158 BULLETIN 772,-U. S. DEPARTMENT OF AGRICULTURE. 
Urachne Trin., Fund. Agrost. 109. 1820. Trinius cites Beauvois’s two figures 
mentioned above, which represent Piptatherum coerulescens and P. punctatum, 
and at the end of his generic deseription lists three species, U. coerulescens 
6 (Milium ecoerulescens Desf.), U. virescens 
W 
f (Milium paradozum Scop.), and U. parviflora 
ny (Agrostis miliacea L.). The first of these is 
=| chosen as the type. 
Wh Fendlera Steud., Syn. Pl. Glum. 13419. 1854. 
a Type, F. rhynchelytroides Steud., the only 
Ww species described. This is the same as Ory- 
copsis. hymenoides. ; 
The commonest species is Oryzopsis 
hymenoides (Roem. and Schult.) 
Ricker, found throughout the region 
west of the Rocky Mountains on dry 
soil. This has an open divaricate pani- 
cle and densely long-silky lemmas. 
The species of Oryzopsis are grazed by 
stock, but usually are not in suffi- 
cient abundance to be of impor- 
tance, except Indian mountain 
rice (O. hymenoides). 
The allied Mexican and South 
American genera, Nasella Desv. 
and Piptochaetium Presl, differ in 
having an obliquely obovate fer- 
tile lemma, the apex gibbous, and 
the awn eccentrically attached. 
76. Strpa L., the spear-grasses. 
Spikelets 1-flowered, disarticu- 
lating above the glumes, the artic- 
ulation oblique, leaving a bearded, 
sharp-pointed callus attached to 
the base of the floret ; glumes mem- 
branaceous, often papery, acute, 
Fic. 91.—Millet grass, Wilium effusum. - Plant, X 33 spikelet and floret, X 5. 
acuminate or even aristate, usually long and narrow; lemma narrow, 
terete, firm or indurate, strongly convolute, terminating in a usually 
bent’ and twisted, prominent, persistent awn; palea inclosed in the 
convolute lemma. 
