Muhlenbergia appressa

CO. Goodd.
Common names: Devil's-canyon muhly
Treatment appears in FNA Volume 25. Treatment on page 164.

Plants annual. Culms 10-42 cm, erect or decumbent, much branched below; internodes mostly scabrous, scabrous or hispidulous below the nodes. Sheaths usually shorter than the internodes, flattened below, glabrous, scabridulous or smooth, striate; ligules 1.5-3 mm, hyaline, acute, lacerate, with lateral lobes; blades 1-5 (7) cm long, 0.8-1.6 (2) mm wide, flat or involute, scabrous abaxially, pubescent adaxially. Panicles 4-23 cm long, 0.5-2 cm wide, usually partially included in the subtending sheaths at maturity; primary branches 20-45 mm, ascending, closely appressed; pedicels 1-5 mm, appressed, scabrous; disarticulation above the glumes. Spikelets 4-7.5 mm, borne singly. Glumes 1-2 mm, 1-veined, veins conspicuous, scabrous, and greenish basally, apices obtuse to subacute, often erose; lemmas 4-6.2 (7.5) mm, narrowly lanceolate, terete, mostly smooth, scabrous distally, hairy on the calluses and lower 1/4 of the margins, hairs 0.2-0.3 mm, whitish, lemma bodies not appearing 5-veined, apices acuminate, awned, awns 10-30 mm, straight, scabrous; paleas 3.8-5.7 (7) mm, narrowly lanceolate; anthers 0.3-1.1 mm, purplish. Caryopses 1.6-3 mm, narrowly fusiform, brownish to pinkish. Cleistogamous spikelets usually present in the axils of the lower leaves. 2n = unknown.

Discussion

Muhlenbergia appressa grows in sandy drainages, canyon bottoms, rocky road cuts, and sandy slopes, at elevations of 20-1750 m. Its range extends from Arizona to Baja California, Mexico. It grows in gramma grasslands, oak-juniper woodlands, and chaparral associations.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Muhlenbergia appressa"
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
awned +  and entire +
obtuse +  and subacute +
Paul M. Peterson +
CO. Goodd. +
1 (?) +  and 3 (?) +
straight +
multiple +, , +  and single +
curled +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
involute +  and flat +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
spikelike +
with hairs +  and glabrous +
brownish +  and pinkish +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Devil's-canyon muhly +
decumbent +  and erect +
geniculate +
10 cm100 mm <br />0.1 m <br /> (42 cm420 mm <br />0.42 m <br />) +
Calif. +  and Ariz. +
not waisted +
capillary +
pistillate +  and staminate +
bisexual +  and fertile +
round +  and compressed +
reduced +
shorter or longer +
subtending +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
uncinate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
paniculate +  and racemose +
hollow +  and solid +
hispidulous +  and scabrous +
not absent +
terete +  and lanceolate +
0.4 cm4 mm <br />0.004 m <br /> (0.62 cm6.2 mm <br />0.0062 m <br />) +
lacerate +  and acute +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
membranous +
inconspicuous +
concealed +  and prominent +
2 +  and 1 +
lanceolate +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.57 cm5.7 mm <br />0.0057 m <br />) +
4cm +  and 23cm +
cleistogamous +
spikelike +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
dry +  and fleshy +
2 cm20 mm <br />0.02 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
spikelike +
scabridulous +
flattened +
1 +  and 60 +
compressed +
0.4 cm4 mm <br />0.004 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
1 +  and 3 +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Muhlenbergia appressa +
Muhlenbergia +
species +
membranous +
shorter than to longer than the florets +
conspicuous +
7 (?) +  and 13 (?) +
stoloniferous +  and rhizomatous +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +