DISTRIBUTION AND OCCURRENCE
SPECIES: Pinus strobiformis | Southwestern White Pine 



GENERAL DISTRIBUTION : 
Southwestern white pine has a limited distribution.  It is found in the
mountains of western Texas, New Mexico, Arizona, and southwestern
Colorado [15,16,50].  It extends south along the mountains to central
Mexico; most of its distribution is in Mexico [44,50,65].


ECOSYSTEMS : 
   FRES21  Ponderosa pine
   FRES23  Fir - spruce


STATES : 
     AZ  CO  NM  TX  MEXICO


ADMINISTRATIVE UNITS : 
     CACA  GUMO  SAGU


BLM PHYSIOGRAPHIC REGIONS : 
    7  Lower Basin and Range
   11  Southern Rocky Mountains
   12  Colorado Plateau
   13  Rocky Mountain Piedmont


KUCHLER PLANT ASSOCIATIONS : 
   K018  Pine - Douglas-fir forest
   K019  Arizona pine forest 
   K020  Spruce - fir - Douglas-fir forest
   K021  Southwestern spruce - fir forest


SAF COVER TYPES : 
   206  Engelmann spruce - subalpine fir
   210  Interior Douglas-fir
   211  White fir
   216  Blue spruce
   217  Aspen
   219  Limber pine
   237  Interior ponderosa pine


SRM (RANGELAND) COVER TYPES : 
NO-ENTRY


HABITAT TYPES AND PLANT COMMUNITIES : 
Southwestern white pine normally occurs in low densities in southwestern
pine, mixed-conifer, and spruce-fir forests [67].  It occurs as an
associate in habitat type series of the major conifers in these forests
[3,4,5,17,26,52].  Southwestern white pine infrequently forms small pure
stands; it is most likely to be dominant in high-elevation, cool
habitats [49,51,53].

Southwestern white pine may be present as a minor component in riparian
community types in south-central Arizona and in the montane riparian
woodland zone of southwestern Colorado [9,70].

Southwestern white pine is listed as an indicator species in the
following publications:

(1)  Classification of the forest vegetation on the National Forests of
       Arizona and New Mexico [5]
(2)  A classification of forest habitat types of northern New Mexico and
       southern Colorado [18]
(3)  Forest habitat types in the Apache, Gila, and part of the Cibola
       National Forests, Arizona and New Mexico [26]
(4)  Forest and woodland habitat types (plant associations) of northern
       New Mexico and northern Arizona [49]
(5)  A classification of spruce-fir and mixed conifer habitat types of
       Arizona and New Mexico [51].

Related categories for Species: Pinus strobiformis | Southwestern White Pine