SAGITTARIA AND LOPHOTOCARPUS. 45 
the flowers opening at the surface of the water or raised 
above it; bracts acuminate; fruiting head larger, 8 mm. in 
diameter ; filaments longer; achenia more numerous, 2 mm. 
long, 5-to 7-crenately crested.— Flowering from August 
to October. In fresh water ponds and brackish tide waters 
along the coast from South Carolina to West Florida. 
Specimens from the coast of Florida have the petioles, 
phyllodia and floating scape much elongated, the latter 
often 8 to 10 dm. long. Figured from a specimen col- 
lected in West Florida by Dr. Leavenworth with both 
the floating leaves ascribed to natans, and the ribbon-like 
phyllodia of Jorata. — Plate 13. 
Specimens examined from ‘Carolina’? (Bernhardi Herbarium); 
“ Southern States’? (Read, 1856; Baldwin); South Carolina (Ravenel, 
Santee Canal); Alabama (Mohr); Florida (Croom, 1835, Quincy; Dr. 
Chapman, 218, Apalachicola, and many specimens without date or 
locality in many herbaria; Dr. Leavenworth, at St. Marks, “‘ where the 
water varies in depth with the tide from 2 to 5 or 6 feet,” and Ft. Duane, 
East Florida; Keeler, Mayport and Jacksonville; and Curtiss, 2747, 1878, 
Jacksonville). 
S. SUBULATA GRACILLIMA (S. Wats.) J. G. Smith, in 
Mem. Torr. Bot. Club, Vol. 5: 26 (1894). WS. natans 
var. (?) gracillima S. Wats. in A. Gray, Man. Ed. 
6, 556 (1890). S. natans Engelm. Bull. Torr. Bot. 
Club, 9: 4 (1882). 
Submerged aquatic; leaves 6 to 12 dm. long, usually 
consisting of narrow flexuous phyllodia 2 mm. wide, 
indistinctly 1-nerved toward the apex, or widening into a 
3-nerved, lanceolate blade 3 to 4 cm. long, 6 to 8mm. wide; 
scape simple, terete or flattened, as long as the leaves, bear- 
ing 2 to 6 verticils; pedicels 3 to 10 cm. long ; only 1 or 2 
flowers appearing at the surface of the water at a time, 15 
to 20 mm. across; inflorescence at length 4 to 5 dm. long ; 
bracts acute, soon evanescent; the immature achenium 
broadly obovate, with a stout oblique beak. The achenia 
ripen under water and mature specimens have not yet been 
collected.— In deep water of streams in Eastern Massa- 
19 
