United States, Illinois, DuPage, Morton Arboretum, 1 mile N of Lisle off I-88. Japanese Island, east side.
Sagittaria; Carex; Asclepias
Flower: Y Fruit: N Vegetation: Y Bud: N
Common, perennial, spontaneous, 1.5 m tall, 5 dm wide, white flowers. Special collections vouchering the spontaneous plant of The Morton Arboretum - 2000