29. iuhlenbergia Schreb. 
anetimes annuals, with narrow panicles. 
rachilla disarticulating above the glumes; 
she lemma, nearly equal, acute or obtuse, l-nerved; 
Low perennials or sa 
Spikelets l-flowered, the 
glumes shorter than 
Lemmas membranaceous, landediate, 3Zenerved, awnless. 
go Culms finely nodulose-roughened; glumes two-thirds 
4 ren length of the spikelet, usually acute l. Me ant 
: o Culms smooth; glumes not more than half the length 
4 of the spikelet, obtuse 2°, Me filiformis 
1. i.Rbchardsonis(Trin,)%ydb- Perennial; culms wiry, densely tufted, 
and rooting at the nodes, the ends ascending, 
srect, ascending ,o prostrate 
sparingly branchimg, 10-30 cme long 
ligules 1-2 mae long; blades farm, 
1 mme wide; panicles narrow, 
from the base; spikelets short-pediceled, ap use glumes acute or obtuse, 
l-nerved, 15-2 mme long; lemmas 2-3 Mle long, scabrous toward the tipe 
nodulose-roughened; sheaths smooth; 
Plat or rhea scabrous, .5-6 cme long, 
_ Dry or moist banks of streams and lakes. 
2. lve filiformis (Thurbd. ) Rydb. ——yAnnual or perennial; culms erect 
or spreading at the bese, slender, smooth, 2-20 cm. tall; sheaths smooth; 
ligules about 1 im. long; blades scabrous, flat or folded .5-4 mu. long, 
less than 1 mm. wide; paniolés narrow, l= 4 cme long, the branches appressed, 
few flowered; glumes ovate, obtuse, l- ~nerved, 1 mme long; lemmas 2 mn. long, 
tha +4 
scabrous atc the tlpe 
Mioist meadows and ledges. 
2-6 cme long, the branches appressed, floriferous 
