United States, Illinois, DuPage, Morton Arboretum, Hidden Lake Forest Preserve, SE corner of St. Hwy. 53 & Butterfield Rd. East side of DuPage River. Marsh area adjacent DuPage River. In muck & river eddy.
41.828369 -88.045795 +-204m. WGS84
TRS: T39N R10E S36NW 1/4, NW 1/4
based on collectors description
Salix; Populus (around edge); Scirpus; Typha (in water)
Flower: N Fruit: Y Vegetation: Y Bud: N
Perennial, common, to 5 dm tall, all leaves sagittate, achenes with style at right angles. Sample part: PL. NCI Code 0GDK-0043-C.