GRIFFITHS—THE GRAMA GRASSES. 405 
On account of the abundance of root leaves and its bunched nature, this is a rather 
good forage grass. It does not appear to be able, however, to compete successfully 
enough with other species to make it of any great importance. The species is common 
on the southern plains and in the Rio Grande region and is rather important in the 
vicinity of San Angelo, Texas. 
Pringle’s no. 9018, distributed as B, bromoides Lag., Nealley 17, Heller 1485, Tracy 
8105, and Reverchon 1135 are representative of the species. 
HERBARIUM SPECIMENS. 
Texas: Drummond 374. Ball 1110, Chillicothe. Wright 75, Dallas. Letterman, 
Dallas, August, 1882. Hall 771, Houston Jealley in 1889; 17, Houston. ever- 
chon 1155, 4215 and 522, Dallas. Heller 1485, Nueces County. Piper, Kingsville. 
Warburton, Terrell. Tracy 8861 and 8889, Corpus Christi; 8878, Kingsville; 8105, 
Abilene. Havard, Eagle Pass. Jermy, San Antonio, Smith, Kerrville and San 
Diego. Bray 329, Llano; 296, Fredericksburg. Bush 244, Houston; 176, 
Columbia. Plank 28, Burnet. 
Mexico: Pringle 9018, Diaz, Coahuila. 
25. Bouteloua lophostachya Griseb. 
Bouteloua lophostachya Griseb. Abh. Ges. Wiss. Gottingen 19: 302. 1879 (Symb. 
Fl. Argent.). The type (Hieronymus’s no, 971 from Argentina) in the Grisebach 
Herbarium, has been examined. 
Bouteloua nana Griseb. Abh. Ges. Wiss. Gdttingen 19: 303. 1879 (Symb. FI. 
Argent.). The type in the Grise- 
bach Herbarium (Hieronymus’sno. 
721, Guazapampa, Argentina) is 
unquestionably a depauperate form 
of B.lophostachya. Bouteloua nana 
is also a younger plant but the 
panicle and the floral and habit 
characteristics are in every respect 
identical with those of Hierony- 
mous 971. © 
DESCRIPTION. 
A cespitose, harsh, rigid peren- 
nial, with freely branching stems 
and short, stout rootstalks; sheaths 
striate, short but completely cov- 
ering the lower internodes; blades 
rigid, divaricate, harsh, keeled, 
sharply cuspidate-pointed, 2 to 4 
cm. long, abundant below but few Fia. 54—Bouteloua lophostachya. a, Spikelet; b,c, lemma 
above; panicle with 15 to 30 spikes and palet of first floret; d-h, rudimentary second, third, 
scattered along the main axis, 5 to fourth, fifth, and sixth florets; i, two views and cross sec- 
I 8, 
. tion of caryopsis. @, Scale 10; b-i, scale 15. From Kurtz 
10 em. long, occasionally 2 or 3 40687, 
spikes together; spikes loosely and 
indistinctly pectinate, 1 to 3 em. long; spikelets 15 to 20, consisting of a lower perfect 
floret, with 2 to 4 rudiments above; glumes very slightly scabrous-keeled and short- 
awned, the first slightly shorter than the second, about 2 mm. long; lemma pubes- 
cent, 3 to 3.5 mm. long, 3-awned, the central awn 2 or more times longer than the 
lateral; palet obovate, 2-nerved, awnless, about 1.5 mm. long; rudiment consisting 
of 4 or even 5 well-developed 3-awned scales resembling the lemma but diminishing 
