492 MISSOURI BOTANICAL GARDEN. 
S. Lonerrostra (Micheli) J. G. Smith in Mem. Torr. Bot. 
Club, Vol. 5: 26 (1894). WS. sagittifolia var. (?) 
longirostra Micheli, in DC. Monog. Phan. 3: 69 (1881). 
Monoecious, erect, 4 to 8 dm. high; leaves ample, 
smooth, 10 to 25 cm. long, middle lobe broadly ovate- 
rounded, abruptly acute; basal lobes ovate, acute; scape 
simple, exceeding the leaves, 6-angled below, 6 channeled 
above in fruit, and minutely scabrous on the angles; bracts 
15 to 30 mm. long, triangular, acuminate; fertile pedicels 
ascending, 1 cm. long or less; pistils numerous, the curved 
style about twice the length of the ovary; achenium 4 mm. 
long, broadly obovate with a stout erect recurving beak, 
broadly winged on both margins, the ventral entire, the 
dorsal irregularly crenate, a single broken wing or crest on 
each face; fruiting head depressed globose, 12 to 18 mm. 
in diameter, subsessile. — Margins of ponds, from south- 
eastern Pennsylvania and New Jersey to Alabama. This 
is the S. variabilis echinocephala of the Engelmann Her- 
barium.—Plate 10. 
Specimens examined from Pennsylvania: (Wm. M. Canby, Aug. 1863, 
Delaware Co., and Oct. 1863, Chester Co.; T. P. James, 1848, West 
Philadelphia); New Jersey (James, 1848, near Camden); Delaware 
(Canby); Kentucky (Kearney, 187, Aug. 1893, Harlan County); Ala- 
bama (Drummond, a few flowers in the Engelmann Herbarium from the 
type specimen of the Kew herbarium). 
* * * Achenium quadrate obovate, almost beakless; filaments longer 
than the anthers; basal lobes more than half the length of the leaf; 
bracts slightly connate. 
S. tonartospa Engelm. in Torr. Bot. Mex. Bound. Surv. 
212 (1858). WS. sagittifolia var. Mexicana Mart. and 
Gal., Bull. Acad. Roy. Brux. 9: 379 (1842), not S. 
Mexicana Steud. 
Monoecious, slender, erect, 3 to 5 dm. high; leaves 10 
to 18 cm. long, the linear-lanceolate, tapering, acuminate 
basal lobes 2 to 3 times as long as the acute, linear to ovate- 
lanceolate middle one; scape simple or rarely branched ; 
verticils 4 to 8, 1 to 3 lower ones fertile; bracts lanceolate, 
acuminate, 6 to 8 mm. long; fertile pedicels slender, diva- 
16 
