DISTRIBUTION AND OCCURRENCE
SPECIES: Salix lasiandra | Pacific Willow 



GENERAL DISTRIBUTION : 
Pacific willow is distributed from the interior of Alaska and the Yukon
Territory southeast to Saskatchewan and the Black Hills, southward along
the coast to southern California, and south through the Rocky Mountains
to New Mexico [7,25].  It is mostly absent from the dry interior country
of eastern Washington, Oregon, southern Idaho, Nevada, and Utah [36].
Variety lasiandra grows mostly west of the Cascades but also occurs in
moist parts of eastern Washington, northern Idaho, and northwestern
Montana.  Variety caudata grows east of the Cascades, especially in the
Rocky Mountains [8].


ECOSYSTEMS : 
   FRES20  Douglas-fir
   FRES21  Ponderosa pine
   FRES23  Fir - spruce
   FRES26  Lodgepole pine
   FRES28  Western hardwoods
   FRES29  Sagebrush


STATES : 
     AK  CA  CO  ID  MT  NV  NM  ND  OR  SD
     UT  WA  WY  AB  BC  SK  YT


ADMINISTRATIVE UNITS : 
     BAND  CHCU  CRLA  DEVA  GLAC  GRCA
     LAVO  LABE  MORA  NABR  NOCA  OLYM
     PINN  PORE  REDW  YELL  YOSE  ZION


BLM PHYSIOGRAPHIC REGIONS : 
    1  Northern Pacific Border
    2  Cascade Mountains
    3  Southern Pacific Border
    4  Sierra Mountains
    5  Columbia Plateau
    6  Upper Basin and Range
    7  Lower Basin and Range
    8  Northern Rocky Mountains
    9  Middle Rocky Mountains
   10  Wyoming Basin
   11  Southern Rocky Mountains
   12  Colorado Plateau


KUCHLER PLANT ASSOCIATIONS : 
   K002  Cedar - hemlock - Douglas-fir forest
   K003  Silver fir - Douglas-fir forest
   K004  Fir - hemlock forest
   K005  Mixed conifer forest
   K007  Red fir forest
   K008  Lodgepole pine - subalpine forest
   K011  Western ponderosa forest
   K012  Douglas-fir forest
   K014  Grand fir - Douglas-fir forest
   K023  Juniper - pinyon woodland
   K024  Juniper steppe woodland
   K025  Alder - ash forest
   K026  Oregon oakwoods
   K028  mosaic of K002 and K026
   K029  California mixed evergreen forest
   K030  California oakwoods
   K055  Sagebrush steppe


SAF COVER TYPES : 
   207  Red fir
   210  Interior Douglas-fir
   221  Red alder
   222  Black cottonwood - willow
   227  Western redcedar - western hemlock
   229  Pacific Douglas-fir
   230  Douglas-fir - western hemlock
   243  Sierra Nevada mixed conifer
   244  Pacific ponderosa pine - Douglas-fir


SRM (RANGELAND) COVER TYPES : 
NO-ENTRY


HABITAT TYPES AND PLANT COMMUNITIES : 
Pacific willow typically occurs in early seral communities along river
banks or on moist alluvium [8,18].  In the Rocky Mountains these
riparian communities are often adjacent to zones of big sagebrush
(Artemisia tridentata), Douglas-fir (Pseudotsuga menziesii), or
ponderosa pine (Pinus ponderosa) [8,18].  In California it occurs in
riparian forests as a codominant with red alder (Alnus rubra), black
cottonwood, and Oregon ash (Fraxinus latifolia) [35].  Published
classification schemes listing Pacific willow as an indicator or
dominant in community types (cts), habitat types (hts), riparian site
types (rst), or dominance types (dts) are presented below:

   Area         Classification                Authority

sw US           Riparian hts                  Szaro & Patton 1987
sw MT           Riparian veg. rst,hts,cts     Hansen & others 1988
   MT           Riparian veg. dts             Hansen & others 1988 

Related categories for Species: Salix lasiandra | Pacific Willow