pellaea

Of the five species of pellaea, P. Breweri is the hardiest as to enduring high altitudes and stormy weather and at the same time it is the most fragile of the genus.

The Yosemite John Muir 1876

Many fine ferns dwell here also, especially the beautiful and interesting rock-ferns -- pellaea, and cheilanthes of several species -- fringing and rosetting dry rock-piles and ledges; woodwardia and asplenium on damp spots with fronds six or seven feet high; the delicate maiden-hair in mossy nooks by the falls, and the sturdy, broad-shouldered pteris covering nearly all the dry ground beneath the oaks and pines.

The Yosemite John Muir 1876

Naturally enough the greater number are rock ferns -- pellaea, cheilanthes, polypodium, adiantum, woodsia, cryptogramma, etc., with small tufted fronds, lining cool glens and fringing the seams of the cliffs.

The Yosemite John Muir 1876