$modus 0: smartphone
$modus 1: smartphone
Potamogeton richardsonii
Potamogeton richardsonii (A.Benn.) Rydb. [Accepted]
Potamogetonaceae Potamogetonoideae
58 832756 Potamogeton richardsonii (A.Benn.) Rydb. [107 832668 Potamogeton perfoliatus var. richardsonii A.Benn.]
H.G.A. Engler, Pflanzenr., vol. 11 [Heft 31], (Potamogetonaceae): p. 93, fig. 21 H (1907)