Notholaena
Notholaena (from Ancient Greek νόθο(ς) + χλαῖνα), cloak fern, is a genus of ferns in the Cheilanthoideae subfamily of the Pteridaceae. Ferns of this genus are mostly epipetric (growing on rock) or occurring in coarse, gravelly soils, and are most abundant and diverse in the mountain ranges of warm arid or semiarid regions. They typically have a creeping or erect rhizome and leaves that are pinnatifid to pinnate-pinnatifid with marginal sori protected by a false indusium formed from the reflexed margin of the leaf. Members of "Notholaena" also have a coating of whitish or yellowish farina (a powdery  secretion that prevents desiccation) on the surfaces of the leaves. The farina is often limited to the abaxial (lower) leaf surface, but may occur on the adaxial (upper) leaf surface as well. The similar genus "Argyrochosma" also has farinose leaves, but in that genus the ultimate segments of the leaves have entire margins and *are distinctly stalked, whereas in "Notholaena" the ultimate segments are usually lobed or pinnatifid and sessile or subsessile. "Notholaena" has in the past been used as a "catch-all" genus for a wide variety of species that did not fit well in other arid fern genera  but it has more recently been defined in a much narrower sense, making the genus much more morphologically and evolutionarily coherent. The genera "Argyrochosma" and "Astrolepis" were recently segregated from "Notholaena", and other former members of "Notholaena" are now in the genus "Cheilanthes". Species. , the "Checklist of Ferns and Lycophytes of the World" recognized the following species: