– desert centaury, tall centaury
Distribution: East of the Cascades in Washington; east to Nebraska and Colorado, south to eastern California.
Habitat: Moist places, especially around alkaline lakes and hot springs.
– Muhlenberg`s centaury
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Idaho and Nevada.
Habitat: Forest openings, wet areas at low to middle elevations.