Frenzel Creek Research Natural Area
Map SatelliteThis area supports a varied serpentine barrens flora as well as several rare plants.
Two cypress grow here, the Sargent and the MacNab, Cupressus sargentii and Cupressus macnabiana. The former is at its northeasternmost limit here; there are groves of young trees and a few large old ones, 21 meters (70 feet) high and 60 centimeters (24 inches) in diameter. Limited amounts of undisturbed old-growth MacNab cypress occur here, with individuals reaching 9 meters (30 feet) in height and 60 centimeters (24 inches) in diameter.
Rare Flora: Eight taxa found in the drainage are listed by CNPS, including Astragalus clevelandii, Antirrhinum subcordatum, Hersperolinum drymarioides, Mimulus brachiatus, Mimulus glaucescens, Senecio clevelandii, and Streptanthus morrisonii.
A serpentine chaparral association occupies portions of the area.
The area lies within the drainage of the creek, which traverses it, and is characterized by the rocky Henneke soil as well as serpentine.
Integrity: The area is virtually undisturbed though there are several trails and mineral prospects on the eastern edge.
Use: Research.
Ref: Keeler-Wolf, T. 1983. An ecological survey of the Frenzel Creek Research Natural Area, Mendocino National Forest, Colusa County, California. Unpublished report on file, Pacific Southwest Research Station, Albany, Calif.
1983
Colusa
Inventory of California Natural Areas
Revision © 2005 Steven Louis Hartman
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