4 i Rhodora [JANUARY 
SAGITTARIA. 
S. Engelmanniana J. G. Sm. Muddy or peaty soil around ponds 
and wet places. Ponkapog Pond, Canton and Randolph (J. R. 
Churchill, July 19, 1870; G. G. Kennedy, Sept. 3, 1888; C. H. 
Knowlton, Aug. 1, 1908); Milton (4. W. Cheever, Aug. 14, 1905); 
Grassy Pond, Acton (J. R. Churchill, Aug. 4, 1888); Gleason’s Pond 
and small unnamed ponds, Framingham (A. J. Eames, Sept. 5, 1908); 
Long Pond, Tewksbury (Wm. Boott, Aug. 24, 1865); Round or Priest 
Pond, Tewksbury (H. H. Bartlett, Sept. 21, 1905. “Reproduces also 
by long flagelliform stolons with a winter bud at end"). 
S. graminea Michx. Shallow water; scattered stations in northern 
half of district. 
S. heterophylla Pursh. Canal bed, S. Lawrence (4. S. Pease, 
July 9, 1902). 
S. heterophylla Pursh, var. rigida (Pursh) Engelm. Newbury 
(A. A. Eaton, July 28, 1903). 
S. latifolia Willd. Wet places throughout, common. All the forms 
represented in Gray’s Manual have been reported. 
S. subulata (L.) Buchenau, var. (?) gracillima (Wats.) J. G. Sm. 
Paul’s Bridge, Neponset River, Milton; Charles River in Newton, 
Needham and Natick; Waban Brook, Wellesley. “ Concord River” 
(A. W. Hosmer. See Rnopona, i. 224. 1899). 
S. teres Wats. Sandy Pond, Lincoln (4. W. Hosmer. See 
Ruopona, l.c). The only authentic report from north of Cape Cod. 
HYDROCHARITACEAE. 
ELODEA. 
E. canadensis Michx. Quiet water of ponds and streams; North 
Andover, Cambridge, Medford, Wayland; also Charles River near 
Wellesley. 
VALLISNERIA. 
V. spiralis L. Deep still water; scattered stations in northern half 
of district. The earliest record is by Wm. Boott, who collected the 
plant in Mystic Pond, Aug. 26, 1853. 
niae uii 
