390 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
The species is to be looked upon as a perennial B. barbata, a native of the west 
coast of northern Mexico. The type is Palmer’s Yaqui River specimen of 1869 in 
the National Herbarium. Palmer 751, Alamos, Mexico, 1890 and W. G. Wright 1322 
from the headwaters of Mazatlan River are distinctly stoloniferous, while Hitchcock: 
3552, Guaymas, Mexico, is simply geniculate and a much larger plant than any of 
the others. The same is true of Chase 5509 from near Guaymas. 
15. Bouteloua eriopoda (Torr.) Torr. 
Chondrosium eriopodum Torr. in Emory, Mil. Reconn. 154. 1848. 
Bouteloua eriopoda Torr. U. 8. Rep. Expl. Miss. Pacif. 4: 155. 1856. Based upon 
Chondrosium eriopodum. See also U. 8. Dept. 
Agr. Div. Bot. Bull. 12!: pl. 87. 1890; U.S. 
Dept. Agr. Div. Agrost. Bull. 7: 217. f. 199. 1897. 
Bouteloua brevifolia Buckl. Proc, Acad. Phila. 
1862: 93. 1862. Asa Gray@ reviews Buckley’s 
descriptions and refers this to B. eriopoda Torr. 
and shows that it was based upon Wright’s no. 748 
and Fendler’s no. 950 (not 946 as on ticket in the 
Philadelphia Academy Herbarium). 
DESCRIPTION. 
A cespitose perennial, growing commonly in 
large bunches, separated by intervals of a few 
inches to afew feet of bare ground, or occasionally 
a weedy annual, but seldom in shade of shrubs; 
culms geniculate, rather weak, woolly, 40 to 60 
em. long, commonly branched, and in warmer 
localities sparingly perennial, with close, striate, 
smooth sheaths, small ciliate-fringed ligule, and 
narrow, convolute, smooth blades; panicle race- 
mose, 10 to 15 cm. long; spikes 3 to 8, commonly 
4 or 5, 2 to3 cm. long; spikelets 12 to 20, 7 to 10 
mm. long, loosely pectinate, consisting of one 
lower fertile floret and an upper rudiment; 
glumes very unequal, the first about 3mm., the 
second about 7 mm. long, keeled, smooth, or the 
second minutely scabrous at the apex; lemma 
minutely hairy below, 3-awned, the lateral 
Fig. 44.—Boutelouacriopoda. a,Spikelet; @WNS very short, the central equaling those of 
b,c, lemma and palet of first floret; d, the rudiment, hispid, 2 mm. long; palet awnless, 
Tudiment;e, two views and cross-section aeyminate, about 5mm, long; rudiment consisting 
ofcaryopsis. a, Scale 7.5; b-e, scale 10. ; . os : 
From Griffiths 7002. of 3 equal, hispid awns 4mm. long, united at base 
by very minute scales and supported upon a slen- 
der, smooth stipe 2 mm. long, hairy-tufted at each end; caryopsis cylindrical-oblong, 
2.5 to3 mm. long, 0.25 to 0.35 mm. wide, the scutelum covering three-fourths of the 
ventral surface. (Pate 74, B, facing p. 388. Ficure 44.) 
The lax, pectinate inflorescence and woolly culms readily distinguish this species, 
In publications of the United States Department of Agriculture it has usually been 
called ‘‘woolly-foot” but in portions of the Rio Grande Valley of New Mexico, where 
Cc 
@ Proc. Acad. Phila. 1862: 334. 1863. 
