MONOECIA TRIANDRIA. 
521 
Simple. Stigma acute. Seed dark brown on a pedicel surrounded at base 
by short hairs or bristles that seem in this genus to perform the functions of 
a perianth. 
Grows in stagnant water, common on the margin of ponds. 
SPARGANIUM. Gen. Pl. 1402. 
Masculi — Amentum 
subrotundum. Calyx 
3-phyllus. Corolla 0. 
Foeminei — Ament- 
um subrotundum. Ca- 
lyx 3-phyllus. Corol- 
la 0. Stigma bifidum, 
vel simplex. Drupa 
exsucca, 1-sperma. 
Male Florets — A- 
ment nearly round. 
Calyx 3-Ieaved. Co- 
rolla 0. 
Female — Ament 
nearly round. Calyx 
3-leaved. Corolla 0. 
Stigma 2-cleft, or sim- 
ple. Drupe dry, one- 
seeded. 
1. American! m.* Nutt. 
S. foliis inferioribus 
caulem subaequantibus, 
basi concavis; culmo 
ramoso; stigmate sim- 
plici, superne attenua- 
te, obliquo, stylum ae- 
quante. E. 
Lower leaves as long 
as the stem, concave at 
base; stem branching; 
stigma simple, tapering 
to the summit, oblique, 
as long as the style. 
Nutt. 2. p. 203. 
S. Simplex, Pursh, 1. p. 24. Sp. pl. 4. p. 199* 
Root perennial, fibrous. Stem eighteen to twenty-four inches high, te- 
rete, flexuous, glabrous, bearing generally two to three branches, heaves 
about as long as the stem, strap-shaped, obtuse, glabrous, thick, concave at 
the base. Heads of flowers globular, sessile. Sterile heads six to nine, fer- 
tile two to three, on the branches not so numerous. Of the sterile floret, 
calyx three-leaved, the leaves obovate, obtuse; filaments twice as long as 
the* calyx; anthers oblong, 2-celled. Of the fertile floret, calyx three-leaved, 
leaves obovate, embracing the germ and base of the style. Style rather 
longer than the calyx. Stigma tapering, rather obtuse, and about as long 
as the style. 
- VOL. IL TT 3 
