Muhlenbergia spiciformis

Trin.
Common names: Longawn muhly
Synonyms: Muhlenbergia parviglumis
Treatment appears in FNA Volume 25. Treatment on page 169.

Plants perennial; cespitose, not rhizomatous. Culms 25-80 cm, erect, wiry; internodes mostly glabrous, strigose or glabrous below the nodes. Sheaths scabridulous, not becoming spirally coiled when old; ligules 1-3 mm, membranous, acuminate, deeply lacerate; blades 2-12 cm long, 1-3 mm wide, flat to involute, scabridulous abaxially, hirtellous or scabrous adaxially. Panicles 4-18 (20) cm long, 0.2-2.8 cm wide, contracted, not dense, sometimes interrupted below; panicle branches 0.6-5 cm, appressed or diverging up to 30° from the rachises, spikelet-bearing to the base; pedicels 0.1-3 mm. Spikelets 3-4 mm. Glumes unequal, 0.3-1 mm, shorter than the florets, 1-veined, unawned; lower glumes shorter than the upper glumes, obtuse to acute, sometimes erose; lemmas 2.8-4 mm, narrowly lanceolate, purplish, scabrous, sparsely appressed-pubescent on the calluses and lower 1/4 of the midveins and margins, hairs shorter than 0.3 mm, apices acuminate, awned, awns (10) 20-40 mm; paleas 2.6-3.9 mm, narrowly lanceolate, intercostal region sparsely pubescent on the basal 1/3, apices acuminate, scabrous; anthers 0.9-1.6 mm, purplish. Caryopses 2-2.6 mm, fusiform, brownish. 2n = 40.

Discussion

Muhlenbergia spiciformis grows on rocky slopes, cliffs, and calcareous rock outcrops, often in thorn-scrub and open woodland communities. Its elevational range is 450-2800 m; its geographic range extends from the southwestern United States to northern Mexico.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Muhlenbergia spiciformis"
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
Paul M. Peterson +
1 (?) +  and 3 (?) +
10 cm100 mm <br />0.1 m <br /> (?) +
sinuous +, flexuous +  and straight +
multiple +, , +  and single +
curled +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
2 cm20 mm <br />0.02 m <br /> (12 cm120 mm <br />0.12 m <br />) +
scabrous +  and hirtellous +
scabridulous +
flat +  and involute +
1mm;3mm +
spikelike +
with hairs +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Longawn muhly +
geniculate +
25 cm250 mm <br />0.25 m <br /> (80 cm800 mm <br />0.8 m <br />) +
N.Mex. +  and Tex. +
not waisted +
capillary +
pistillate +  and staminate +
bisexual +  and fertile +
round +  and compressed +
reduced +
shorter or longer +
subtending +
unequal +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
uncinate +
0.3 cm3 mm <br />0.003 m <br /> (?) +
paniculate +  and racemose +
hollow +  and solid +
glabrous +  and strigose +
not absent +
appressed-pubescent +
lanceolate +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
lacerate +  and acuminate +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
membranous +
inconspicuous +
obtuse +  and acute +
concealed +  and prominent +
2 +  and 1 +
lanceolate +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.39 cm3.9 mm <br />0.0039 m <br />) +
diverging +  and appressed +
0.6 cm6 mm <br />0.006 m <br /> (5 cm50 mm <br />0.05 m <br />) +
4cm +  and 18cm +
cleistogamous +
spikelike +
0.2 cm2 mm <br />0.002 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 +
spikelike +
scabridulous +
1 +  and 60 +
compressed +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Muhlenbergia parviglumis +
Muhlenbergia spiciformis +
Muhlenbergia +
species +
membranous +
shorter than to longer than the florets +
7 +  and 13 +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +