Hymenoxys rusbyi is a North American species of flowering plant in the daisy family known by the common names Rusby's rubberweed or Rusby's bitterweed.

[2][3] Hymenoxys rusbyi grows in open areas, generally at the edges of pine-oak forests at elevations of 1500–2500 meters (5000–8300 feet).

It is a perennial herb up to 150 cm (5 feet) tall.

One plant can produce sometimes as many as 250 flower heads in a branching, flat-topped array.

Each head has 6–8 yellow ray flowers and 25–50 tiny yellow disc flowers.