Ionactis, conmmon name Stiff-leaved Asters or ankle-asters, is small genus of plants belonging to the daisy family. These aster-like plants are endemic to North America (Canada and the United States). One species is widespread across much of the eastern half of the continent, while two others are rare endemics with very restricted ranges (see below).

Ionactis, conmmon name Stiff-leaved Asters or ankle-asters, is small genus of plants belonging to the daisy family. These aster-like plants are endemic to North America (Canada and the United States). One species is widespread across much of the eastern half of the continent, while two others are rare endemics with very restricted ranges (see below).