DISTRIBUTION AND OCCURRENCE
SPECIES: Pinus ponderosa var. ponderosa | Pacific Ponderosa Pine 



GENERAL DISTRIBUTION : 
Pacific ponderosa pine ranges from latitude 52 degrees N in the Fraser
River Drainage of southern British Columbia south through the mountains
of Washington, Oregon, and California to latitude 33 degrees N near San
Diego.  In the northeastern part of its range it extends east of the
Continential Divide to longitude 110 degrees W in Montana and south to
the Snake River Plain in Idaho [48].


ECOSYSTEMS : 
   FRES20  Douglas-fir
   FRES21  Ponderosa pine
   FRES22  Western white pine
   FRES25  Larch
   FRES26  Lodgepole pine
   FRES28  Western hardwoods
   FRES34  Chaparral - mountain shrub
   FRES36  Mountain grasslands


STATES : 
     CA  HI  ID  MT  NV  OR  WA  BC


ADMINISTRATIVE UNITS : 
     BIHO  CRLA  GLAC  JODA  KICA  LAVO
     LABE  MORA  NOCA  SEQU  WHIS  YOSE


BLM PHYSIOGRAPHIC REGIONS : 
   2  Cascade Mountains
   3  Southern Pacific Border
   4  Sierra Mountains
   5  Columbia Plateau
   7  Lower Basin and Range
   8  Northern Rocky Mountains


KUCHLER PLANT ASSOCIATIONS : 
   K002  Cedar - hemlock - Douglas-fir forest
   K005  Mixed conifer forest
   K010  Ponderosa shrub forest
   K011  Western ponderosa forest
   K012  Douglas-fir forest
   K013  Cedar - hemlock - pine forest
   K034  Montane Chaparral


SAF COVER TYPES : 
   210  Interior Douglas-fir
   211  White fir
   212  Western white pine
   213  Grand fir
   215  Western white pine
   217  Aspen
   218  Lodgepole pine
   228  Western redcedar
   229  Pacific Douglas-fir
   231  Port-Orford-cedar
   233  Oregon white oak
   234  Douglas-fir - tanoak - Pacific madrone
   243  Sierra Nevada mixed conifer
   244  Pacific ponderosa pine - Douglas-fir
   245  Pacific ponderosa pine
   246  California black oak
   247  Jeffrey pine
   248  Knobcone pine
   249  Canyon live oak
   250  Blue oak - Digger pine


SRM (RANGELAND) COVER TYPES : 
NO-ENTRY


HABITAT TYPES AND PLANT COMMUNITIES : 
Pacific ponderosa pine forms climax stands that border grasslands and is
also a common seral tree on many other forested sites [63].  Being
drought tolerant, it is usually occupies the transition zone between
grassland and forest.  Climax stands are characteristically warm and
dry, and occupy lower elevations throughout their range.  Key understory
associates in climax stands typically include grasses such as bluebunch
wheatgrass (Pseudoroegneria spicata) and Idaho fescue (Festuca
idahoensis), and shrubs such as bitterbrush (Purshia tridentata) and
common snowberry (Symphoricarpos albus).  At higher elevations, Pacific
ponderosa pine is seral to trees that are more shade tolerant and
moisture demanding.  In the Pacific Northwest this generally includes
Douglas-fir (Pseudotsuga menziesii), grand fir (Abies grandis), and
white fir (A. concolor) [8,18,49,63].

Publications listing Pacific ponderosa pine as an indicator or dominant
species in habitat types (hts), community types (cts), and plant
associations (pas) are as follows:

 Area            Classification                  Authority
 ----            --------------           -------------------------
  CA              forest (pas)             Atzet & Wheeler 1984
  CA              forest (cts)             Erhard  1979
  CA              forest (hts)             Horton  1960
  ID              forest (pas)             Schlatterer 1972
  ID              forest (cts)             Tuhy & Jensen 1982
c ID              forest (hts)             Steele & others 1981
n ID              forest (hts)             Cooper & others 1991
  MT              forest (hts)             Pfister & others 1977
  OR              forest (pas)             Kovalchik 1987
  OR              forest (pas)             Hopkins 1979b
  OR              forest (pas)             Hopkins & Kovalchik 1983
  OR              forest (pas)             Johnson & Simon 1987
c OR              forest (pas)             Volland 1985
e OR  se WA       forest (cts)             Hall 1973
  WA              forest (pas)             Williams & Lillybridge 1983
e WA  n ID        forest (hts)             Daubenmire & Daubenmire 1968

Related categories for Species: Pinus ponderosa var. ponderosa | Pacific Ponderosa Pine