DISTRIBUTION AND OCCURRENCE
SPECIES: Rhamnus purshiana | Cascara 



GENERAL DISTRIBUTION : 
Cascara generally occurs from British Columbia down through northern
California.  It is mostly distributed west of the Cascades but can also
be found east to northern Idaho and northwestern Montana [1,12].
 


ECOSYSTEMS : 
   FRES20  Douglas-fir
   FRES21  Ponderosa pine
   FRES23  Fir - spruce
   FRES24  Hemlock - Sitka spruce
   FRES25  Larch
   FRES27  Redwood
   FRES28  Western hardwoods
   FRES34  Chaparral - mountain shrub


STATES : 
     CA  ID  MT  OR  WA


ADMINISTRATIVE UNITS : 
     CODA  CRLA  MORA  NOCA  OLYM  REDW
     SAJH  WHIS


BLM PHYSIOGRAPHIC REGIONS : 
   1  Northern Pacific Border
   2  Cascade Mountains
   4  Sierra Mountains
   5  Columbia Plateau
   8  Northern Rocky 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
   K010  Ponderosa shrub forest
   K011  Western ponderosa forest
   K012  Douglas-fir forest
   K029  California mixed evergreen forest


SAF COVER TYPES : 
   205  Mountain hemlock
   206  Engelmann spruce - subalpine fir
   210  Interior Douglas-fir
   211  White fir
   212  Western larch
   221  Red alder
   224  Western hemlock
   225  Western hemlock - Sitka spruce
   226  Coastal true fir - hemlock
   227  Western redcedar - western hemlock
   228  Western hemlock
   229  Pacific Douglas-fir
   230  Douglas-fir - western hemlock
   233  Oregon white oak
   234  Douglas-fir - tanoak - Pacific madrone
   237  Interior ponderosa pine


SRM (RANGELAND) COVER TYPES : 
NO-ENTRY


HABITAT TYPES AND PLANT COMMUNITIES : 
Cascara is predominately a shrub component on forested sites in the
Pacific Northwest.  No information was found listing cascara as an
understory dominant or site indicator.  Cascara was listed, however, as
a member of a prairie community occupying a floodplain in the Willamette
Valley, Oregon.  It was also listed as a representative species in a vine 
maple (Acer circinatum) plant association on a lava flow near Santiam Pass,
Oregon [9].  In southern Oregon, cascara was found as a component in many 
plant associations in the white fir (Abies concolor), Douglas-fir (Pseudotsuga
menziesii), and western hemlock (Tsuga heterophylla) series [2].

Plant associations (pas) in southern Oregon where cascara is listed as a
component are as follows [2]:

                 Constancy     Min.      Max.
    (pas)           (%)      % cover   % cover   Range   Mean   SD
--------------------------------------------------------------------
W. Hemlock Series   2.0        1.0       2.0      1.0     1.2   0.4
TSHE/GASH/LIBO      5.0        ---       ---      ---     1.0    0
TSHE/PSME/GASH      8.0        ---       ---      ---     1.0    0  
TSHE/GASH-CHUM     25.0        ---       ---      ---     1.5   0.7
TSHE/ACCI/RUNI     11.0        ---       ---      ---     1.0    0
White Fir Series    2.0        1.0       8.0      7.0     2.8   3.5
ABCO/ACGL/BENE     10.0        ---       ---      ---     1.0    0
ABCO/COCOC-AMAL    16.0        ---       ---      ---     8.0    0 
ABCO-CADE3/BENE     4.0        ---       ---      ---     1.0    0
ABCO-PSME/BEPI      3.0        ---       ---      ---     1.0    0 
Douglas-fir Series  3.0        3.0       3.0       0      3.0    0
PSME/RHDI/CYGR     33.0        ---       ---      ---     3.0    0

Scientific names for species used above are as follows:

ABCO   Abies concolor
ACCI   Acer circinatum
ACGL   Acer glabrum
AMAL   Amelanchier alnifolia
BENE   Berberis nervosa
BEPI   Berberis piperiana
CADE3  Calocedrus decurrens
CHUM   Chimaphila umbellata
COROC  Corylus cornuta californica
CYGR   Cynoglossum grande
GASH   Gaultheria shallon
LIBO   Linnaea borealis
PSME   Pseudotsuga menziesii
RHDI   Rhus diversiloba
RUNI   Rubus nivalis
TSHE   Tsuga heterophylla

Related categories for Species: Rhamnus purshiana | Cascara