Dry to vernally moist open forest, meadows and mossy or grassy slopes; low to mid-elevations; scattered but locally common. Occurs from southern B.C. to southern California and east to Saskatchewan, South Dakota and Colorado.
Slightly acid to mildly alkaline.
Dry to fresh, moisture-deficient sites.
Very shade intolerant.
Climax on drier sites, seral on moister sites.
Meadow communities in Garry oak ecosystems.