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Holcomb Valley

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Holcomb Valley vegetation is primarily a ponderosa pine, Pinus ponderosa, woodland intermixed with open grasslands.  Pinyon pine, Pinus monophylla, and Western juniper, Juniperus occidentalis, are found in portions of the forested area, often with mountain mahogany, Cercocarpus ledifolius, as the main element of the understory.  There is a stand of lodgepole pine, Pinus contorta ssp. murrayana, in the northwestern section of the valley.

Great Basin sage scrub, with Artemisia tridentata, rabbit brush, Chrysothamnus nauseosus, and bitter-brush, Purshia tridentata var. glandulosa, occurs, often in pure stands, in the area.

Of note are the rare or unusual plants that grow here. They include Eriophyllum lanatum var. obovatum, Ivesia argyrocoma, Mimulus exiguus, Mimulus purpureus, Castilleja lasiorhyncha and Senecio bernardinus.

Animal life is typical of the region.  The bald eagle, Haliaeetus leucocephalus, has been known to winter here.

Geologically the valley floor is Quaternary alluvium, with some Pleistocene nonmarine sedimentary terraces visible.  The area is underlain by Mesozoic granitics and Carboniferous marine metasedimentaries.

Integrity:  In the 1860's the valley was the scene of a gold rush; remnants are present.  Much of the area is grazed.  There are roads, various buildings, campsites, etc.; however, the area is still relatively undisturbed.

Use:  Research, educational, observational, present, on public portion.  Some private.

January 1981  

San Bernardino
Inventory of California Natural Areas
Revision © 2005 Steven Louis Hartman

 

 

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Last modified: December 06, 2005