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alkali muhly, scratchgrass

Habit Plants perennial, 10–60(100) cm tall; rhizomatous, occasionally stoloniferous.
Culms

with bases somewhat compressed-keeled;

internodes glabrous; shiny below the nodes.

Leaves

blades 2–7(11) cm × 1–2.8(4)mm; flat, occasionally conduplicate;

lower surface smooth or minutely scabrous;

upper surface minutely scabrous;

margins and midveins not conspicuously thickened; greenish;

tips acute.

Inflorescences

6–21 × 4–16 cm, broadly ovoid; open;

branches whitish;

primary branches 3–12 cm × 0.05–0.1 mm; capillary; lower branches spreading, not appearing clustered;

pedicels 3–14 mm; longer than the spikelets.

Spikelets

1.2–2.1 mm.

Glumes

equal, 0.6–1.7 mm, 1-veined; purplish, minutely scabrous particularly on the veins;

tips acute.

Lemmas

1.2–2.1 mm, lanceolate to oblong-elliptic; somewhat gray, glabrous; smooth, occasionally minutely scabrous near the tips;

tips acute; awnless or mucronate; the mucros to 0.3 mm.

Anthers

1–1.3 mm; greenish yellow to purplish at maturity.

2n

=20, 22, 28.

Muhlenbergia asperifolia

Distribution
[WildflowerSearch map]
[BONAP county map]
Discussion

Moist, alkaline meadows. 100–1500m. BR, BW, Col, ECas, Lava, Owy. CA, ID, NV, WA; north to British Columbia, northeast to Ontario, southeast to TX, south to Mexico. Native.

Source Flora of Oregon, volume 1, page 435
Barbara Wilson, Richard Brainerd, Nick Otting
Sibling taxa
M. andina, M. filiformis, M. mexicana, M. minutissima, M. richardsonis, M. uniflora
Synonyms Sporobolus asperifolius
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