Leymus
wildrye
7 species
1 subspecies and varieties
1 subspecies and varieties
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Leymus cinereus – Great Basin wildrye
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the northern Great Plains.
Habitat: Sagebrush-steppe, arid grasslands, forest edges, and other dry, open areas in the intermountain west.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the northern Great Plains.
Habitat: Sagebrush-steppe, arid grasslands, forest edges, and other dry, open areas in the intermountain west.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Leymus condensatus – giant wildrye
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, where native.
Habitat: Sagebrush steppe and valley bottoms.
Origin: Introduced from California
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, where native.
Habitat: Sagebrush steppe and valley bottoms.
Origin: Introduced from California
Flowers: May-July
Growth Duration: Perennial
Leymus flavescens – sand wildrye
Distribution: Occurring east of the Cascades crest in Washington; Washington to Oregon, east to Idaho.
Habitat: Sandy soils.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; Washington to Oregon, east to Idaho.
Habitat: Sandy soils.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Leymus mollis – American dunegrass
Distribution: Occurring west of the Cascades crest in Washington along the immediate marine coastline; Alaska to California, east across Canada to the Great Lakes region and northeastern North America.
Habitat: Coastal sand dunes, marshes, and headlands, where tolerant of salt water.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington along the immediate marine coastline; Alaska to California, east across Canada to the Great Lakes region and northeastern North America.
Habitat: Coastal sand dunes, marshes, and headlands, where tolerant of salt water.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
• ssp. mollis – yellow ryegrass
Leymus racemosus – mammoth lyme grass, mammoth wildrye
Distribution: Occurring east of the Cascades crest in Washington; central Washington to north-central Oregon, east to Wyoming.
Habitat: Sandy areas in sagebrush flats and plains.
Origin: Introduced from Eurasia
Flowers: July-August
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; central Washington to north-central Oregon, east to Wyoming.
Habitat: Sandy areas in sagebrush flats and plains.
Origin: Introduced from Eurasia
Flowers: July-August
Growth Duration: Perennial
Leymus triticoides – beardless lyme grass, beardless wildrye
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Texas.
Habitat: Dry to moist, often alkaline meadows.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Texas.
Habitat: Dry to moist, often alkaline meadows.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Leymus ×vancouverensis – Vancouver wildrye
Distribution: Occurring west of the Cascades crest in Washington along the marine coast; British Columbia to California.
Habitat: Marine coastal shores.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington along the marine coast; British Columbia to California.
Habitat: Marine coastal shores.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
