Nuphar polysepala Engelm.

subsp. polysepalum (Engelm.) Beçl
TAXONOMIC REVISION OF THE GENUS NUPHAR Sm.
ERNEST O. BEAL HERBARIUM OF THE STATE UNIV. OF IOWA
IOWA CITY, IOWA USA AUG. 19S4
NUPHAR LUTEUM (L.) SIBTH. & SM.
IN FL. GRAEC. PRODR. 1:361.1808 (1809)
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