Muhlenbergia sericea

(Michx.) P.M. Peterson
Common names: Dune hairgrass Purple muhly
Synonyms: Muhlenbergia filipes
Treatment appears in FNA Volume 25. Treatment on page 188.

Plants perennial; cespitose, not rhizomatous. Culms 70-140 (160) cm, erect from the base, not conspicuously branched; internodes mostly glabrous, sometimes puberulent below the nodes. Sheaths glabrous or puberulent, sheaths rounded near the base, rarely becoming fibrous at maturity, not becoming spirally coiled when old; ligules 4-8 (10) mm, membranous, firm, strongly decurrent, obtuse; blades 35-100 cm long, 1-3 mm wide, usually involute, smooth abaxially, scabrous adaxially. Panicles 20-60 (70) cm long, 15-30 (40) cm wide, longer than wide, diffuse; primary branches 2-20 cm, capillary, diverging 30-100° from the rachises, naked basally, lower branches with 5-20 spikelets; pedicels 4-50 mm, longer than the spikelets, capillary, divergent, stiff or flexible. Spikelets 3-5 mm, mostly purplish. Glumes subequal, (0.3) 1-2 mm (excluding the awns), less than 1/2 as long as the lemmas, glabrous; lower glumes 1-veined, awned, awns 0.5-10 mm; upper glumes 1-veined (rarely 3-veined), acute to acuminate, often erose, awned, awns 2-25 mm; lemmas 3-5 mm, lanceolate, calluses shortly pubescent, apices acuminate, with 2 setaceous teeth, teeth 1-5 mm, awned from between the teeth, awns 8-35 mm, clearly demarcated from the lemma bodies; paleas 2-4.5 mm, lanceolate, acuminate, veins usually extending into awns to 2 mm; anthers 1.5-2 mm, purple. Caryopses 2-2.5 mm, narrowly elliptic, brownish. 2n = unknown.

Discussion

Muhlenbergia sericea grows in sandy maritime habitats on the barrier islands and in coastal woodlands of the southeastern United States, at elevations of 0-50 m. It is available as an ornamental, sometimes under the name 'Purple Muhly'.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Muhlenbergia sericea"
olivaceous +, yellow +, orange +  and purple +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
awned +  and entire +
Paul M. Peterson +
(Michx.) P.M. Peterson +
1 (?) +  and 3 (?) +
sinuous +, flexuous +  and straight +
multiple +, , +  and single +
curled +
0.8 cm8 mm <br />0.008 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
35 cm350 mm <br />0.35 m <br /> (100 cm1,000 mm <br />1 m <br />) +
pubescent +  and glabrous +
involute +, folded +  and flat +
1mm;3mm +
spikelike +
compressed +, elliptic +, fusiform +  and elongate +
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 +
Dune hairgrass +  and Purple muhly +
geniculate +
70 cm700 mm <br />0.7 m <br /> (140 cm1,400 mm <br />1.4 m <br />) +
Conn. +, N.J. +, N.Y. +, Wash. +, Va. +, W.Va. +, Del. +, D.C +, Wis. +, N.Dak. +, S.Dak. +, Ariz. +, N.Mex. +, Pacific Islands (Hawaii) +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Fla. +, Wyo. +, Ala. +, Minn. +, Tex. +, La. +, Colo. +, N.C. +, Tenn. +, S.C. +, Pa. +, Calif. +, Nev. +, Ark. +, Iowa +, Ind. +, Puerto Rico +, Md. +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, N.W.T. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Ohio +, Kans. +, Nebr. +, Okla. +, Utah +, Ky. +, Ill. +, Ga. +, Idaho +, Mo. +, Mich. +, Alaska +, Mont. +, Miss. +  and Oreg. +
not waisted +
capillary +
pistillate +  and staminate +
bisexual +  and fertile +
round +  and compressed +
reduced +
(0)1(2-3)-veined +
shorter or longer +
subtending +
0 +  and 1/2 +
subequal +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
uncinate +
paniculate +  and racemose +
hollow +  and solid +
puberulent +  and glabrous +
not absent +
lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
obtuse +  and decurrent +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
firm +  and membranous +
inconspicuous +
concealed +  and prominent +
2 +  and 1 +
acuminate +  and lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
20cm +  and 60cm +
longer than wide +
cleistogamous +
spikelike +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
pliable +  and stiff +
capillary +
0.4 cm4 mm <br />0.004 m <br /> (5 cm50 mm <br />0.05 m <br />) +
dry +  and fleshy +
2 cm20 mm <br />0.02 m <br /> (20 cm200 mm <br />0.2 m <br />) +
spikelike +
puberulent +  and glabrous +
5 +  and 20 +
compressed +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Muhlenbergia filipes +
Muhlenbergia sericea +
Muhlenbergia +
species +
membranous +
setaceous +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
shorter than to longer than the florets +
acute +  and acuminate +
7 +  and 13 +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +