wide with violet-purple disk flowers; inflorescence 1 1/2" - 4" wide, flat, dense cluster; blooms July-Sept.
Fruits: hairy, dry seed on brownish/purple, fluffy pappus
Habitat: full sun; wet to moderate moisture; prairies, meadows, pastures; in sandy, loamy soil
Conservation Status: Native
Flora of North America: Flora of North America Floristic Rating: Coefficient of Conservatism = 5, Wetland Indicator = FACW 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 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"