DISTRIBUTION AND OCCURRENCE
SPECIES: Chrysolepis sempervirens | Bush Chinquapin 



GENERAL DISTRIBUTION : 
Bush chinquapin occurs in mountainous regions of California and southern
Oregon.  It is distributed along the Pacific Coast from the San Jacinto
and San Bernadino mountains north through the Coast Ranges to
southwestern Oregon.  Eastward it is distributed through the Sierra
Nevada and Cascade Range to south-central Oregon [9,25,33].  Giant
chinquapin has a shrub form that is difficult to distinguish from bush
chinquapin, and there is some confusion as to the exact distribution of
each [25].


ECOSYSTEMS : 
   FRES20  Douglas-fir
   FRES21  Ponderosa pine
   FRES24  Hemlock - Sitka spruce
   FRES26  Lodgepole pine
   FRES27  Redwood
   FRES28  Western hardwoods
   FRES34  Chaparral - mountain shrub
   FRES35  Pinyon - juniper
   FRES44  Alpine


STATES : 
     CA  OR


ADMINISTRATIVE UNITS : 
     CRLA  KICA  LAVO  SEQU  WHIS  YOSE


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


KUCHLER PLANT ASSOCIATIONS : 
   K002  Cedar - hemlock - Douglas-fir forest
   K003  Silver fir - Douglas-fir forest
   K004  Fir - hemlock forest
   K005  Mixed conifer forest
   K006  Redwood forest
   K007  Red fir forest
   K008  Lodgepole pine - subalpine forest
   K010  Ponderosa shrub forest
   K011  Western ponderosa forest
   K012  Douglas-fir forest
   K013  Cedar - hemlock - pine forest
   K024  Juniper steppe woodland
   K028  Mosaic of K002 and K026
   K029  California mixed evergreen forest
   K030  California oakwoods
   K034  Montane chaparral
   K052  Alpine meadows and barren


SAF COVER TYPES : 
   229  Pacific Douglas-fir
   230  Douglas-fir - western hemlock
   231  Port-Orford-cedar
   232  Redwood
   233  Oregon white oak
   238  Western juniper
   243  Sierra Nevada mixed conifer
   244  Pacific ponderosa pine - Douglas-fir
   245  Pacific ponderosa pine
   246  California black oak
   247  Jeffrey pine
   249  Canyon live oak
   256  California mixed subalpine


SRM (RANGELAND) COVER TYPES : 
NO-ENTRY


HABITAT TYPES AND PLANT COMMUNITIES : 
Bush chinquapin is a common codominant of montane chaparral.  Occurring
at higher elevations than other types of chaparral, montane chaparral
consists of low-growing, often dense thickets of sclerophyllous shrubs
in the coniferous forest zone.  Forest cover is lacking, usually due to
removal of trees by fire or logging [22,23].  Mountain whitethorn
(Ceanothus cordulatus), snowbrush ceanothus (Ceanothus viscidiflorus),
and greenleaf manzanita (Arctostaphylos patula) are frequent codominants
[6,22].  Together these shrubs may form almost impenetrable stands [6].
Bush chinquapin also occurs in pure stands.  These are not extensive in
montane chaparral but are common in alpine zones [11,36].

Bush chinquapin often dominates or codominates the understories of
mid-seral coniferous forests adjacent to montane chaparral [18].
Coniferous forests may also contain scattered thickets of bush
chinquapin on sites unfavorable to conifer growth, such as rocky
outcrops or dry ridges [26].  Bush chinquapin occupies breaks
in the overhead canopy where windthrow or tree death has occurred [8].

On the eastern slope of the Sierra Nevada and Cascade Range, bush
chinquapin is associated with the western juniper (Juniperus
occidentalis)-big sagebrush (Artemesia tridentata)-bluebunch wheatgrass
(Pseudoroegenaria spicata) community of the Great Basin [13,32].

Publications listing bush chinquapin as a dominant or codominant species
are as follows:

California chaparral [18].
Terrestrial natural communities of California [22].
Vegetation types of the San Bernadino Mountains [23].
Vegetation and fire history of a ponderosa pine-white fir forest in
  Crater Lake National Park [31]
A vegetation classification system applied to southern California [36].

Related categories for Species: Chrysolepis sempervirens | Bush Chinquapin