Erigeron watsonii is a rare North American species of flowering plant in the family Asteraceae known by the common name Watson's fleabane.

[4] Erigeron watsonii grows on rocky slopes in open areas featuring sagebrush or pine woodlands.

It is a small perennial herb rarely more than 10 centimeters (4 inches) tall, producing a thin taproot and a branching woody caudex.

It generally produces only one flower head per stem, but sometimes two.

Each head contains 13–25 white or pink ray florets, surrounding numerous yellow disc florets.