The genus is included in the Cheilanthoideae subfamily of the Pteridaceae.

[2] They are commonly found growing in cracks between rocks.

Their leaves are generally shorter than 40 cm (16 in) and have rounded bluish or grayish green segments.

Often the lower surface of the segments is coated in a white dust, and the sporangia contain brown spores.

As of June 2024[update], the Checklist of Ferns and Lycophytes of the World recognized the following species:[3] This Pteridaceae-related article is a stub.