Pellaea brachyptera

An uncommon fern found primarily in northern California and southwestern Oregon, often associated with serpentine or other ultramafic rocks.

Plant habit on Rattlesnake Ridge in the North Yolla Bolly Mountains, Trinity County, California, 28 May 2009.

Abaxial view of a pinna on Rattlesnake Ridge in the North Yolla Bolly Mountains, 28 May 2009.

Plant habit on Rattlesnake Ridge in the North Yolla Bolly Mountains, 28 May 2009.