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Etymology: Iva: a Latin derivation from the mint Ajuga iva, which has a similar aroma
Plants: erect, annual, 1 1/2'- 6' tall, unbranched, coarse forb; stems smooth toward the bottom Leaves: mostly opposite, upper might become alternate; long-stalked, very widely oval, doubly toothed, roughly hairy on the top, softly fuzzy and light green on the bottom Flowers: head green to cream, no rays, no bracts; inflorescence with many, mostly stalkless heads in 10" long, large, branched clusters; blooms Aug.-Oct. Habitat: moist; shores, disturbed sites Hazardous: Careful, this plant is hazardous! Conservation Status: Native |
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© Wisconsin State Herbarium, UW-Madison
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