Yale University Herbarium

YU.028275

PLANTAE EXSICCATAE GRAYANAE

409. Potamogeton natans L.

Sp. Pl. 126 (1753); Gray, Man. 455 (1848); Morong,  
Mem. Torr. Bot. Club iii. no. 2, 13, pl. 25 (1893) and in  
Britton & Brown, Ill. Fl. i. 66, fig. 142 (1896); Aschers.  
& Graebn. in Engl. Pflanzenr. iv. fam. 11, Heft 31, 42  
(1907); Hagström, Sv. Vet. Akad. Handl. lv. no. 5, 191  
(1916); Fernald, Mem. Am. Acad. xvii. no. 1, 18, pl. 40,  
fig. 7 (1932).

Form with reduced floating leaves and with winter buds.

Tidal water of Robinson Creek, Pembroke, Massachu-
setts.

Coll. M. L. FERNALD, H. K. SVENSON.

October 9 and 18, 1928.