967 
lle Elymus Le Wild Ryee. 
Tall perennials with dense tcrminal spikes. Spikelets sessile, 
tvro (sometimes more in i, condensatus) at each node of the continuous 
rachis, the rachilla disarticulating above the &lumes and between the 
florets; glumes equal, lanceolate or subulate, acute or aristates; lemmas 
rounded on the back, avmless or long-avmed, 
O Glumes subulates; lemmas awnless; culms with short 
4 knotty rhizomes 1. Ee condensatus 
OGlumes comparatively broads; lemmas awned (except in 
[3 virginicus var, submuticus), the awns 1-3 om, 
' \long; rhizomes wanting 
& Glumes thin, not indurate at the base Ze be flaucus 
2,Glumes firm, indurate and more or less bowed 
( out at the base 
u 4 Avms erect or wanting Oe “e Virginicus 
4 Avms spreading 4e lve canadensis 
1. E. condensatus Presl. Culms stout in large clumps with short knotty 
rhizomes, erect, about 150 cm, tall; sheaths smooth; blades flat, bik Be 
ascending, scabrous above, nearly smooth beneath, as much as 40 cm, long 
and lc mm, wide; spikes crect, dense, 10-20 cin. long; glumes subulate or 
very narrow, avm-pointed; lemneas sparsely pilose, avmless or shortearistate, 
Ury slopes and sandy river banks, .Near Slackwater, St, Josevhs R,, 
Leiberg 1302. 
Ce te Zlaucus Buckl, -——> Culms slender, as much as 120 cm. tall, smooth 
| 
or scabrous; sheaths smooth to hirsute; leaves flat, rather lax, longe 
acuminate, pointed, scabrous, 10-25 cm, long, 2-10 mm, wide, seldom wider; 
; ee, oe cakat uminat ym=pointe 
qi inflorescence dense, O-15 cm. longs glumes lanccolase, acuminate or avm-poin ed, 
