Muhlenbergia repens
Muhlenbergia reverchonii
creeping muhly, red muhly
seep muhly
5-42 cm tall, 0.5-1 mm thick, decumbent near the base, forming dense mats;
internodes glabrous, slightly nodulose.
40-80 cm, stiffly erect from the base, not conspicuously branched;
internodes glabrous, sometimes puberulent below the nodes.
shorter or longer than the internodes, glabrous;
ligules 0.1-1(1.8) mm, membranous, truncate, occasionally lacerate;
blades 0.4-6 cm long, 0.5-1.4 mm wide, involute, glabrous, smooth or scabridulous adaxially.
shorter than the internodes, smooth or scabridulous, basal sheaths rounded, not becoming spirally coiled when old;
ligules (2)4-7(9) mm, firmer near the base, obtuse, lacerate;
blades 8-35 cm long, 1-2 mm wide, flat or involute, filiform, glabrous abaxially, densely hirtellous adaxially.
1-9 cm long, 0.1-0.6 cm wide, contracted, not dense, usually partially included in the upper leaf sheaths;
primary branches 0.2-3 cm, usually closely appressed at maturity, rarely diverging up to 40° from the rachises;
pedicels 0.2-3.6 mm, setulose.
10-20(30) cm long, 4-15 cm wide, about as wide as long, loosely contracted to open but not diffuse;
primary branches 1.4-10 cm, capillary, diverging up to 80° from the rachises, scabridulous, naked basally, lower branches with 5-15(20) spikelets;
pedicels 3-25 mm, longer than the spikelets, capillary, stiff, or flexuous.
2.6-4.2 mm, occasionally with 2 florets.
3.5-5 mm, stramineous or brownish to purplish.
subequal, 1.1-3.6 mm, from 1/2 as long as to equaling the lemmas, light green, 1(2-3)-veined, acute, unawned;
lemmas 2.6-3.2(4.2) mm, lanceolate, dark greenish or mottled, glabrous or the calluses and margins appressed-pubescent, hairs to 0.3 mm, apices scabridulous, attenuate, usually mucronate, mucros 0.1-0.3 mm;
paleas 2.1-3.3 mm, lanceolate, smooth or scabridulous, acute;
anthers 0.7-1.4 mm, yellow to purplish.
subequal, 1-3 mm, shorter than the florets, hyaline, mostly sparsely hirtellous, apices glabrous, 1-veined (sometimes faintly so), acute, occasionally mucronate, mucros shorter than 0.7 mm;
lemmas 3.5-5 mm, narrowly lanceolate, calluses hairy, hairs to 0.5 mm, lemma bodies glabrous and smooth, apices scabridulous, acuminate, awned, awns 0.5-4(6) mm, clearly demarcated from the lemma bodies;
paleas 3.5-5 mm, narrowly lanceolate, mostly glabrous;
anthers 1.1-2 mm, yellowish to purplish.
1.1-1.5 mm, ellipsoid to ovoid, brownish.
2-2.4 mm, fusiform, brownish.
= 60, 70-72.
= 20.
Muhlenbergia repens
Muhlenbergia reverchonii
Muhlenbergia repens grows in open, sandy meadows, canyon bottoms, calcareous rocky flats, gypsum flats, and on rolling slopes and roadsides, at elevations of 100-3120 m. Its range extends from the southwestern United States to southern Mexico.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Muhlenbergia reverchonii grows on calcareous rocky slopes, flats, and limestone rock outcrops, at elevations of 150-650 m. It is restricted to Oklahoma and Texas. Muhlenbergia reverchonii resembles M. capillaris and M. setifolia in many respects, but differs from the former in its smooth and shiny lemmas, and from the latter in its wider panicles, spreading panicle branches, acute glumes, and more shortly awned lemmas.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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