DISTRIBUTION AND OCCURRENCE
SPECIES: Corylus cornuta var. californica | California Hazel 



GENERAL DISTRIBUTION : 
California hazel occurs in California, Oregon, Washington, and British
Columbia [26].  In California it occurs along the Coast Range from Santa
Cruz County northward along the coast to Del Norte County, eastward
through Siskiyou County, and southward in the Sierra Nevada to Tulare
County [22].  In Oregon and Washington it occurs mostly west and
occasionally east of the Cascades [13].  In British Columbia it occurs
on the lower mainland and on Vancouver Island [12].

Intermediate forms of C. cornuta var. californica x C. cornuta var.
cornuta may occur in the Fraser Canyon and Columbia Forest Region of
British Columbia [5].

Corylus cornuta var. californica forma glandulosa is frequently found
along the Pacific Coast.  It is more frequent than C. cornuta var.
californica forma californica on southern Vancouver Island but becomes
scarcer inland [5].


ECOSYSTEMS : 
   FRES20  Douglas-fir
   FRES23  Fir - spruce
   FRES24  Hemlock - Sitka spruce
   FRES27  Redwood
   FRES28  Western hardwoods


STATES : 
     CA  OR  WA  BC


ADMINISTRATIVE UNITS : 
     CODA  CRLA  MORA  NOCA  OLYM  PORE
     REDW  WHIS


BLM PHYSIOGRAPHIC REGIONS : 
   1  Northern Pacific Border
   2  Cascade Mountains
   3  Southern Pacific Border
   4  Sierra Mountains


KUCHLER PLANT ASSOCIATIONS : 
   K001  Spruce - cedar - hemlock forest
   K002  Cedar - hemlock - Douglas-fir forest
   K003  Silver fir - Douglas-fir forest
   K005  Mixed conifer forest
   K006  Redwood forest
   K007  Red fir forest
   K012  Douglas-fir forest
   K026  Oregon oakwoods
   K028  Mosaic of K002 and K026
   K029  California mixed evergreen forest


SAF COVER TYPES : 
   211  White fir
   221  Red alder
   222  Black cottonwood - willow
   224  Western hemlock
   226  Coastal true fir - hemlock
   227  Western redcedar - western hemlock
   229  Pacific Douglas-fir
   230  Douglas-fir - western hemlock
   232  Redwood 
   233  Oregon white oak
   234  Douglas-fir - tanoak - Pacific madrone


SRM (RANGELAND) COVER TYPES : 
NO-ENTRY


HABITAT TYPES AND PLANT COMMUNITIES : 
Published classifications listing California hazel as a dominant in
plant associations (pas) or community types (cts) are presented below:

        Location              Classification     Authority

  OR:  Willamette Valley      forest cts         Thilenius  1968 
       c Cascades             forest pas, cts    Dyrness and others  1974
       Mary's Peak Watershed  forest cts         Anderson 1969
       Mary's Peak Watershed  forest cts         Anderson 1967  
s OR:  Cascade Mountain
       Province               forest pas         Atzet and McCrimmon 1990

Related categories for Species: Corylus cornuta var. californica | California Hazel