DISTRIBUTION AND OCCURRENCE
SPECIES: Chamaecyparis lawsoniana | Port-Orford-Cedar 



GENERAL DISTRIBUTION : 
Port-Orford-cedar has a very limited distribution, occurring near the
Pacific Ocean in southwestern Oregon and northwestern California.  The
northern limit of its distribution is near Coos Bay, Oregon.  The
species' range extends southward about 220 miles (350 km) to the central
portion of the Mad River drainage in Humbolt County, California [10].
Isolated populations occur near Mount Shasta and the Trinity Mountains
in northern California [7,10].  It occurs in greatest abundance within
about 40 miles of the coast [7].  Farther inland, its distribution is
spotty, and it is mostly limited to sites with abundant soil moisture
and/or atmospheric moisture [3,37].  Port-Orford-cedar is cultivated in
Hawaii [39].


ECOSYSTEMS : 
   FRES20  Douglas-fir
   FRES21  Ponderosa pine
   FRES23  Fir - spruce
   FRES24  Hemlock - Sitka spruce
   FRES27  Redwood
   FRES28  Western hardwoods


STATES : 
     CA  HI  OR


ADMINISTRATIVE UNITS : 
     REDW


BLM PHYSIOGRAPHIC REGIONS : 
   1  Northern Pacific Border
   4  Sierra Mountains


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


SAF COVER TYPES : 
   207  Red fir 
   211  White fir
   223  Sitka spruce
   229  Pacific Douglas-fir
   231  Port Orford-cedar
   232  Redwood
   233  Oregon white oak
   234  Douglas-fir - tanoak - Pacific madrone
   243  Sierra Nevada mixed conifer
   247  Jeffrey pine


SRM (RANGELAND) COVER TYPES : 
NO-ENTRY


HABITAT TYPES AND PLANT COMMUNITIES : 
Port-Orford-cedar is found in many vegetation types where it either
forms small, pure stands, codominates with other conifers, or occurs as
scattered trees.  It is a long-lived, shade-tolerant climax species that
dominates or codominates with other coniferous trees to form mature
stands within four vegetation zones.  The following published
classification schemes list Port-Orford-cedar as a climax species or
dominant part of the vegetation in community types (cts) or plant
associations (pas) within the Sitka spruce (Picea sitchensis), white fir
(Abies concolor), western hemlock (Tsuga heterophylla), and
mixed-evergreen zones:

      Area                Classification              Authority

CA, OR: Siskiyou Mtns    general veg. pas       Atzet & Wheeler 1984

OR: Upper Illinois       general veg. cts       Atzet 1979
 River drainage   

CA, OR                   Port-Orford-cedar cts  Hawk 1977

OR, WA                   general veg. cts       Franklin & Dyrness 1973
 

Related categories for Species: Chamaecyparis lawsoniana | Port-Orford-Cedar