SAGITTARIA AND LOPHOTOCARPUS. 55 
S. paprtLosA Buchenau, Abh. Nat. Ver. Bremen, 1: 44 
(1868). S. lancifolia var. papillosa (Buch. ) Micheli, 
in DC. Monog. Phan. 3: 74 (1881). 
Monoecious, slender, erect, 3 to 5 dm. high; leaves 
linear lanceolate, acute, gradually narrowing into the slender 
petiole, 10 to 15 cm. long, 3 to 95 nerved, pseudo-penni- 
nerved toward the base; scape very slender, erect, terete 
or obtusely 3-angled, striate, simple or branching from the 
lowest whorl; bracts obtuse, 3 to 4 mm. long, densely 
granular papillose on the back; fertile pedicels ascending, 
1 to 2 cm. long, the sterile 1.5 to 3 cm. long; sepals ovate, 
obtuse, papillose; flowers 20 to 30 mm. across; stamens 
18, about 3 mm. long, the linear oblong anthers equaled 
or exceeded by the slender glabrous filaments; achenium 
1.5 mm. long, with a tumid dorsal crest and a single 
vertical resin passage on each face; fruiting head globose, 
6 to 10 mm. in diameter. —In shallow ponds, Texas and 
Louisiana. — Plate 25. 
This species was placed by Micheli as a variety of lanct- 
folia, but is more closely related to graminea and perhaps 
ambigua. Fully matured achenia have not as yet been 
collected, or at least are not present in any of the Ameri- 
can herbaria examined. 
Specimens examined from Louisiana (Dr. Hale, Pine Barren, Alex- 
andria); Texas (Drummond, 423; Lindheimer, Houston, 1842, a speci- 
men with the foot of the plant bulbous, covered with the bases of the 
dead leaf sheaths, and 1843, 182; Elihu Hall, 623, 1872, Houston; G. 
C. Nealley, 1884, Beaumont). Lindheimer says of his Houston specimens 
that the successive annual tubers are formed one over another, so that a 
plant often has two or three of the old exhausted ones attached. The 
leaves are sometimes reduced to linear phyllodia which “resemble 
flowerless scapes.”’ 
* * Fertile pedicels thickened or reflexed in fruit. 
+ Achenium obovate; leaves hastate or entire; bracts connate to 
above the middle, glabrous. 
S. PLATYPHYLLA (Engelm.). S. graminea var. platyphylla 
Engelm. in A. Gray, Man. Ed. 5, 494 (1867); J. G. 
Smith in Mem. Torr. Bot. Club, Vol. 5: 25 (1894). 
29 
