Ionactis stenomeres, the Rocky Mountain aster,[2] is a rare North American species in the family Asteraceae.

It occurs in the Province of British Columbia in western Canada and also in the northwestern United States (Washington, Idaho, Montana).

[3] Ionactis stenomeres is a small perennial up to 30 cm (12 in) tall, with a woody underground caudex.

The plant usually produces only one flower head, each with 7-21 blue or lavender ray flowers surrounding yellow disc flowers.

This Astereae article is a stub.