Fig. 210. <i><b>Ruppia occidentalis</b></i> from the second edition of <i><a href="//commons.wikimedia.org/wiki/Britton_%26_Brown,_Illustrated_Flora,_Second_Edition" title="Britton &amp; Brown, Illustrated Flora, Second Edition">An Illustrated Flora of the Northern United States, Canada and the British Possessions</a></i> (New York, 1913). The currently accepted name for this species is <i><b><a href="//commons.wikimedia.org/wiki/Ruppia_cirrhosa" title="Ruppia cirrhosa">Ruppia cirrhosa</a></b></i> (Petagna) Grande <b>ssp. <i>occidentalis</i></b> (S. Watson) A. Löve &amp; D. Löve
Nathaniel Lord Britton &amp; Addison Brown
1913
An Illustrated Flora of the Northern United States, Canada and the British Possessions, 2nd edition (1913)