– common centaury, European centaury
Distribution: Chiefly west of the Cascades crest in Washington; British Columbia to California east to Montana; also in eastern North America.
Habitat: Wet meadows, prairies, grasslands, roadsides, and wasteland.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Annual, Biennial
– branching centaury, lesser centaury
Distribution: Occurring east of the Cascades crest in Washington, where known historically; Washington, waif in California, and more common in eastern North America.
Habitat: Meadows, wastelots, and other disturbed areas, generally where moist.
Origin: Introduced from Eurasia
Flowers: June-August
Growth Duration: Perennial