United States, Illinois, DuPage, Morton Arboretum, Hidden Lake Forest Preserve, SE corner of St. Hwy. 53 & Butterfield Rd. East side of DuPage River. First level of flood plain on east side of DuPage River, disturbed area.
TRS: T39N R10E S36NW 1/4, NW 1/4
Salix; Populus; Helianthus; Prunus; Melilotus
Flower: N Fruit: Y Vegetation: Y Bud: N
Annual, very common, scattered in field & on flood plain, to 2 m tall, leaves scabrous, staminate flowers off, fruits spiny. Vouchers for plant samples for Antiaids-Anticancer Testing. Sample part: PL. NCI Code OGDK-0022-G