Muhlenbergia sinuosa Swallen
Family: Poaceae
Muhlenbergia sinuosa image
Max Licher  

Plants annual; delicate. Culms 12-50 cm, erect to geniculate; internodes mostly glabrous and smooth or scabridulous, scabridulous or strigulose below the nodes. Sheaths usually longer than the internodes, glabrous, smooth or scabridulous; ligules 1.5-3.1 mm, hyaline, truncate to obtuse, irregularly toothed to lacerate, with lateral lobes that exceed the central portion; blades 2-8.5 cm long, 0.8-2 mm wide, flat, sometimes involute, scabridulous abaxially, shortly pubescent to minutely villous adaxially, midveins prominent abaxially. Panicles 10-26 cm long, 2.8-8 cm wide; primary branches 2.6-7 cm, often capillary, diverging 25-80° from the rachises; pedicels 4-7 mm, usually curved, often through 90° or more. Spikelets 1.4-2 mm. Glumes equal, 0.7-1.2mm, usually conspicuously strigulose, particularly near the margins and apices, 1-veined, acute to obtuse, unawned; lemmas 1.4-2 mm, oblong-elliptic, greenish, sometimes purplish-tinged, shortly appressed-pubescent on the midveins and margins, apices acute or obtuse, unawned; paleas 1.3-1.8 mm, oblong-elliptic, intercostal region sparsely short-pilose or glabrous; anthers 0.6-1.2 mm, olivaceous. Caryopses 0.8-1.2 mm, fusiform, brownish. 2n = 20, 24.

Muhlenbergia sinuosa grows in sandy soil along washes, on open slopes and rocky ledges, and in roadside ditches, at elevations of 1650-2300 m. It is usually found in oak-pine forests, pinyon-juniper woodlands, oak-grama savannahs, and riverine woodlands. Its range extends from the southwestern United States into northern Mexico.

FNA 2003, Gould 1980
Common Name: marshland muhly Duration: Annual Nativity: Native Lifeform: Graminoid General: Delicate annuals with stems 12-50 cm, erect to geniculate, much branched at lower nodes, strigose below the nodes, sheaths glabrous, smooth or minutely roughened. Vegetative: Blades 2-8.5 cm long, 0.5-2 mm wide, flat, or loosely involute, minutely roughened below, shortly pubescent to minutely villous above, midveins prominent below; ligules 1.5-3 mm, hyaline, truncate to obtuse, irregularly toothed to lacerate, with lateral Inflorescence: Open diffuse panicle 10-26 cm long, 2.5-8 cm wide, primary branches 2.5-7 cm, often capillary, diverging 25-80 degrees from the rachises, pedicels 4-7 mm, usually curved with spikelets 1.5-2 mm, greenish and often mottled with purple; glumes equal or nearly so, 0.5-1.5 mm, conspicuously strigulose, especially near the margins and apices, acute to obtuse, unawned; lemmas 1.5-2 mm, oblong-elliptic, greenish, sometimes purplish-tinged, shortly appressed-pubescent on midveins and margins, apices acute or obtuse, unawned. Ecology: Found in sandy soils along washes, on gravelly soils of canyon bottoms, open slopes and rocky ledges from 2,500-7,000 ft (762-2134 m); flowers August-October. Notes: Similar to M. fragilis but the glumes are strigulose in this species as opposed to being glabrous in M. fragilis. Ethnobotany: Unknown Etymology: Muhlenbergia is named for Gotthilf Heinrich Ernst Muhlenberg (1753-1815) a clergyman and botanist from Pennsylvania; while sinuosa means being sinuous or wavy. Synonyms: None Editor: SBuckley, 2010
Muhlenbergia sinuosa image
Max Licher  
Muhlenbergia sinuosa image
Max Licher  
Muhlenbergia sinuosa image
Max Licher  
Muhlenbergia sinuosa image
Max Licher  
Muhlenbergia sinuosa image
Max Licher  
Muhlenbergia sinuosa image
Max Licher  
Muhlenbergia sinuosa image
Sue Carnahan  
Muhlenbergia sinuosa image
Sue Carnahan  
Muhlenbergia sinuosa image
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