– long-leaf evening primrose
Distribution: Occurring east of the Cascades in Washington; Washington south to California, east to Montana and Colorado.
Habitat: Meadows, benchland, and stream banks, from sagbrush plains to moderate elevations in the mountains, usually where dry by late summer.
– tansy-leaf evening primrose
Distribution: East of the Cascades, Washington to California, east to Idaho and Nevada
Habitat: Dry, often sandy or gravelly ground, low to moderate elevations
Flowers: June - August