mt 
W 
Dry hills and plains. 
? Odin Bay; Lewistown. 
rmoni (Vasey) Scribn. -——>Culms tufted, erect, mostly 30-40 om. 
He 
as 80 cm.) tall; leaves usually in a basal cluster; sheaths smooth; 
ligules membranaceous, 1-3 mm. long; the blades involute, piabeutis beneath, 
more or less pubescent on the unvpe mrface, 9-20 cm. long, the branches 
appressed; glumes equal, scuminate, 8-10 mm. long; the first O-nerved, the 
second 3-nerved, or sometimes S-nerved, the lateral nerves obscure; Limes 
6 mm. long, sparsely pilose, the ae short and blunt, the ewns 16-20 mm. 
long, twice geniculate, the first two segments twisted, anpressed-pubescent, 
the third straight, scabrous. 
=> 
Dry, rocky soil on mountain surmits, 
no —— lioscow Mts., Henderson 4615. 
4. Se -- columbiana Macoun. ~——>Culms loosely tufted, erect, 30-100 om. tall; 
blades flat or loosely involute, elongate, scaberuvlous or uae iy smooth; ligule 
1-2 mi. long; panicles narrow, rather dense, as much as 20 cm. long, the 
branches appressed, spikelet-bearing from the base; glumes rather firm, 
acuminate, about 1 cm. long; lemma 6-7 mm. long, evenly pubescent, becoming 
brovn at maturity; awns 2-2.5 cm. lone. 
NV 
Open woods, dry vlains, and meadows. 
—— > St. Marieés River; Coeur d'Alene; Wrencoe. 
Oo. S. Williamsii Scribn. ——>Culms erect, 70-90 cm. tall, densely pubescent 
below the nodes; sheaths pubescent; ligules less than .5 mm. long; bledes flat, 
attenuate anc involute toward the end, smooth below, scsbrous and spersely 
pilose ebove, as much as 30 qm. long, 3-4 mm. wide, those of the innovstions 
elongate and usually narrower; panicles narrow, dense, 20-25 cm. long, the 
brenches aporessed; glumes equal, acuminate, S-nerved, & mm. long; lemmas 
about 6 mm. longs, brownish, pilose with appressed white hairs of about egual 
length, the callus sharp pointed, the awn slender, twice-geniculate, loosely 
twisted ts the second bend, 20 mm. lone. 
es 
Drv hills end pleins. ———_— 
—— LF tid (OTe) 
i a 
a 
a 
ee 
os 
ies 
