SAGITTARIA AND LOPHOTOCARPUS. 51 
long; stamens about 18; anthers exceeding or equaling 
the filaments ; achenium 1.5 mm. long, dorsally crested and 
obliquely unicostate or winged on the sides, with or without 
subepidermal resin passages; fruiting head small, 5 to 10 
mm. in diameter. Phyllodia, when present, flattened, 
linear lanceolate, acute, 8 to 30 cm. long, 1 to 2 cm. wide. 
Plants producing winter tubers and growing in tufts at the 
nodes of horizontal stolons.— In shallow ponds and marshes, 
or slowly running streams, or in simply muddy places. 
From New Foundland westward to the Missouri river, and 
south to Florida and Texas. In the southern portion of its 
range it passes into the next variety. — Plate 19. 
Specimens examined from Canada (Michaux; Macoun, 1883, Cape 
Breton; Britton and Timmerman, 1889, L. Muskoka); New Brunswick 
(Macoun, Little Tobique River, 1884); New Hampshire (Deane, 1884, 
Shelburne); Massachusetts (Robbins, Uxbridge, 1865 and 1866; A. Gray, 
Newburyport, 1866; G. E. Stone, Worcester); New York (Dr. Sartwell, 
Penn Yan; A. H. Curtiss, Lake Oneida; J. A. Paine, Herkimer Co., 
1854; Ward, South Bend, 1879; Vasey, Lake George, 1882; Morong, New 
York City, 1891); New Jersey (Durand; Bergen, 1845; Britton, Branch- 
ville, 1886); Delaware (Tatnall, 1860; Durand; Brinton, Townsend, 
1890; James, 1867); Pennsylvania (Moser, Bethlehem, 1832; Wolle, 
Bethlehem, 1856; Porter, Harrisburg, 1863; James, Philadelphia, 
1861 and 1867); West Virginia (Millspaugh, Hinton, 1891); Michi- 
gan (Dr. Bigelow, Detroit, 1865); Ontario (Macoun, Petersboro 
Co., 1878); N. W. Terr. (Macoun, 208, Eagle Hills, 1879); South 
Dakota (Williams, Big Stone Lake, 1892); Iowa (Hitchcock, Consforth, 
1890); Nebraska (Swezey, 136, Hardy; Rydberg, Mead, 1890; Smith, 
Lincoln, 1890; Bates, Holt Cr., 1892); Kansas (Oyster, Paola, 1891); 
Missouri (Engelmann, many dates and collections, 1832 to 1880,— speci- 
mens collected at St. Louis in 1857 have the leaves truncate or divari- 
cately hastate lobed at the base; Eggert, St. Louis, 1875; Pammel, 
Valley Park, 1886; Bush, Courtney, 1891; Jackson Co., 1892); Illinois 
(Engelmann, many dates and collections from 1832 to 1880; Meyer, East 
St. Louis, 1838; Vasey, Ringwood; E. Hall, Athens, 1861; Eggert, St. 
Clair, 1875; S. Watson, Quincy, 1885; Hitchcock, Fish Lake, 1890); Ken- 
tucky (Dr. Short, Lexington, 1835 and 1840), North Carolina (Schweinitz) ; 
South Carolina (Ravenel, Santee Canal); Georgia (Curtis, Atlanta 
1850); Alabama (Mohr, Mobile, 1883, 1884); Southern States (Dr. 
Leavenworth; Dr. Walsh) ; Florida (Alden, Ft. King; Harding, Baker Co. 
1887; Hulst, DeLand, 1891); Louisiana (Carpenter, 1839; Hale); Texas 
(Lindheimer, West of the Brazos, 1839, and 183, 1843 at Houston, S. 
stolonifera Engelm. and Gray, plants with linear lanceolate, acute acu- 
minate phyllodia 1 cm. wide, 3 to 4 dm. long; Bigelow, San Bois, 1853; 
25 
