1922] 



PFEIFFER — MONOGRAPH OF THE ISOETACEAE 193 



Specimens examined: 



Newfoundland: in shallow water of sandy pond, Torbay, 1901, 



Howe & Lang 1424 (N. Y. Bot. Gard. Herb, and Gray 

 Herb.) ; YVhitbourne, 8 August, 1911, Femald & Wiegand 

 4409 (Gray Herb.). 



Quebec: in 2-6 dm. w r ater, rooting in close-packed granite gravel, 



Lac des Aniericains, alt. 675 m., western base of Table-Top, 

 Mt. Gaspe, 1-2 August, 1906, Femald & Collins 155 (Mo. 

 Bot. Gard. Herb., Gray Herb., and Univ. Minn. Herb.) ; al- 

 pine lakes, alt. 900-1000 m., Lac Fortin, Table-Top, Mt. 

 Gaspe Co., 10 August, 1906, Femald & Collins 319 (Gray 

 Herb.); Lac 43, Mt. Gaspe Co., 4 August, 1906, Femald & 

 Collins 317 (Gray Herb.). 



Nova Scotia: in shallow water, sandy soil, lake, North Sydney, 



Cape Breton, 1901, Howe & Lang 763 (N. Y. Bot. Gard. 

 Herb.); Warren Lake, Cape Breton Isl., 15 August, 1914, 

 Nichols 877 (Gray Herb.); cobbly margins of east branch 

 of Tusket River, Gavelton, Yarmouth Co., 4 September, 

 1920, Femald, Long & Linder 19625 (Mo. Bot. Gard. Herb). 



Maine: brook flowing into north end of Jordan's Pond, Mt. 



Desert I., 22 July, 1889, Redjield 2726 (Mo. Bot. Gard. 



Herb.); under water, Somes Stream, Mt. Desert 

 27 July, 1892, Rand (Mo. Bot. Gard. Herb.); Deer 

 Brook Beach, Jordan Pond, 23 August, 18!>2, Rand 

 (Mo. Bot Gard. Herb.); south shore of Jordan Pond, 

 10 September, 1894, Rand 3 (Mo. Bot. Gard. Herb.); in 

 shallow water where a cold spring enters the pond, North- 

 west Pond, north Franklin Co., 14 July, 1895, Coville 83 

 (N. Y. Bot. Gard. Herb, and U. S. Nat. Herb.); in 2 ft. 

 water, gravelly bottom, Kennebago Lake, 5 mi. north of 

 Rangeley, 12 July, 1895, Coville 78 (N. Y. Bot. Gard. Herb, 

 and U. S. Nat. Herb.) ; Penobscot River, Orono, September, 

 1895, F. L. Harvey 1 (N. Y. Bot. Gard. Herb.); Bubble 

 Pond, Mt. Desert I., 11 September, 1895, Rand 2 (Mo. Bot. 

 Gard. Herb.) ; Pushaw Pond, Oldtown, August, 1895, Har- 

 vey 2 (N. Y. Bot. Gard. Herb.) ; Pushaw Pond, 21 August, 

 1899, F. L. Harvey (U. S. Nat. Herb, and Mo. Bot. Gard. 

 Herb.); Pushaw Pond, Oldtown, 21 August, 1899, L. H. 

 Harvey 14U (U. S. Nat. Herb.); rocky shore, "Lake 

 Cowles," Mt. Ktaadn, 15-30 August, 11)02, Cowles & Harvey 



