About Erigeron radicatus Hook.
Erigeron radicatus Hook. is a North American species of flowering plant in the family Asteraceae. It is commonly known by two common names: Hooker's fleabane and taproot fleabane.
This species grows in central Canada, specifically in Alberta and Saskatchewan, as well as parts of the north-central United States, where it occurs primarily in the northern Rocky Mountains and the Black Hills. It has been recorded in Idaho, Montana, Utah, Wyoming, Colorado, Nebraska, and South Dakota, with a small number of isolated populations reported from North Dakota.
Erigeron radicatus is a small perennial herb that grows up to 12 centimeters (4.8 inches) tall. It produces a woody, branching caudex, and plants generally produce only 1 flower head per stem. Each flower head holds 12–85 purple or white ray florets, which surround numerous yellow disc florets. This species grows on rocky slopes, ledges, ridges, and cliff faces at high elevations.
