Muhlenbergia glomerata |
Muhlenbergia filiculmis |
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bristly muhly, marsh muhly, muhlenbergie agglomeree, spike muhly |
slimstem muhly |
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Habit | Plants perennial; rhizomatous, not cespitose. | Plants perennial; cespitose, not rhizomatous. |
Culms | 30-120 cm tall, 0.8-2.5 mm thick, erect, seldom branched above the base; internodes dull, mostly puberulent (sometimes sparsely so), terete, rarely keeled, strigose immediately below the nodes. |
5-30(40) cm, erect, rounded near the base; internodes smooth or scabridulous. |
Sheaths | scabridulous, slightly keeled; ligules 0.2-0.6 mm, membranous, truncate, lacerate-ciliolate; blades 2-15 cm long, 2-6 mm wide, flat, usually scabrous or scabridulous, occasionally smooth. |
longer than the lower internodes, glabrous, becoming flattened and papery or ribbonlike at maturity; ligules 2-4(5) mm, membranous, acute; blades 2-6 cm long, 0.4-1.6 mm wide, tightly involute, filiform, stiff, scabrous abaxially, sparsely hirtellous adaxially, apices sharp. |
Panicles | 1.5-12 cm long, 0.3-1.8 cm wide, lobed, dense; primary branches 0.2-2.5 cm, appressed; pedicels absent or to 1 mm, strigose. |
1.5-7 cm long, 0.4-2 cm wide, contracted, sometimes dense; primary branches 0.1-2.8 cm, mostly tightly appressed or diverging up to 30° from the rachises; pedicels 0.1-2 mm, scabrous. |
Spikelets | 3-8 mm. |
2.2-3.5 mm. |
Glumes | subequal, 3-8 mm (including the awn), about 1.3-2 times longer than the lemmas, smooth or scabridulous distally, 1-veined, acuminate, awned, awns to 5 mm; lemmas 1.9-3.1 mm, lanceolate, pubescent on the calluses, mid-veins, and margins, hairs to 1.2 mm, apices scabridulous, acuminate, unawned or awned, awns to 1 mm; paleas 1.9-3.1 mm, lanceolate, loosely pilose between the veins, apices acuminate; anthers 0.8-1.5 mm, yellowish. |
subequal, 0.8-2.5 mm, scabridulous distally; lower glumes 1-veined, awned, awns to 1.6 mm; upper glumes usually 3-veined, apices truncate to acute, 3-toothed, teeth sometimes shortly awned, awns to 0.6 mm; lemmas 2.2-3.5 mm, lanceolate, yellowish mottled with dark green, sparsely appressed-pubescent on the lower portion of the midveins and margins, hairs to 0.4 mm, apices scabridulous, acute to acuminate, awned, awns 1-5 mm, straight or flexuous; paleas 2.2-3.5 mm, lanceolate, acute to acuminate; anthers 1.5-2 mm, purplish. |
Caryopses | 1-1.6 mm, fusiform, brown. |
1.3-1.6 mm, fusiform, brownish. |
2n | = 20. |
= unknown. |
Muhlenbergia glomerata |
Muhlenbergia filiculmis |
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Distribution |
CO; CT; DC; IA; ID; IL; IN; KY; MA; MD; ME; MI; MN; MT; NC; ND; NE; NH; NJ; NV; NY; OH; OR; PA; RI; SD; UT; VA; VT; WA; WI; WV; WY; AB; BC; LB; MB; NB; NS; NT; ON; PE; QC; SK; YT
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AZ; CO; ND; NM; UT; WY |
Discussion | Muhlenbergia glomerata grows in meadows, marshes, bogs, alkaline fens, lake margins, stream banks, beside irrigation ditches and hot springs, and on gravelly slopes, in many different plant communities, at elevations of 30-2300 m. It is most common in southern Canada and the northeastern United States, but grows sporadically throughout the western United States. It is not known from Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Muhlenbergia filiculmis grows on rocky slopes, dry meadows, and dry gravelly flats in forest openings and grasslands, at elevations of 2500-3500 m in the southern Rocky Mountains and northern Arizona. Kartesz and Meacham (1999) report it as occurring in North Dakota and Utah, but neither of the sources cited (McGregor et al. 1986; Welsh et al. 1993) supports its occurrence in these states. It is sometimes difficult to distinguish Muhlenbergia filiculmis from M. montana, but that species has longer spikelets and lemma awns, and leaf blades that are flatter and not sharply tipped. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 25, p. 154. | FNA vol. 25, p. 181. |
Parent taxa | Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Muhlenbergia | Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Muhlenbergia |
Sibling taxa | ||
Synonyms | M. racemosa var. cinnoides, M. glomerata var. cinnoides | |
Name authority | (Willd.) Trin. | Vasey |
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