34 MISSOURI BOTANICAL GARDEN. 
Lake)’ ; Ontario (Macoun, 1884, Nipigon River, S. variabilis hastata form 
c). An immature specimen from Macoun, 1882, Grand Vallée, Gaspé, S. 
variabilis hastata form c, probably goes here. 
S. ARIFOLIA STRICTA 0. var. 
Slender, erect, 3 to 4 dm. high; blade of leaf 2 to 5 
cm. long; scape simple, erect; bracts ovate, acute, 6 to 8 
mm. long; fertile pedicels 8 to 15 mm. long; fruiting 
head 1 cm. in diameter; achenium smooth or laterally uni- 
costate.— Boggy meadows and slow streams, Falcon Valley, 
Washington, W. N. Suksdorf, 1319 (674), Aug. 1, 1885.— 
Plate 1. 
S. cunnata Sheldon, Bull. Torr. Club, 20: 283, pl. 159, 
(1893). 
Submerged aquatic, rooting in the sand; leaves long 
petioled; blade floating, small, 5 to 8 cm. long, with linear 
lobes; scape simple, slender, terete, 6 to 9 dm. long, bear- 
ing verticils of flowers at the surface of the water; bracts 
ovate-lanceolate, acute, 4 to 6 mm. long; stamens few (?); 
fruiting head small, about 1 cm. in diameter ; achenium 1 
mm.long. Phyllodia of two forms, either linear attenuate, 
petiole-like, reaching nearly to the surface of the water, 
or lanceolate, 6 to 12 cm. long, 4 to 8 mm. wide, clustered 
at the base.— In shallow ponds, or margins of lakes, from 
British Columbia to Minnesota.— Plate 2. 
Specimens examined from British Columbia (Dawson, Aug. 1888, Kam- 
loops; Macoun, 1889, Sicamous); North West Territory (Macoun, 1751, 
1879, Eagle Hills); Washington (Suksdorf, 2262, 1889, Philles Lake, 
Spokane Co.); South Dakota (Williams, 15, 1892, Big Stone Lake) ; 
Minnesota (Sheldon, 3576, East Battle Lake,—39254, Blanche Lake,— 
39264, Mollie Stark Lake, 1892). 
** Achenium obovate, the beak prominent, 4 to 4 as long as the ovary; 
filaments longer than the anthers; basal lobes not more than half the 
length of the leaf; bracts, at least of the lower verticils, free. 
S. uatironia Willd. Sp. Pl. 4: 409 (1806). WS. gracilis 
Pursh, Fl. Am. Sept. 396 (1814). S. simplex Pursh, 
l. ¢., described from staminate scape, and leaf of 
Rumex. 8S. variabilis Engelm. in A. Gray, Man. 461 
8 
