Perhaps Thomas Charles Bridges, 1807-1865, a collector in California.
Rhizome: short-creeping or erect, light-brown scales, darker at a center stripe with age.
Frond: 35 cm high by 8 cm wide, evergreen, monomorphic, blade/stipe ratio: .
Stipe: chestnut-brown, continued into the rachis, shiny, rounded above, glabrous, vascular bundles: 1.
Blade: 1-pinnate, linear, leathery, glabrous.
Pinnae: 6 to 12 pair, bluish-green, lower pinnae stalked, upper sessile, a terminal pinna like the upper lateral ones; margins entire; veins obscure, but netted, a distinctive characteristic if it can be seen.
Sori: oblong or linearly joined, submarginal, indusium: false, inrolled margins, sporangia: pale brown, maturity: summer.
Habitat: rocky slopes and cliffs, on granitic substrates.
Distribution: western North America in the Sierras and Wallowas.
Hardy to -20°C, USDA Zone 6.