4 species
2 subspecies and varieties
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Sporobolus airoidesalkali 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
Sporobolus composituscomposite dropseed, tall dropseed
Origin: Native
Growth Duration: perennial
var. compositus – rough dropseed
Sporobolus cryptandrussand dropseed
Distribution: British Columbia south, east of the Cascades, to southern California, east to Ontario, Maine, and most of the United States except the extreme southeast.
Habitat: Sagebrush desert, especilly where sandy, to the foothills and grassland.
Origin: Native
Flowers: June - July
Growth Duration: perennial
Sporobolus neglectussmall dropseed
Origin: Native
Flowers: July - September
Growth Duration: annual