DISTRIBUTION AND OCCURRENCE
SPECIES: Quercus wislizenii | Interior Live Oak 



GENERAL DISTRIBUTION : 
Interior live oak occurs from Siskiyou and Shasta counties of northern
California south along the foothills of the Sierra Nevada and inner
Coast Ranges into northern Mexico [33,43,47].  It is common near the
coast and on the Channel islands [68].  Interior live oak grows on
approximately 884,000 acres (357,895 ha) in California [10].  The
variety frutescens occurs throughout the mountains of southern
California northward to Lake and Shasta counties.  However, this variety
is uncommon in the Sierra Nevada [40].


ECOSYSTEMS : 
   FRES20  Douglas-fir
   FRES21  Ponderosa pine
   FRES26  Lodgepole pine
   FRES27  Redwood
   FRES28  Western hardwoods
   FRES34  Chaparral - mountain shrub


STATES : 
     CA  MEXICO


ADMINISTRATIVE UNITS : 
     CHIS  KICA  PINN  SAMO  SEQU  WHIS
     YOSE


BLM PHYSIOGRAPHIC REGIONS : 
    1  Northern Pacific Border
    2  Cascade Mountains
    3  Southern Pacific Border
    4  Sierra Mountains


KUCHLER PLANT ASSOCIATIONS : 
   K005  Mixed conifer forest
   K006  Redwood
   K029  California mixed evergreen forest
   K030  California oakwoods
   K033  Chaparral
   K034  Montane chaparral
   K035  Coastal sagebrush
   K037  Mountain mahogany - oak scrub


SAF COVER TYPES : 
   232  Redwood
   234  Douglas-fir - tanoak - Pacific madrone
   237  Interior ponderosa pine
   244  Pacific ponderosa pine - Douglas-fir
   245  Pacific ponderosa pine
   246  California blue oak 
   247  Jeffrey pine
   248  Knobcone pine
   249  Canyon live oak
   250  Blue oak - Digger pine
   255  California coast live oak


SRM (RANGELAND) COVER TYPES : 
   201  Blue oak woodland
   202  Coast live oak woodland
   203  Riparian woodland
   206  Chamise chaparral
   207  Scrub oak mixed chaparral
   208  Ceanothus mixed chaparral
   209  Montane shrubland
   422  Riparian


HABITAT TYPES AND PLANT COMMUNITIES : 
This oak sometimes occurs in dense groves of small, evenly spaced
individuals but also forms shrubby thickets within mixed-conifer forests
[48].  It occurs below the mixed conifer zone in northern oak woodlands
with such species as Oregon white oak (Quercus garryana), blue oak (Q.
douglasii), valley oak (Q. lobata), canyon live oak (Q. chrysolepis),
and gray pine (P. sabiniana) [4,17,27,28,38,65].  Interior live oak is
an important component of certain riparian woodlands of California
[30,51].

Interior live oak is well-represented in oak chaparral or montane
chaparral dominated by such species as Nuttall's scrub oak (Q. dumosa)
[2,4,29,39,53,61].  It also occurs in pinyon (Pinus spp.) woodlands and
in humid conifer forests of the central California coast [10].  The
variety frutescens is most closely associated with fairly xeric
chaparral communities of southern California [11,17,56].

Interior live oak has been included in the following plant associations
and community types:

Vegetation types of the San Gabriel Mountains [29]
Vegetation of the San Bernadino Mountains [39]
A vegetation classification system applied to souther California [44]
The vascular plant communities of California [61]
An introduction to the plant communities of the Santa Ana and San
  Jacinto Mountains [68]

Associated species:  Other conifer or hardwood associates of interior
live oak include coastal live oak (Quercus agrifolia), Douglas-fir
(Pseudotsuga menziesii), Jeffrey pine (Pinus jeffreyi), redwood (Sequoia
sempervirens), ponderosa pine (Pinus ponderosa), cottonwoods (Populus
spp.), tanoak (Lithocarpus densiflorus), and Pacific madrone (Arbutus
menziesii) [2,10,42].  Commonly associated understory species include
manzanita (Arctostaphylos spp.), ceanothus (Ceanothus spp.), birchleaf
mountain-mahogany (Cercocarpus betuloides), hazel (Corylus cornuta),
two-petal ash (Fraxinus dipetala), toyon (Heteromeles arbutifolia),
yerba santa (Eriodycton californicum), redberry (Rhamnus crocea),
chamise (Adenostoma fasciculatum), poison-oak (Toxicodendron
diversiloba), California redbud (Cercis occidentalis), sagebrush
(Artemisia spp.), and rabbitbrush (Chrysothamnus spp.) [17].
Serviceberry (Amelanchier spp.), snowberry (Symphoricarpos spp.),
raspberries (Rubus spp.), and oceanspray (Holodiscus discolor) are
common plant associates in timbered areas [10].

Related categories for Species: Quercus wislizenii | Interior Live Oak