Muhlenbergia emersleyi

Vasey
Common names: Bullgrass
Synonyms: Epicampes subpatens
Treatment appears in FNA Volume 25. Treatment on page 185.

Plants perennial; cespitose, not rhizomatous. Culms (50) 80-150 cm, stout, erect, not conspicuously branched; internodes smooth for most of their length, smooth or scabridulous below the nodes. Sheaths shorter or longer than the internodes, glabrous or puberulent, basal sheaths laterally compressed, usually keeled; ligules 10-25 mm, membranous throughout, acuminate, lacerate; blades 20-50 cm long, 2-6 mm wide, flat or folded, scabrous abaxially, smooth or scabridulous adaxially. Panicles 20-45 cm long, 3-15 cm wide, loosely contracted to open, light purplish to light brownish; primary branches 1-17 cm, lax, loosely appressed or diverging up to 70° from the rachises, naked basally; pedicels 0.5-3 mm, smooth or scabridulous. Spikelets 2.2-3.2 mm. Glumes subequal, 2.2-3.2 mm, exceeding the florets, scabridulous to scabrous, faintly 1-veined, acute to obtuse, usually unawned, occasionally awned, awns to 0.2 mm; lemmas 2-3 mm, oblongelliptic, shortly pubescent on the lower 1/2 - 3/4, apices acute, usually awned, sometimes unawned, awns to 15 mm, flexuous, purplish; paleas 1.8-2.9 mm, oblongelliptic, acute; anthers 1.2-1.6 mm, yellowish to purplish. Caryopses 1.3-1.6 mm, fusiform, reddish-brown. 2n = 24, 26, 28, 40, 42, 46, 60, 64.

Discussion

Muhlenbergia emersleyi grows on rocky slopes, gravelly washes, canyons, cliffs, and arroyos, often in soils derived from limestone, at elevations of 1200-2500 m, and is also grown as an ornamental. Its range extends from the southwestern United States through Mexico to Panama.

Muhlenbergia emersleyi differs from the closely related M. longiligula in its compressed-keeled sheaths, pubescent florets, and membranous ligules.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."smooth" is not a number.

... more about "Muhlenbergia emersleyi"
64 +, 60 +, 46 +, 42 +, 40 +, 28 +, 26 +  and 24 +
yellowish +  and purplish +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
1/2 (?) +  and 3/4 (?) +
0 cm0 mm <br />0 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Paul M. Peterson +
1 (?) +  and 3 (?) +
sinuous +, flexuous +  and straight +
1/2 +  and 3/4 +
0 cm0 mm <br />0 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
keeled +  and rounded +
keeled +  and compressed +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
20 cm200 mm <br />0.2 m <br /> (50 cm500 mm <br />0.5 m <br />) +
pubescent +  and glabrous +
scabridulous +  and smooth +
folded +  and flat +
2mm;6mm +
spikelike +
with hairs +  and glabrous +
reddish-brown +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Bullgrass +
geniculate +
80 cm800 mm <br />0.8 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
N.C. +, Ariz. +, N.Mex. +  and Tex. +
not waisted +
capillary +
pistillate +  and staminate +
bisexual +  and fertile +
round +  and compressed +
reduced +
shorter or longer +
subtending +
scabridulous +  and scabrous +
acute +  and obtuse +
subequal +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
uncinate +
paniculate +  and racemose +
hollow +  and solid +
scabridulous +  and smooth +
not absent +
flexuous +
oblongelliptic +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
lacerate +  and acuminate +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
membranous +
inconspicuous +
concealed +  and prominent +
2 +  and 1 +
acute +  and oblongelliptic +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
light purplish +  and light brownish +
20cm +  and 45cm +
cleistogamous +
spikelike +
3 cm30 mm <br />0.03 m <br /> (15 cm150 mm <br />0.15 m <br />) +
scabridulous +  and smooth +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
dry +  and fleshy +
diverging;appressed +
1 cm10 mm <br />0.01 m <br /> (17 cm170 mm <br />0.17 m <br />) +
spikelike +
shorter or longer +
puberulent +  and glabrous +
1 +  and 60 +
compressed +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Epicampes subpatens +
Muhlenbergia emersleyi +
Muhlenbergia +
species +
membranous +
shorter than to longer than the florets +
7 +  and 13 +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +