Muhlenbergia straminea

Hitchc.
Common names: Screwleaf muhly
Treatment appears in FNA Volume 25. Treatment on page 183.

Plants perennial; cespitose. Culms 25-70 cm, erect, rounded near the base; internodes glabrous. Sheaths glabrous, stiff, becoming flattened, ribbonlike or papery, and conspicuously spirally coiled when old; ligules (6) 10-20 mm, hyaline, acuminate, lacerate; blades 7-25 cm long, 1-4 mm wide, flat to involute, scabrous abaxially, spiculate adaxially. Panicles 8-25 cm long, 0.5-3 cm wide, not dense; primary branches 0.6-8 cm, appressed or diverging up to 30° from the rachises; pedicels 0.2-5 mm, scabrous. Spikelets 3.5-7 mm, yellowish to pale greenish. Glumes (3) 3.5-6 (7) mm, scabridulous, unawned or awn-tipped; lower glumes shorter than the upper glumes, 1-veined; upper glumes equaling or exceeding the florets, 3-veined, acuminate to acute, occasionally 3-toothed, awned, awns to 1.5 mm; lemmas 3.5-5.5 (6) mm, lanceolate, pubescent on the lower 1/2 of the midveins and margins, hairs to 1 mm, apices scabrous, acuminate, awned, awns 12-27 mm, flexuous; paleas 3.5-5.5 mm, lanceolate, pilose between the veins, apices scabridulous, acuminate; anthers 2-3.5 mm, purple. Caryopses 1.9-2 mm, fusiform, light-brown. 2n = unknown.

Discussion

Muhlenbergia straminea grows on rolling, rocky slopes, volcanic tuffs, canyon bottoms, and ridges, usually in open pine forests, at elevations of 1800-2600 m. It is known only from the southwestern United States.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Muhlenbergia straminea"
olivaceous +, yellow +, orange +  and purple +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
scabridulous +
Paul M. Peterson +
Hitchc. +
1 (?) +  and 3 (?) +
flexuous +
multiple +, , +  and single +
curled +
1.2 cm12 mm <br />0.012 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
7 cm70 mm <br />0.07 m <br /> (25 cm250 mm <br />0.25 m <br />) +
pubescent +  and glabrous +
spiculate +
flat +  and involute +
1mm;4mm +
spikelike +
with hairs +  and glabrous +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Screwleaf muhly +
rounded +
25 cm250 mm <br />0.25 m <br /> (70 cm700 mm <br />0.7 m <br />) +
Ariz. +  and N.Mex. +
not waisted +
capillary +
pistillate +  and staminate +
bisexual +  and fertile +
round +  and compressed +
reduced +
shorter or longer +
subtending +
scabridulous +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
uncinate +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
paniculate +  and racemose +
hollow +  and solid +
not absent +
lanceolate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
lacerate +  and acuminate +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
membranous +
inconspicuous +
concealed +  and prominent +
2 +  and 1 +
lanceolate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
8cm +  and 25cm +
cleistogamous +
spikelike +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
dry +  and fleshy +
diverging;appressed +
0.6 cm6 mm <br />0.006 m <br /> (8 cm80 mm <br />0.08 m <br />) +
spikelike +
flattened +
yellowish +  and pale greenish +
1 +  and 60 +
compressed +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Muhlenbergia straminea +
Muhlenbergia +
species +
membranous +
shorter than to longer than the florets +
3-toothed +, acuminate +  and acute +
exceeding the florets +  and equaling +
7 +  and 13 +
stoloniferous +  and rhizomatous +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +