Muhlenbergia pungens

Thurb. ex A. Gray
Common names: Sandhill muhly
Endemic
Treatment appears in FNA Volume 25. Treatment on page 173.

Plants perennial; rhizomatous, not cespitose. Culms 10-70 cm, decumbent below; internodes cinereous-lanate, glabrous, or scabrous for most of their length, always cinereous-lanate below the nodes. Sheaths longer than the internodes, cinereous-lanate below, glabrous and smooth or scabridulous distally; ligules 0.2-1 mm, densely ciliate, obtuse, with lateral lobes; blades 2-8 cm long, 1-2.2 mm wide, flat to tightly involute, scabrous abaxially, hirsute adaxially, stiff, pungent. Panicles (7) 8-16 (19) cm long, (2) 4-14 cm wide, open; primary branches 1.5-8 cm, capillary, straight, lower branches diverging 70°-90° from the rachises in mature plants, often appearing fascicled in immature plants; pedicels 10-25 mm. Spikelets 2.6-4.5 mm. Glumes equal, 1.2-3 mm, purplish near the base, smooth or scabridulous distally, 1-veined, acuminate or acute, unawned or awned, awns to 1 mm; lemmas 2.6-4.5 mm, lanceolate, purplish, scabridulous distally and on the margins, apices acuminate, awned, awns 1-1.5 (2) mm, straight; paleas 2.6-4.5 mm, lanceolate, glabrous, acuminate, 2-awned, awns to 1 mm; anthers 1.8-2.6 mm, purplish. Caryopses 1.8-2.5 mm, fusiform, brownish. 2n = 26, 42, 60.

Distribution

Colo., N.Mex., Tex., Utah, Nebr., S.Dak., Ariz., Wyo.

Discussion

Muhlenbergia pungens grows in loose sandy soils near sand dunes to sandy clay loam slopes and flats in desert shrub and open woodlands, at elevations of 600-2500 m. It is known only from the western and central contiguous United States.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."scabrous" is not a number. "glabrous" is not a number.

... more about "Muhlenbergia pungens"
60 +, 42 +  and 26 +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
Paul M. Peterson +
Thurb. ex A. Gray +
1 (?) +  and 3 (?) +
2 cm20 mm <br />0.02 m <br /> (?) +
straight +
multiple +, , +  and single +
curled +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 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 /> (8 cm80 mm <br />0.08 m <br />) +
flat +  and tightly involute +
1mm;2.2mm +
spikelike +
with hairs +  and glabrous +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Sandhill muhly +
geniculate +
10 cm100 mm <br />0.1 m <br /> (70 cm700 mm <br />0.7 m <br />) +
Colo. +, N.Mex. +, Tex. +, Utah +, Nebr. +, S.Dak. +, Ariz. +  and Wyo. +
not waisted +
capillary +
pistillate +  and staminate +
bisexual +  and fertile +
round +  and compressed +
reduced +
shorter or longer +
subtending +
scabridulous +  and smooth +
acute +  and acuminate +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
uncinate +
paniculate +  and racemose +
hollow +  and solid +
cinereous-lanate +, scabrous +  and glabrous +
not absent +
scabridulous +
lanceolate +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
inconspicuous +
concealed +  and prominent +
2 +  and 1 +
acuminate +  and lanceolate +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
8cm +  and 16cm +
cleistogamous +
spikelike +
4 cm40 mm <br />0.04 m <br /> (14 cm140 mm <br />0.14 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
dry +  and fleshy +
immature +  and mature +
1.5 cm15 mm <br />0.015 m <br /> (8 cm80 mm <br />0.08 m <br />) +
spikelike +
glabrous +  and cinereous-lanate +
scabridulous +  and smooth +
1 +  and 60 +
compressed +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Muhlenbergia pungens +
Muhlenbergia +
species +
membranous +
shorter than to longer than the florets +
7 +  and 13 +
plant +  and not cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +