12, P. foliosus ‘af, Stems flatcened, very leafy, all leaves 
t 
On 
midrib vrominents; snikes few, feweflovcred, subjlobose, 6-8 mn, 
submerged 
1 
and similer, 2-5 em. long, leo-2 ma, wide, flet, linear, 5-5—veined, the 
on vedunclcs subecual in lenpth or longer 3 nutlets 1.5 m, broad, rough, 
the keel winged, the merfcin of the wing uncvene 
yal 
Paradise Ur., !.oscow, -.cnderson 2716. 
in diameter, 
15, Pe filiformis Porse Vare bores.lis (Raf. ) St. John. Stems very slender, 
with nunerous crowded leaves mostly 5-15 cm, long, scarcely .o 
2 
LK 
Ww 
ice] 
se of the blade, the free 
= 
. 4 EN KA es ee a = Ly} 
leveineds; stinules a nate to tne 
portion 5-5 
ae eee 
en, long; seduneles v-ry slender, commonly 4-6 cm. long, the short inverru: 
spike 1+1.5 om. long; stigma sessile; nutlets 2-3 mm, longs, not keelede 
{= 
= 
shallow margin, 
eo 
= 
spling 7775. 
14, P. vectinatus Le Stems very slender, 50-90 cm. long or 
—- 
branched, svresding Lemvise 
we 
—— ee ee 
leveined, thoir stivvles adnate to the base of the blade for a 
more, much& 
leaves linesr,. l-1.5 mm, broad, 8-12 cm, lone 
3 3 os 
bout half 
shoir length, 15-25 mm, long, scarious on the marcins; peduncles very slend 
commonly 5-10 em. lonc, svike interrupved,2-5 cm, long; nutlets 
? 
the beck, 3-4 mm. lonr, obscurely «-kocled. 
Shallow water, Loke Pond Oreille, near love, Sandberg toe 
—- 
rounded on 
e A veriable 
ted 
M 
er, 
eal 
