: G4) AC. nebraskensis Dewey. ———» Rootstocks creeping and stolon- 
'* iferous, the culms 25-40 om. tall, rether stout, rigid, mostly ‘smooth or 
roughened in the upper part; leaves coarse mostly 5-8 mm 
pale towards the base, the sheaths with thin 
« wide, roughened, 
white margins; staminate 
spikes 1-2, on short stalks, 1.5-2.5 om. long, 4-5 mm, thick; pistiliate 
spikes usually 5-4, cylindrical, sessile or shortly stalked, 1.5-4 am, 
long, 658 mm. thick, mostly approximate, the flowers crowied; lowermost 
chaff 
bract about equal to the culm; scales late, firm 
deep purplish brown except the pale mid » 405 mm. 
ng, tei 
spread at maturity; perigynia 5-3.5 mm. long, broadly oval or even rotund, 
flattened but plump, straw-color, me‘face usually 4-5-veined, the other 
about 7-veined, rounded at the base, abruptly beaked, the beak .3 mm. 
long, 2-toothed. 
q@ Wallace, Epling and Houck 10106. 
Gs} Ce aquatilis Wahl. ————-»>Rootstocks slender, send 
Horizontal stolons, the culms caespitose, commonly 30-50 
slender, sharply angled and smooth, purplish at the base 
flat, 5-5 mn. wide; staminate spikes 1-2, slender, reddi 
about 5 mm. wide; pistillate spikes cylindrical, mostly 
imate, 1-5 om. long, about 5 mm. thick; lowermost bracts 
culns; scales ovate, very blunt or rounded at the apex, 
perigynia, deep purplish brown with Sreen midribs and na 
ing forth long 
CMe tall, 
3 leaf~blades 
sh, 2-3 om. long, 
sessile, approx- 
longer than the 
subequal to the 
rrow papery 
white margins; perigynia 2.5 mm. long, oval, overlapping, flat, dull green, 
usually about 5S-veined on one surface, 7-veined on the other, abruptly 
narrowed at both ends, the beak abait .2 um. long, not toothed. 
Priest River Exp. Sta, 
915 
