Along edge of and in floodlain of river, unshaded habitats, mostly native plants (Polygonum pensylvanicum, P. lapathifolium, Bidens cernua, Penthorum sedoides, Phyla laceolata) along bank of river and in shallow drainage ditch; and weedy introduced and native species (Sporobolus vaginiflorus, Eragrostis pectinacea, Ambrosia trifida, Chaiturus marrubiastrum, Rorippa sylvestris, Polygonum scandens) along disturbed area where dirt and branches piled.
Erect herb. Foliage yellow-green; fruit yellow-green with insolated side light red-tinged. Only one plant seen in drainage ditch. Unicate for WIS.