Pellaea

Pellaea, or cliff breaks, is a genus some 55 - 65 species, most of which are endemic to the southwestern United States and Mexico, with a number of species also occuring in southern Africa.

They are small to medium sized ferns evergreen which tend to inhabit dry, rocky places, and often grow in full sun. Many species have foliage which transitions from frosted green to sun-repellant blue as light increases.

Most of the species native to America do not transplant readily.

The 1997 IUCN Red List of Threatened Plants lists four species as threatened.