Muhlenbergia pauciflora

Buckley
Common names: New mexican muhly
Synonyms: Muhlenbergia neomexicana
Treatment appears in FNA Volume 25. Treatment on page 167.

Plants perennial; tightly cespitose, sometimes rhizomatous. Culms 30-70 cm tall, 0.7-1 mm thick, erect, geniculate and rooting at the lower nodes; internodes mostly glabrous, sometimes glaucous, often striate below the nodes. Sheaths usually shorter than the internodes, smooth or scabridulous, usually with dark-brown necrotic spots, flat and spreading at maturity; ligules 1-2.5 (5) mm, membranous, obtuse, with lateral lobes 1.5-3 mm longer than the central portion; blades (1) 5-12 (15) cm long, 0.5-1.5 mm wide, flat to involute, glabrous and smooth abaxially, scabridulous adaxially, often with dark-brown necrotic spots. Panicles (2) 5-15 cm long, 0.5-2.8 cm wide, contracted, interrupted below; primary branches 0.5-4 (6) cm, appressed or diverging up to 30° from the rachises, spikelet-bearing to the base; pedicels 0.1-3 mm, scabrous. Spikelets 3.5-5.5 mm, occasionally with 2 florets. Glumes equal, 1.5-3.5 mm, shorter than the lemmas, 1-veined, acuminate to acute, often erose, unawned or awned, awns to 2.2 mm; lemmas 3-5.5 mm, lanceolate, often purplish, mostly glabrous, calluses with a few short hairs, apices acuminate, scabridulous, awned, awns (5) 7-25 mm, flexuous; paleas 3-5.5 mm, lanceolate, glabrous, acuminate; anthers 1.5-2.1 mm, yellowish or purplish. Caryopses 2-2.5 mm, fusiform, brownish. 2n = unknown.

Distribution

Colo., N.Mex., Tex., Utah, Calif., Ariz.

Discussion

Muhlenbergia pauciflora grows in open or closed forests on rocky slopes, cliffs, canyons, and rock outcrops of granitic or calcareous origin, at elevations of 1200-2500 m. Its range extends from the southwestern United States to central Mexico.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Muhlenbergia pauciflora"
purplish +  and yellowish +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
scabridulous +
acuminate +
Paul M. Peterson +
Buckley +
1 (?) +  and 3 (?) +
5 cm50 mm <br />0.05 m <br /> (?) +
flexuous +
multiple +, , +  and single +
curled +
0.7 cm7 mm <br />0.007 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
5 cm50 mm <br />0.05 m <br /> (12 cm120 mm <br />0.12 m <br />) +
scabridulous +
flat +  and involute +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
spikelike +
with hairs +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
New mexican muhly +
30 cm300 mm <br />0.3 m <br /> (70 cm700 mm <br />0.7 m <br />) +
geniculate +
2 cm20 mm <br />0.02 m <br /> (300 cm3,000 mm <br />3 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Colo. +, N.Mex. +, Tex. +, Utah +, Calif. +  and Ariz. +
not waisted +
capillary +
pistillate +  and staminate +
bisexual +  and fertile +
round +  and compressed +
reduced +
shorter or longer +
subtending +
acuminate +  and acute +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
uncinate +
paniculate +  and racemose +
hollow +  and solid +
glaucous +  and glabrous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
not absent +
lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
membranous +
inconspicuous +
concealed +  and prominent +
2 +  and 1 +
acuminate +  and lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
5cm +  and 15cm +
cleistogamous +
spikelike +
0.5 cm5 mm <br />0.005 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
dry +  and fleshy +
6 cm60 mm <br />0.06 m <br /> (?) +
diverging;appressed +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
spikelike +
scabridulous +  and smooth +
1 +  and 60 +
compressed +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
dark-brown +
1 +  and 3 +
compound +  and simple +
2 (?) +  and 3 (?) +
Muhlenbergia neomexicana +
Muhlenbergia pauciflora +
Muhlenbergia +
species +
membranous +
shorter than to longer than the florets +
7 (?) +  and 13 (?) +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +