Amaranthus tuberculatus (Moq.) J.D.Sauer
Family: Amaranthaceae
rough-fruited amaranth, rough-fruited water-hemp, tall water-hemp
Amaranthus tuberculatus image
Christopher Noll  
Etymology: Amaranthus: from the Greek amarantos for "unfading," referring to the long-lasting flowers
Plants: erect or drooping, annual, up to 6' tall forb with many branches
Flowers: red to brown, tiny, 0-5-parted; inflorescence of many densely-flowered, rounded, usually separated spikes from the leaf axils and at the end of the stem
Habitat: moist; usually ditches and shores
Conservation Status: Native