DISTRIBUTION AND OCCURRENCE
SPECIES: Pinus quadrifolia | Parry Pinyon 



GENERAL DISTRIBUTION : 
Parry pinyon is the most widespread coniferous tree in northern Baja
California [21].  It is mainly a Mexican species, growing in the Sierra
de Juarez and Sierra San Pedro Martir.  In the United States, Parry
pinyon occurs in California.  Several stands of Parry pinyon grow in
southeastern San Diego County, and in the southwest corner of Imperial
County, close to the Mexican border.  A small population of Parry pinyon
grows in south-central Riverside County, 30 miles (50 km) from the main
distribution [34].  Ranges of singleleaf pinyon and Parry pinyon overlap
in southwestern California and northern Baja California [7].  


ECOSYSTEMS : 
   FRES34  Chaparral - mountain shrub
   FRES35  Pinyon - juniper


STATES : 
     CA  MEXICO


ADMINISTRATIVE UNITS : 
NO-ENTRY


BLM PHYSIOGRAPHIC REGIONS : 
    3  Southern Pacific Border
    7  Lower Basin and Range


KUCHLER PLANT ASSOCIATIONS : 
   K023  Juniper - pinyon woodland
   K033  Chaparral


SAF COVER TYPES : 
   239  Pinyon - juniper
   249  Canyon live oak


SRM (RANGELAND) COVER TYPES : 
NO-ENTRY


HABITAT TYPES AND PLANT COMMUNITIES : 
Parry pinyon is a dominant member of the pinyon-juniper woodland of
southern California and northern Baja California.  California juniper
(Juniperus californica) commonly codominates with Parry pinyon [11]. In
the mountains of northern Baja California, Parry pinyon is associated
with pine-oak (Pinus-Quercus spp.) woodlands and typical California
chaparral [32,33].  On the western flank of the interior Sierra de
Juarez, Parry pinyon forms scattered groves within relatively dense
chaparral of chamise (Adenostoma fasciculatum) and red shank (A.
sparsifolium).  Along the crest and eastern rim of the Sierra de Juarez
it forms continuous forests with desert chaparral species such as
peninsular manzanita (Arctostaphylos peninsularis) [21].

A classifications listing Parry pinyon as a dominant species is:
           
Woodland classification: the pinyon-juniper formation [11].   
      
Common plant associates not previously mentioned include Coulter pine
(Pinus coulteri), Jeffrey pine (P. jeffreyi), and interior live oak (Q.
wislizeni) [15,21,23].

Related categories for Species: Pinus quadrifolia | Parry Pinyon