No. 13. 
MUHLENBERGIA NEO-MEXICANA Vasey. 
Plant slender, tufted, perennial, from thick, knotted, or sometimes creeping — 
rootstocks. - 
Culm branching freely below, erect, slender, terete, nearly smooth, 12 to 18 ; 
inches tall. 
Leaves ; of culms 4 to 6; sheaths longer than internodes, close, slightly rough- 
ened; blades erect, appressed, closely involute and setaceous, 2 to 3 inches long; 
livate an irr eiihet ovate, lacerate membrane } line lon 
Inflorescence a narrow, erect or slightly nodding beanld: 3 to 4 inches long, 
often purple; pace alternate, erect, hispid, } to 1 inch long, bearing rather — 
close clusters of spikelets on hispid pedicels 4 to 14 lines long. 
Spikelets narrow, 1-flowered, 2 lines long; empty glumes equal, lance-ov 
acute, carinate, hyaline, isnerved, 1 line long, terminating in a slender awn 41 
line long; floral glume narrowly conical, lanceolate, acute when Guielled: thin, 
smooth, minutely pubescent at base, 3-nerved, terminating in an awn } inch long; 
palet obscurely 2-nerved, 2 lines long, often projecting out of the floral glume 
stamens | 
Grain, none present in the 24 specimens examined. 
PuaTE XIIT; a, panicle at maturity; b, cluster of spikelets; c, spikelet enlarge 
Rocky ledges, New Mexico and Arizona, 
