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$modus 1: smartphone
Sagittaria ambigua
Sagittaria ambigua J.G.Sm. [Accepted]
Alismataceae
2 898014 Sagittaria ambigua J.G.Sm.
H.G.A. Engler, Pflanzenr., vol. 15 [Heft 16], (Alismataceae): p. 53, fig. 16 E,F (1903)
898014
Sagittaria ambigua J.G.Sm.
Annual Rep. Missouri Bot. Gard., vol. 6 : t. 17 (1895)