344503 Glyceria grandis S. Watson
- S. Watson in A. Gray, Manual, ed. 6: 667 (1890). Lectotype (GH): Canada: Quebec, 11. July 1858, leg. Munro (Hitchcock 1935: 865). - Glyceria maxima subsp. grandis (S. Watson) Hultén, Acta Univ. Lund., n. s., sect. 2, 38, 1: 229 (1942).
- Glyceria maxima auct., non (Hartm.) Holmb. (1919).
2n=
(1) 20 (2x, x = 10). - Canada, U.S.A. - Several reports.
(2) 28 (4x, x = 7). - Nielsen (1939).
Geography: North American.