Det.: Robert R. Haynes (UNA, ALU) 1995 Det.: James E. Ellis (SIU) 1963 AS Potamogeton americanus Cham. & Schl. Det.: R.E. Richardson 1916 AS Potamogeton americanus Cham. & Schl.
R.E. Richardson
s.n.
1916-07-30
2016-07-30
United States, Illinois, Mason, Thompson's Lake, cut-road, Illinois River, Havana.