MONOECIA TRIANDRIA. 
689 
perioribus ovalibus, ar- 
gute serratis; floribus 
6-audris. 
per oval, acutely ser- 
rate; flowers hexan- 
drous. 
Mich. 2. p. 191. Sp. pi. 4. p. 408. Prush, 1. p. 274. Nutt. 2. p. 211. 
Potamogeton Verticillat.um, Walt. p. 90. 
Stem 1 — 2 feet high, terete, glabrous, floating, radicant, occasionally 
-branching. Lower submersed leaves numerous, verticillate, setaceous, ra- 
ther more than an inch long, pinnate with the segments also setaceous; the 
upper leaves lanceolate, sessile, acutely serrate, somewhat irregularly verti- 
cillate. Flowers in irregular whorls sitting in the axils of the lanceolate 
leaves, the upper sterile. Calyx and Corolla small, somewhat persistent. 
Stamens rather longer than the corolla. Germs 4. Capsules united, rib- 
bed, as in the preceding, along the back. 
Grows in pine barren ponds. 
Flowers May—July. 
SAGITTARIA. 
Gen. Pl. 1441. 
Masculi. Calyx 5- 
phyllus. Corolla 3- 
petala. Filamenta plu- 
rima. 
Foeminei. Calyx 3- 
phyllus. Corolla 3- 
petala. Germina plu- 
rima. Semina multa, 
nuda. 
Ster ile flore ts. Ca- 
lyx 3-leaved. Corolla 
3-petalled. Filaments 
numerous. 
Fertile florets. Ca- 
lyx 3-leaved. Corolla 
3-petalled. Germs nu- 
merous. Seed many, 
naked. 
1. Sagittifolia, var. Latifolia. 
S. foil is ovatis, sub 
acutis, sagittatis, lobis 
ovatis, acuminatis, rec- 
tis; scapo simplici, flo- 
ribus monoicis; brac- 
teis ovatis, acutis. 
Leaves ovate, gene- 
rally acute, sagittate, 
lobes ovate, acuminate, 
straight; scape simple; 
flowers monoecious; 
bracteas ovate, acute. 
Mich. 2. p. 189. Walt. p. 283. Nutt. 2. p. 213. 
S. Latifolia, Sp. pl, 4. p. 409 Ptirsh, 2. p. 396- 
