394 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
HERBARIUM SPECIMENS. 
Arizona: Hitchcock 3685, Patagonia; 3480, Tucson; 3733, Benson. Griffiths 1556, 
Fort Lowell; 3361, near Tucson; 3402, Santa Rita Forest Reserve; 1785, Rincon 
Mountains. Mearns 1026, 1064, and 856}, south of Bisbee. Grigiths & Thornber 
199 and 9, Santa Rita Mountains. Purpus 94, Antelope. Pringle in 1884 near 
Mexican Boundary. Rothrock 691, Sonoyta Valley; 347, Cottonwood. Nealley, 
Tanque Verde. Wileox, Fort Huachuca. Jones 4014, Flagstaff. Lemmon 429, 
430. Toumey 807, and 512, Tucson. 
Urau: Jones, Moab. 
Mexico: Hitchcock 3583 and 3536, Hermosillo; 3523, Llano. Palmer 235, 166, and 
204, Guaymas; 791, Agiabampo; 1543, Culiacan; 1761, Ymala. Brandegee, 
Culiacan. 
17. Bouteloua karwinskii (Fourn.), 
Chondrosium karwinskti Fourn, Mex. Pl. 2: 137.1881. The type is Karwinski 1479 
from ‘‘Cafion de las Minas et Victoria,’ Mexico. This number was not found in the 
Paris Herbarium. My interpretation is 
based upon a panicle and two leaves of this 
number from the herbarium of the St. 
Petersburg Botanical Garden. Hemsley @ 
lists this as one of Fournier’s unidentified 
species, but gives the range as extending 
from Texas to South Mexico and a specific 
locality as La Miquiguana. I have seen 
no collections of the species except as noted 
below and can not say anything about 
the basal portion of the type plant nor 
its duplicates, having seen only a panicle 
and some leaves. These, however, agree so 
well with recent collections that I have 
no hesitancy in, referring them here. 
DESCRIPTION, 
An erect, cespitose, gray-glaucous, rigid 
perennial, with stout, short, rhizomatous 
Fic. 47.—Bouteloua karwinskii, a, Spikelets b, ¢, base; culms simple, erect, 20 to 30cm. high ; 
lemma and palet of first floret; d, e,rudimen- Sheaths striate, smooth, close, the ligule 
tary lemma and palet of second floret; f,rudi- reduced to a few long, white hairs; blades 
ment of third floret. a, Scale 6.66-+; b/,scale narrow, mostly basal, variable, about 7 em. 
Morb Karwinski 1479, in St. Petersburg ong and 1 to 1.5 mm. wide; panicle race- 
mose, about 10 cm, long; spikes 12 to 14 
mm. long and 5 or 6 in number; spikelets pectinate on a flattened, short, hairy, 
zigzag rachis, consisting of a lower perfect and an upper three- awned rudiment, 
with scales and awns arising from a naked stipe about 1 mm. long; glumes smooth, 
the second about 2 mm, long, the first a little shorter, ac uminate, scarcely awned; 
lemma 2 to 2.5 mm. long, pubescent, with 3 equal awns; palet about the length 
of its lemma, with 2 very short awns, plicate; caryopsis not seen. (PLATE 76. 
Figure 47.) 
@ Biol. Centr. Amer. Bot. 3: 564. 1885. 
EXPLANATION OF PLATE 76.—Natural habitat of Bouteloua karwinskii, B. trinii, and B. stolonifera 
among vegetation consisting largely of Cereus, Opuntia, Jatropha, etc., east of San Luis Potosi, Mexico. 
