Agrostis
bentgrass
15 species
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Agrostis capillaris – colonial bent
Distribution: Occurring on both sides of the Cascades crest in Washington; widely introduced throughout North America.
Habitat: Open, disturbed areas often at low elevations.
Origin: Introduced
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; widely introduced throughout North America.
Habitat: Open, disturbed areas often at low elevations.
Origin: Introduced
Flowers: June-August
Growth Duration: Perennial
Agrostis densiflora – California bentgrass
Distribution: Occurring west of the Cascades crest in western Washington along the outer coast; coastal Washington to California.
Habitat: Coastal bluffs.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in western Washington along the outer coast; coastal Washington to California.
Habitat: Coastal bluffs.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Agrostis exarata – spiked bent
Distribution: Widely distributed throughout Washington; Alaska south to California, east to Alberta, Nebraska and Texas.
Habitat: Moist areas, from near sea level to mid-elevations in the mountains.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Distribution: Widely distributed throughout Washington; Alaska south to California, east to Alberta, Nebraska and Texas.
Habitat: Moist areas, from near sea level to mid-elevations in the mountains.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Agrostis gigantea – black bent
Distribution: Occurring throughout Washington; found in nearly all parts of North America.
Habitat: Disturbed sites, roadsides, edge of agricultural fields, mostly at low elevations.
Origin: Introduced
Flowers: June-September
Growth Duration: Perennial
Distribution: Occurring throughout Washington; found in nearly all parts of North America.
Habitat: Disturbed sites, roadsides, edge of agricultural fields, mostly at low elevations.
Origin: Introduced
Flowers: June-September
Growth Duration: Perennial
Agrostis mertensii – Merten's bentgrass, northern bentgrass
Origin: Native
Flowers: July - August
Growth Duration: Perennial
Origin: Native
Flowers: July - August
Growth Duration: Perennial
Agrostis pallens – seashore bent
Distribution: Near the coast, Grays Harbor County, Washington south to San Francisco, California.
Habitat: Coastal sand dunes and immediately adjacent woods.
Origin: Native
Flowers: Late June - August
Growth Duration: Perennial
Distribution: Near the coast, Grays Harbor County, Washington south to San Francisco, California.
Habitat: Coastal sand dunes and immediately adjacent woods.
Origin: Native
Flowers: Late June - August
Growth Duration: Perennial
Agrostis stolonifera – spreading bent
Distribution: Widespread throughout Washington; Alaska south to California; also in Idaho, Utah and Colorado.
Habitat: Wet, disturbed areas that include streambanks, flooded fields, and ditches at low to moderate elevations.
Origin: Introduced?
Flowers: June-September
Growth Duration: Perennial
Distribution: Widespread throughout Washington; Alaska south to California; also in Idaho, Utah and Colorado.
Habitat: Wet, disturbed areas that include streambanks, flooded fields, and ditches at low to moderate elevations.
Origin: Introduced?
Flowers: June-September
Growth Duration: Perennial
Agrostis variabilis – alpine bent
Origin: Native
Flowers: Late July - September
Growth Duration: Perennial
Origin: Native
Flowers: Late July - September
Growth Duration: Perennial
