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bog muhly, muhlenbergie uniflore

Habit Plants perennial; loosely matted.
Culms

5-45 cm, arising from the bases of old depressed culms, compressed-keeled, developing branches below the lower leaf nodes;

internodes mostly glabrous, sometimes minutely puberulent below the nodes.

Sheaths

longer than the internodes, keeled, keels scabridulous, not becoming papery or spirally coiled when old;

ligules 0.5-1.5 mm, membranous, truncate to obtuse, erose, without lateral lobes;

blades 1-15 cm long, 0.8-2 mm wide, flat to conduplicate, smooth or scabridulous abaxially, hirtellous adaxially, midveins thickened and whitish proximally.

Panicles

2-20 cm long, (0.2)2.5-6 cm wide, diffuse;

primary branches 0.4-6 cm long, about 0.1 mm thick, ascending, diverging 10-60° from the rachises, naked basally;

pedicels 0.2-7 mm, glabrous.

Spikelets

1.3-2.1 mm, dark purplish to plumbeous, occasionally with 2 florets.

Glumes

equal, 0.4-1.3 mm, glabrous, 1-veined, apices scabrous, acute to obtuse, sometimes erose or notched, unawned;

lemmas 1.2-2 mm, oblong-elliptic, dark purplish to plumbeous, glabrous, faintly 3-veined, apices acute to obtuse, unawned;

paleas 1.3-2.1 mm, oblong-elliptic, glabrous, acute to obtuse;

anthers 0.6-0.9 mm, dark purple.

Caryopses

0.6-0.8 mm, ovoid, brownish.

2n

= 42.

Muhlenbergia uniflora

Distribution
from FNA
CT; MA; MD; ME; MI; MN; NH; NJ; NY; OR; PA; RI; VT; WI; BC; NB; NL; NS; ON; QC
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[BONAP county map]
Discussion

Muhlenbergia uniflora grows in bogs, wet meadows, and lake shores in sandy or peaty, often acidic, soils, at elevations of 0-650 m. It is native to eastern North America, but was collected once in British Columbia, probably having been introduced from ship ballast, and was recently collected from a commercial cranberry bog in Oregon. The collection from Texas may also be an introduction.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 25, p. 181.
Parent taxa Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Muhlenbergia
Sibling taxa
M. andina, M. appressa, M. arenacea, M. arenicola, M. arizonica, M. arsenei, M. asperifolia, M. brevis, M. bushii, M. californica, M. capillaris, M. crispiseta, M. curtifolia, M. cuspidata, M. depauperata, M. diversiglumis, M. dubia, M. dumosa, M. elongata, M. eludens, M. emersleyi, M. expansa, M. filiculmis, M. filiformis, M. fragilis, M. frondosa, M. glabrifloris, M. glauca, M. glomerata, M. jonesii, M. lindheimeri, M. longiligula, M. mexicana, M. microsperma, M. minutissima, M. montana, M. palmeri, M. pauciflora, M. pectinata, M. peruviana, M. polycaulis, M. porteri, M. pungens, M. racemosa, M. ramulosa, M. repens, M. reverchonii, M. richardsonis, M. rigens, M. rigida, M. schreberi, M. sericea, M. setifolia, M. sinuosa, M. sobolifera, M. spiciformis, M. straminea, M. sylvatica, M. tenuiflora, M. tenuifolia, M. texana, M. thurberi, M. torreyana, M. torreyi, M. utilis, M. villiflora, M. wrightii, M. ×curtisetosa, M. ×involuta
Name authority (Muhl.) Fernald
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