Sporobolus
dropseed
5 species
2 subspecies and varieties
2 subspecies and varieties
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Sporobolus airoides – alkali sacaton
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California and Mexico, east to the Great Plains; introduced in eastern North America.
Habitat: Mesic or damp slopes and flats, often where alkaline, shores, grasslands, vernal pools, and hot springs at low to middle elevations.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California and Mexico, east to the Great Plains; introduced in eastern North America.
Habitat: Mesic or damp slopes and flats, often where alkaline, shores, grasslands, vernal pools, and hot springs at low to middle elevations.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
Sporobolus compositus – composite dropseed, tall dropseed
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east across North America to the Atlantic Coast.
Origin: Native
Flowers: August-September
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east across North America to the Atlantic Coast.
Origin: Native
Flowers: August-September
Growth Duration: Perennial
• var. compositus – rough dropseed
Sporobolus cryptandrus – sand dropseed
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to southern California, east across most of North America to the Atlantic Coast except in the extreme southeastern U.S.
Habitat: Sagebrush desert, especilly where sandy, to the foothills and grassland.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to southern California, east across most of North America to the Atlantic Coast except in the extreme southeastern U.S.
Habitat: Sagebrush desert, especilly where sandy, to the foothills and grassland.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Sporobolus neglectus – small dropseed
Distribution: Occurring east of the Cascades crest in Washington; Washington and California, eastward from the Rocky Mountains to the Atlantic Coast.
Habitat: Dry pine forest, muddy or sandy riverbanks.
Origin: Native
Flowers: July-September
Growth Duration: Annual
Distribution: Occurring east of the Cascades crest in Washington; Washington and California, eastward from the Rocky Mountains to the Atlantic Coast.
Habitat: Dry pine forest, muddy or sandy riverbanks.
Origin: Native
Flowers: July-September
Growth Duration: Annual
Sporobolus vaginiflorus – poverty dropseed
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to Washington and California, east to Idaho and the southwestern U.S.; native from Great Plains east to Atlantic Coast.
Habitat: Roadsides, fields, and other disturbed, open areas.
Origin: Introduced from eastern North America
Flowers: July-September
Growth Duration: Perennial
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to Washington and California, east to Idaho and the southwestern U.S.; native from Great Plains east to Atlantic Coast.
Habitat: Roadsides, fields, and other disturbed, open areas.
Origin: Introduced from eastern North America
Flowers: July-September
Growth Duration: Perennial
• var. vaginiflorus – poverty dropseed
