Not one, but two ferns in a week's time! This one is in a different family, the Maidenhair Fern family (Pteridaceae) and is called Brewer's cliffbrake (Pellaea breweri). It likes rock crevices on limestone or granite and grows in the western U.S.
For more info on Brewer's cliffbrake, click here.
There aren't many ferns in the Great Basin desert, but they do exist, usually in moister sites. This is brittle bladderfern (Cystopteris fragilis), also known as fragile fern. It's part of the Cliff Fern Family (Woodsiaceae), which has three genera represented in this area.
There's more info about brittle bladderfern here.
