Muhlenbergia mexicana(synonym of Muhlenbergia glomerata) |
Muhlenbergia uniflora |
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wirestem muhly |
bog muhly |
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Habit | Plants perennial, 30–90 cm tall; rhizomatous. | Plants perennial but often seeming annual; 5–45 cm tall, tufted or loosely matted. |
Culms | 0.5–2 mm thick; much branched above the base, not nodulose; internodes dull, puberulent or glabrous for most of their length, sometimes strigose immediately below the nodes. |
compressed-keeled, branching at lower nodes; internodes mostly glabrous or sometimes minutely puberulent below the nodes. |
Leaves | blades 2–20 cm × 2–6 mm; flat, scabrous or smooth, those of the secondary branches similar in length and width to those of the main branches. |
blades 1–15 cm × 0.8–2 mm; flat to conduplicate; lower surface smooth or minutely scabrous; upper surface minutely hairy. |
Inflorescences | terminal and axillary, 2–21 × 0.3–3 cm; dense, appressed or diverging up to 30° from the inflorescence axis; primary branches 0.3–5.5 cm × over 0.1 mm. |
2–20 × (0.2)2.5–6 cm; diffuse; primary branches approximately 0.1 mm thick, ascending, diverging 10–60° from the inflorescence axes, naked basally; pedicels 0.2–7 mm, glabrous. |
Spikelets | 1.5–3.8 mm, often purple-tinged. |
1.3–2.1 mm; dark purplish to gray. |
Glumes | subequal, 1.5–3.7 mm, approximately as long as or slightly shorter than the lemmas, 1-veined, tapering from the bases to the acuminate tips; awnless or awned; awns; if present; to 2 mm. |
equal, 0.4–1.3 mm, glabrous on the veins, 1-veined; tips scabrous; acute to obtuse, sometimes erose; awnless. |
Lemmas | 1.5–3.8 mm, lanceolate, pubescent on calluses and lower portion of the midveins and margins; hairs shorter than the florets; less than 1.5 mm long; tips minutely scabrous, acuminate; awnless or awned; lemma awns 0–10 mm. |
1.2–2 mm, oblong-elliptic; dark purplish to gray, glabrous, faintly 3-veined; tips acute to obtuse; awnless. |
Anthers | 0.3–0.5 mm; yellowish to purplish. |
0.6–0.9 mm, purple. |
2n | =40. |
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Muhlenbergia mexicana |
Muhlenbergia uniflora |
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Distribution | ||
Discussion | Throughout North America. 2 varieties. Muhlenbergia mexicana flowers relatively late in summer after river levels drop. It is seldom collected. The similar M. andina has lemma hairs about as long as the lemma body. |
Bogs and lakeshores. 0–100 m. Est. British Columbia, northeastern North America. Exotic. Muhlenbergia uniflora is a diffuse-panicled bog grass that resembles M. minutissima, which has smaller spikelets with minutely hairy glumes and lives in alkaline habitats. Muhlenbergia uniflora was first collected in a Curry County cranberry bog in 1997 and was likely introduced with planting stock from eastern North America. |
Source | Flora of Oregon, volume 1, page 435 Barbara Wilson, Richard Brainerd, Nick Otting |
Flora of Oregon, volume 1, page 436 Barbara Wilson, Richard Brainerd, Nick Otting |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Muhlenbergia glomerata, Muhlenbergia racemosa | |
Web links |
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