1916] St» John, — Potamogeton, Section Coleophylli 125 



the sheath: peduncles single, of variable length, bearing 2-5 often 

 widely and unequally spaced whorls of flowers: fruit obliquely obo- 

 vate, greenish or yellowish, 2.5-4 mm. long, 2-3 mm. broad, with a 

 slender incurved style persistent as a beak on the mature fruit. — 

 Widely distributed in brackish, alkaline, or sometimes fresh waters 

 from eastern Newfoundland to British Columbia and southward, also 

 in temperate and tropical regions of the rest of the world. 



Newfoundland: shallow tidal pools in salt marsh, Norris Arm, 

 Valley of Exploits River, Aug. 21, 1911, M. L. Fernald & K. M. 

 Wiegand, no. 4,494 (H); brackish or saline pool, Carboniferous area, 

 Stephen ville Crossing, head of Bay St. George, Aug. 14, 1910, 

 M. L. Fernald & K. M. Wiegand, no. 2,461 (H); brackish pond, Port 

 au Port ("The Gravels"), Aug. 15, 1910, M. L. Fernald, K. M. 

 Wiegand & J. Kittredge Jr., no. 2,402 (H). Quebec: pool in a brack- 

 ish marsh, River Etamamiou, Charnay, Saguenay County, Aug. 28, 

 1915, Harold St. John (C): brackish pool near the mouth of Matane 

 River, Matane, Gaspe County, Aug. 0, 1904, F. F. Forbes (H & C); 

 tidal Hats of the St. John (or Douglastown) River, Gaspe County, 

 Aug. 23, 1904, J. F. Collins, M. L. Fernald & A. S. Pease (H). Mag- 

 dalen Islands: shallow ponds among the sand hills between East 

 Cape and East Point, Coffin Island, Aug. 17, 1912, M. L. Fernald, 

 B. Long & II. St. John, no. (5,790 (H); Hospital Pond, Grindstone 

 Island, July 18, 1912, M. L. Fernald, E. B. Bartram, B. Long & II. 

 St. John, no.^ 0,791 (H): deadwater of stream flowing into pond 

 southwest of Etang du Nord wharf, Grindstone Island, July 25, 1912, 

 M. L. Fernald, E. B. Bartram, B. Long & II. St. John, no. 6,793, (H); 

 shallow water near the margins of brackish ponds southwest of Etang 

 du Nord village, Grindstone Island, Aug. 15, 1912, M. L. Fernald, 

 B. Long & II. St. John, no. 0,794 (H). Prince Edward Island: 

 abundant in a broad band near margin of North Lake, Aug. 24, 1912, 

 M..L. Fernald, B. Long & II. St. John, no. 0,788 (H); Black Pond, 

 July 28, 1912, M. L. Fernald, E. B. Bartram, B. Long & II. St. John, 

 no. 6,787 (H); Lower Sea Cow Pond, Aug. 6, 1912, M. L. Fernald, 

 B. Long & II. St. John, no. (i,789 (H). Nova Scotia: salt pond, 

 Baddeck, ('apt- Breton, 1883, Dr. Burgess (Y); salt ponds, Baddeck, 

 Cape Breton, July 18, 1883, J. Macoun (C no. 4,150); salt marshes, 

 Grand Narrows, Cape Breton, July 27, 1898, J. Macoun (C no. 20,752) ; 

 brackish ponds, Sable Island, Aug. 5, 1900, J. Macoun (C no. 22,072); 

 edge of brackish pond, Sable Island, Aug. 27, 1913, //. St. John, no. 

 1,120 (H). New Briwswick: brackish pools at mouth of Tete-a- 

 Gouche River, Bathurst, July 24, 1902, E. F. Williams & M. L. 

 Fernald (H); cove in St. John River, Ingleside, Westfield, Aug. 7, 

 1909, M. L. Fernald, no. 1,010 (H). Maine: near margin of Beau 

 Lac, Saint Francis River, Aroostook County, Aug. 14, 1902, W. W. 

 Fggleston &• M. L. Fernald (H); brackish pools, Winnegance Creek, 

 Phippsburg, Sagadahoc County, Aug. 23, 1909, M. L. Fernald, no. 

 1,013 (N). New Hampshire: Connecticut River, Hanover, July, 



