Walker Ridge

Map     Satellite

Walker Ridge is a particularly rich area botanically with a diversity of plant communities and a number of restricted or endemic species. A unique mixed evergreen forest occurs here consisting of knobcone pine, Pinus attenuata, canyon oak, Quercus chrysolepis, and California nutmeg, Torreya californica.

Chaparral on the shale soils is dominated by chamise, Adenostoma fasciculatum, and buck brush, Ceanothus cuneatus. On the serpentine the chaparral is dominated by leather oak, Quercus durata, whiteleaf manzanita, Arctostaphylos viscida, and Ceanothus jepsonii, and in the northern portion by extensive stands of the MacNab cypress, Cupressus macnabiana.

Within the area there are meadow and spring communities. At Buck Flat, in the moist serpentine soils, Senecio clevelandii and Delphinium uliginosum are found. Astragalus clevelandii is found on the serpentine at Grapevine Springs. Fritillaria purdyi and Lomatium ciliolatum var. hooveri are found along the serpentine ridge. Other species of note include Balsamorhiza macrolepis, Madia hallii, Eriogonum nervulosum, and the localized white flowering form of Streptanthus breweri.

Numerous erosional features characteristic of arid landscapes can be seen from the summit.

Integrity: Several mines and a gravel road are within the area. There is some grazing.

Use: Research, educational, observational. 

September 1975

Inventory of California Natural Areas
Revision © 2009 Steven Louis Hartman

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