Bouteloua ramosa

Scribn. ex Vasey
Common names: Chino grama
Treatment appears in FNA Volume 25. Treatment on page 267.

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 segments 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.

Discussion

Bouteloua ratnosa 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.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Bouteloua ramosa"
1 +  and 3 +
J.K. Wipff +
Scribn. ex Vasey +
1 (?) +  and 3 (?) +
well-developed +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
not pseudopetiolate +
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
pubescent +  and glabrous +
usually linear +  and lanceolate occasionally ovate +
1mm;2mm +
chalky +  and white +
conspicuous +
subdigitate +  and digitate +
75 cm750 mm <br />0.75 m <br /> (?) +
persistent +
spikelike +
not woody +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (?) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Chino grama +
ascending +  and erect +
geniculate +
25 cm250 mm <br />0.25 m <br /> (60 cm600 mm <br />0.6 m <br />) +
not waisted +
capillary +
pistillate +  and staminate +
4-lobed +  and trilobed +
sometimes longer +
rudimentary +
round +  and compressed +
reduced +
shorter or longer +
subtending +
short-hairy +  and glabrous +
both +  and 1 +
acute +  and acuminate +
subequal +  and unequal +
not papillose-based +
uncinate +
paniculate +  and racemose +
hollow +  and solid +
not absent +
5-veined +, 7-13-veined +  and 1-3-veined +
sometimes longer +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
membranous +
membranous +
inconspicuous +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
puberulent +  and glabrous +
acute +  and acuminate +
4.5 cm45 mm <br />0.045 m <br /> (?) +
concealed +  and prominent +
4 +  and 5 +
2 +  and 1 +
5 cm50 mm <br />0.05 m <br /> (?) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
dry +  and fleshy +
spikelike +
elongate +
flabellate +
sessile +  and subsessile +
24 +  and 45 +
pectinate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Bouteloua ramosa +
Bouteloua subg. Chondrosum +
species +
membranous +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
not excurrent +
7 +  and 13 +
extended +
rhizomatous +  and stoloniferous +
plant +  and cespitose +
aquatic +  and terrestrial +