SAGITTARIA AND LOPHOTOCARPUS. 41 
cels about equaling the sterile; leaves small, thin and 
papery in texture; pubescence less dense; achenia about 2 
mm.long. Mature specimens have not yet been collected. — 
Georgia, Florida and Alabama. 
Specimens examined from Georgia (Dr. Wray, Augusta); Alabama 
(C. Mohr, Montgomery and Mobile); Florida (Mary C. Reynolds, 1877, 
St. Augustine). 
S. ENGELMANNIANA n. sp. J. G. Smith in Mem. Torr. Bot. 
Club. Vol. 5: 25 (1894). WS. variabilis var. ( ?) gra- 
cilis S. Wats. in A. Gray, Man. Ed. 6, 555 (1889) 
in part, not Engelm. 
Monoecious, slender, erect or ascending, 2 to 4 dm. 
high, glabrous ; leaves 8 to 20 cm. long, the lobes linear, 1 
to 5 mm. wide, apex rounded or acute, basal lobes acumi- 
nate; scape simple, striate, equaling the leaves; verticils 
4 to 6, the lower fertile; bracts lanceolate, acute, 8 to 
12 mm. long; flowers 2 to 3 cm. wide; petals white, 
rounded, entire, with a very short claw; sepals short, 
ovate, acute; stamens 18 to 25; pistils numerous, the style 
nearly twice as long as the ovary; pedicels slender, ascend- 
ing, the fertile 10 to 14 mm., the sterile 10 to 20 mm. long ; 
achenium narrowly obovate, 4 mm. long, the stout erect 
beak 4 to } the length of the achenium, entire-winged 
on both margins, with 1 to 3 strong lateral wings extend- 
ing downward from the base of the beak on each side; 
fruiting head globose, 12 to 14 mm. in diameter.— Rare, in 
shallow ponds, from Massachusetts to Delaware and 
Florida (?). Dedicated to Dr. George Engelmann, by 
whom it was collected at Lake George, New York, in 
1856.— Plate 9. 
Specimens examined from Florida (?) (Chapman, in Herb. Columbia 
College); Delaware (specimens labeled S. variabilis graminifolia, in 
both the Engelmann and Bernhardi Herbaria); New Jersey (Diffen- 
baugh, 1864, Brown’s Mills, labeled S. variabilis gracilis; Britton, 1889, 
Ocean Co. “ 8. varabilis gracilis’’); New York (E. 8. Miller, Wading R., 
Long Island); Massachusetts (Robbins, Sept. 1864, Uxbridge, the 8. 
variabilis gracilis of many herbaria; Deane, 1888, Hyannis, and Barn- 
stable; Sturtevant, 1890, S. Framingham). 15 
