Leaves sessile or very short petioled; flowers showy.
Don E. Eyles, A Guide and Key to the Aquatic Plants of the Southeastern United States (Wahington D.C.:U.S. Government Printing Office, 1944) 59
1670×2400, 547.8 KiB
712×1024, 85.2 KiB
445×640, 45.9 KiB
222×320, 17.9 KiB