7 species
1 subspecies and varieties
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Leymus cinereusGreat Basin lyme grass
Distribution: East of the Cascades in Washington; central and western North America.
Habitat: Sagebrush-steppe, arid grasslands, forest edges, and other dry, open areas in the intermountain west.
Origin: Native
Flowers: June-July
Leymus condensatusgiant wildrye
Origin: Native
Leymus flavescenssand lyme grass
Origin: Native
Flowers: June - July
Leymus mollisAmerican dunegrass
Distribution: Coastal areas of Washington; Alaska south to California; northern areas of North America.
Habitat: Coastal sand dunes, marshes, headlands.
Origin: Native
Flowers: June-August
ssp. mollis – yellow ryegrass
Leymus racemosusmammoth lyme grass
Origin: Introduced
Flowers: July - August
Leymus triticoidesbeardless lyme grass
Origin: Native
Flowers: June - August
Leymus ×vancouverensisVancouver wildrye
Origin: Native