SAGITTARIA AND LOPHOTOCARPUS. 33 
sides smooth, or often with a vertical subepidermal resin 
passage. Phyllodia of two forms, either long, slender, 
petiole-like, or flattened, linear-lanceolate, 2 to 5 dm. long 
and 10 to 15 mm. wide.— Along streams or sandy mar- 
gins of lakes and ponds, in the mountains from British 
Columbia to California, Nevada and New Mexico, and from 
western Kansas and Nebraska to Minnesota and Quebec. 
Phyllodial or immature specimens are difficult to dis- 
tinguish from plants of S. latifolia form c of similar 
habit. The species perhaps approaches most closely the 
Northern European and Asiatic S. sagittifolia, from which, 
however, mature specimens are easily separated. The 
achenia are much smaller, and cunate-obovate instead of 
nearly orbicular as in the European species. — Plate 1. 
Specimens examined from British Columbia (Macoun, Kamloops, 1879, 
and 1889, S. variabilis hastata form c, Sicamous, 1889); Washington 
(Dr. Lyall, 1860; Suksdorf, 1318, Sept. 1893, Klickitat Co.); Oregon 
(Kellogg and Harford, 952, 1869; Howell, Sauvies Island, 1887; Nuttall) ; 
California (Bolander, Sierras, 1870; Vasey, 1875; Mrs. Ames, 1876, Plu- 
mas Co.; Mrs. Austin, 1877); Nevada (Stevens, Pac. R. R. Surv.; Torrey, 
506, 1865, Lake Washoe; Bailey, 1151, 1867, Truckee Valley; Palmer, 
1876); Utah (S. Watson, 1151, 1869, Salt Lake Valley; Jones, 1071, Salt 
Lake City, 1879) ; Colorado (Jones, 1878, Denver) ; New Mexico (Wislize- 
nus, 27 and 225, 1846, the latter with irregularly approximate whorls; Fend- 
ler, 837 and 839, 1847; Edwards, 1849, Santa Fé, the “ 8. Mexicana’’ of 
Herb. Torrey but not of Engelmann); Northwest Terr. (Parry; Macoun, 
1751, 1879, Eagle Hills “ 8. variabilis gracilis’’, —— Land Hills, “ 8, 
variabilis hastata form b,—— and 1883,Moose Mountain Creek) ; Manitoba 
(Bourgeau, 1857, Winnipeg Valley); Idaho (Leiberg, 526, 1891, Lake Pend 
d’Oreille, ‘‘in water 3-12 dm. deep, or in simply wet places,” “‘on sand- 
bars, shallow bays and mouths of rivers, abundant,’”? many forms); 
Montana (Notestein, 1893, Great Falls); Geyer, Nicollett’s Northwest 
Expedition, 1839; S. Dakota (Williams, 16, 1892, Big Stone Lake and many 
other localities. Specimens from Big Stone Lake have branched scape 
with whorls irregularly approximate, lobes of leaf linear, much elongated, 
and two kinds of phyllodia on the same plant) ; Nebraska (H. Engelmann, 
Platte Bottoms, 1852, 1856 and 1858, the latter with bracts 25 to 30 mm. 
long; Smith and Pound, 235, 1892, Sand Hills; Bates, Sand Hills); Iowa 
(Hitchcock, 1891); Minnesota (Minneapolis, 1877, ““N. H. W.,’? with 
broadly ovate leaves, submerged scape, the irregularly approximate 
fertile verticils each with 3 to 6 flowers; Bailey, 154, 1886, Vermillion 
Lake; Sandberg, 1179, 1891, Lake Itasca) ; Michigan (Davis, 1890, Alma; 
Kofoid, 1890 and 1891, Cheboygan Co., and “‘ sandy margins of Black 
3 7 
