Callitriche verna L. WATER STARWORT. (As Callitriche
palustris) Ontario: Queenston, Wm. Scott, June 7, 1901 (TRT 1332); Queen
Victoria Park, Niagara Falls, M. Wilkes, June 15, 1897, 51.755; Niagara Falls,
Wm. Scott, July 15, 1897 (TRT 8219), Heimburger (1955).
Reported as rare in the Niagara Frontier
Region by Zander and Pierce (1979).