Broad-leaved Arrowhead (Sagittaria latifolia) - 2016-8-23 Russell Peterson Urban Wildlife Refuge, Wilmington, DE
http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=222000347
http://capemaywildlife.com/_templates/group_arrowheads.html
http://plants.usda.gov/core/profile?symbol=SALA2
