46 
Boutelowa racemosa. : 
_Common in gravelly soil in the valleys. Often seen on low ridges. 
Bouteloua polystachya. 
Never seen in patches, like most of the other gramas. With its 
short, procumbent stems it prefers situations where there is no 
turf. It is found in a great variety of soils. I saw it in open 
spaces on high prairies and on low prairies and flats ; some- 
times on hill-sides. Several specimens were secn at the Sand 
Hills. It is frequent on the Rio Grande bottom at Presidio. 
Bouteloua aristidoides. 
Often associated with the preceding, but less abundant. Of the 
same manner of growth and choice of habitation. 
Pappophorum Wrightii. 
’ Frequent on many of the mesas and Jow ridges. 
Pappophorum apertum. 
Often seen with the preceding, but a abundant; but it has a 
range farther east than its congen Not rare in valleys be- 
tween Devil’s River and the Wasa 
Cottea pappophoroide. 
Seen in one ice, by the side of Medero Crook ; also in bwo lo- 
calities inthe Chenates ; on a slope at Cibilo anon, and ina 
ravine at the southern base: 
Troidia acuminata. 
This, common east of the Pecos, I saw only in one locality far- 
ther west, at an arroyo near Musquis. 
Triodia albescens. 
Seen in a few places by Toyah Creek. Farther east it is abun- 
dant in several localities. 
Triodia avenacea. 
oe on some of the lower mesas by Medero Creek. A few 
pecimens were seen at a ravine branching from Cibilo Canon. 
Triodia Neate yi, D. 
Seen only ae one i tahoiye on a craggy slope in Cibilo Canon. 
sivpates rast ides 
e phasetiae. 
Triodia euskal 
Seen at many of the arroyos; sometimes on the high prairies. 
A few plants were also seen scattered on the river bottom neat 
Presidio, 
Triodia trinerviglumis. . 4 
ant at Cibilo Cafion. Seen at several points near Toyah 
Creek. 
Triodia repens, n. sp. 
Seen xchiydi in one spot by the side of Limpia Creek (about 15 miles 
north of Fort Davis), just below a rocky slope. Here, 02% — 
level surface a few yards square, it formed a complete turf. 
