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