1920] St. John,— Elodea in New England 21 
B’.Staminate spathe narrowed into a peduncle-like base as long as the 
expanded body, which ends in a gaping mouth, formed by the deeply 
cleft tip and the widely divergent points; staminate flowers pushed 
to the surface of the water by an elongating thread-like pedicel, sepals: 
4-5 mm. long, anthers 2.5-4 mm. long; leaves lance-oblong. 
4. E. Planchonii Caspary. 
1. ELODEA CANADENSIS Michx. Fl. Bor.-Am. i. 20 (1803). An- 
acharis Alsinastrum Bab. Ann. & Mag. Nat. Hist. II. i. 83 (1848), 
and Ann. Sci. Nat. Bot. 3rd ser. xi. 74 (1849). Elodea latifolia Cas- 
pary, Pringsheim's Jahrb. wissen. Bot. i. 467 (1858). 
ILLUSTRATIONS: Ann. Sci. Nat. Bot. 3rd ser. xi. pl. i. (1849); Bot. 
Zeit. xvi. pl. ix (1885); Smith, J. E. & Sowerby: English Bot. Supple- 
ment pl. 2,993 (1865); Coste, H.: Fl. de France iii. 290 (1906); Brit- 
ton & Brown: Ill. Fl. ed. 2, i. fig. 248 (1913). 
DISTRIBUTION: Ponds and streams, especially in calcareous areas 
from Montmorency County, Quebec, south to the mountains of 
Virginia and Kentucky, and westward to southern Saskatchewan. 
QUEBEC: Sainte Anne de Beaupré, Aug. 30, 1905, J. Macoun, no. 
68,806; Sargent's Bay, Lake Memphremagog, Aug. 3, 1903, Churchill; 
Fitch Bay, Lake Memphremagog, Aug. 18, 1906, Churchill; Picka- 
nock River, Aug. 16, 1894, J. Macoun. Vermont: Little Otter Creek, 
Ferrisburg, Aug. 16, 1896, Eggleston & Grout; Lake Bomoseen, West 
Hubbardton, Oct. 3, 1897, Eggleston; shore of Winooski River, Essex 
Junction, July 25, 1911, S. F. Blake, no. 2,210. MASSACHUSETTS: 
Andover, Sept., 1883, Joseph Blake, no. 963 (508); Lake Quanna- 
powitt, Wakefield, W. S. Ripley, Jr., no. 17,494; shallow water, Lake 
Garfield, Monterey, July 12, 1912, R. Hoffmann; Sheffield, Sept. 25, 
1899, R. Hoffmann. RmopEIsLAND: Providence, S. T. Olney. Con- 
NECTICUT: shallow water about Lake Congamond, Aug. 1—5, 1910, 
Eames & Godfrey, Eames, no. 8,457; Lake Saltonstall, Branford, 
Sept. 12, 1914, Blewitt, no. 1,981; shallow water of Housatonic River, 
North Canaan, Sept. 6, 1909, Weatherby, no. 2,700; shallow water of 
brook, Huntington, Sept. 17, 1914, Harger & Weatherby, Weatherby, 
no. 3,604; shallow water of Housatonic River, Huntington, Sept. 17, 
1914, Harger & Weatherby, Weatherby, no. 3,595. New York: still 
water, Dead Creek, Grass River, Canton, July 18, 1914, Phelps,. 
no. 279; western New York, Gray. Ontario: Detroit River, Oct. 16, 
1861, Herb. Boott. Micutecan: Manistee, Aug. 17, 1882, Morong. 
Kentucky: (Lexington, cf. RHopona xv. 120, 1913], Short. ILLINOIS: 
in water 6 dm. deep, Grass Lake, July 28, 1907, F. C. Gates; shallow 
water in a peat-bog lake, Lake Villa, Aug. 8, 1906, Gleason & Shobe, 
no. 182. Minnesota: ponds, Hennepin County, Aug., 1890, Sand- 
berg; Garden Island, Lake of the Woods, June 26, 1894, MacM illan & 
Sheldon, no. 572. SASKATCHEWAN: Souris River, July 29, 1883, 
J. M. Macoun. 
2. E. occidentalis (Pursh) comb. nov. Serpicula occidentalis Pursh, 
excl. syn. E. canadensis Michx., Fl. Am. Sept. i. 33 (1814). Serpicula 
