Pellaea bridgesii Hooker

Bridge's cliff brake

Etymology Perhaps Thomas Charles Bridges, 1807-1865, a collector in California.
Description 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.
Culture Habitat: rocky slopes and cliffs, on granitic substrates. Distribution: western North America in the Sierras and Wallowas. Hardy to -20C, USDA Zone 6.
Pellaea bridgesii
Pellaea bridgesii. Habitat, granite, near Lake Tahoe, Nevada.
 J. Brew at Wikimedia Commons
Pellaea bridgesii
Pellaea bridgesii. Habit, pinnule.  Illustration by Edgar Paulton, from How to Know the Ferns and Fern Allies, John T. Mickel, 1979 Wm. C. Brown Co.
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