DISTRIBUTION AND OCCURRENCE
SPECIES: Rhododendron macrophyllum | Pacific Rhododendron 



GENERAL DISTRIBUTION : 
Pacific rhododendron is found along the Pacific Coast from British
Columbia to Monterey County in California [30,41].  It is widely
distributed in the Coast and Cascade Mountain Ranges [9,30,43].  Pacific
rhododendron is less abundant in the Coastal Mountains of Washington and
northern Oregon and more common south of the Siuslaw River [27].


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


STATES : 
     CA  OR  WA  BC


ADMINISTRATIVE UNITS : 
     NOCA  OLYM  REDW


BLM PHYSIOGRAPHIC REGIONS : 
    1  Northern Pacific Border
    2  Cascade Mountains


KUCHLER PLANT ASSOCIATIONS : 
   K001  Spruce - cedar - hemlock forest
   K002  Cedar - hemlock - Douglas-fir forest
   K003  Silver fir - Douglas-fir forest
   K004  Fir - hemlock forest
   K005  Mixed conifer forest
   K006  Redwood forest
   K009  Pine - cypress forest
   K029  California mixed evergreen forest


SAF COVER TYPES : 
   224  Western hemlock
   225  Western hemlock - Sitka spruce
   226  Coastal true fir - hemlock
   229  Pacific Douglas-fir
   230  Douglas-fir - western hemlock
   231  Port Orford-cedar
   232  Redwood
   234  Douglas-fir - tanoak - Pacific madrone


SRM (RANGELAND) COVER TYPES : 
NO-ENTRY


HABITAT TYPES AND PLANT COMMUNITIES : 
In the western hemlock (Tsuga heterophylla) zone of northwestern Oregon,
Pacific rhododendron is an indicator of cool, dry to mesic environments
[22].  Published classification schemes listing Pacific rhododendron as
an indicator species or a dominant part of vegetation are presented
below.

Preliminary plant associations of the Siskiyou Mountain Province [1]
The tanoak series of the Siskiyou Region of southwest Oregon [2]
A preliminary classification of forest communities in the central
  portion of the western Cascades in Oregon [12]
Vegetation of the Douglas-fir region [14]
Ecoclass coding system for the Pacific Northwest plant associations [18]
Plant association and management guide for the western hemlock zone: Mt.
  Hood National Forest [22]
Vegetation mapping and community description of a small western Cascade
  watershed [25]
Plant association and management guide for the Pacific silver fir zone:
  Mt. Hood and Willamette National Forests [26]
Plant association and management guide: Siuslaw National Forest [27]
Plant association and management guide: Willamette National Forest [28]
Riparian zone associations: Dessschutes, Ochoco, Fremont, and Winema
  National Forests [61]

Related categories for Species: Rhododendron macrophyllum | Pacific Rhododendron