Plants perennial; densely cespitose, bases hard, knotty, without rhizomes
or stolons. Culms 25-60 cm, numerous, somewhat woody at the base, geniculate,
branching profusely from the lower nodes; nodes usually 4-5; lower internodes
glabrous, without a conspicuous, white, chalky bloom. Ligules 0.1-0.2 mm,
of hairs; blades 2-7 cm long, 1-2 mm wide, mostly flat but the tips involute.
Panicles 1-3(5) cm, with 1-3(4) branches; branches 10-35 mm, persistent,
ascending to widely divergent, becoming arcuate, dark, with 24-45(64) spikelets,
branches terminating in a reduced, needlelike, 2-5 mm spikelet; disarticulation
above the glumes. Spikelets with 1 bisexual floret and 1-2 rudimentary
florets. Glumes acute to acuminate, glabrous or sparsely short-hairy, hairs
not papillose-based; lower glumes 2-2.5 mm; upper glumes 2-3.5 mm;
lowest lemmas 2.5-4 mm, sparsely to densely hairy, 3-awned, awns slightly
shorter than the lemma bodies, central awns flanked by 2 membranous lobes; lowest
paleas about 4.5 mm, mostly glabrous, sometimes puberulent distally, acute
to acuminate, veins not excurrent, unawned; second florets about 4.5 mm,
3-awned, awns 3-5 mm; rachilla internodes subtending second florets with
densely pubescent apices; third florets, if present, flabellate scales,
1-awned. Caryopses 1-1.2 mm long, about 0.4 mm wide. 2n = 40.
Bouteloua ramosa is locally common on rocky limestone slopes and flats
among shrubs and Agave lecheguilla. Its range extends from the Trans Pecos
region of western Texas to adjacent northern Mexico, particularly the state of
Coahuila. Reeder and Reeder (1980) provide an excellent discussion of B. ramosa
and B. breviseta.