DISTRIBUTION AND OCCURRENCE
SPECIES: Cercocarpus ledifolius | Curlleaf Mountain-Mahogany 



GENERAL DISTRIBUTION : 
The distribution of curlleaf mountain-mahogany ranges from the Sierra
Nevada and the Cascade Range east to Montana and south to Colorado,
northern Arizona, and Baja California, Mexico [10,12,64].


ECOSYSTEMS : 
   FRES20  Douglas-fir
   FRES21  Ponderosa pine
   FRES23  Fir-spruce
   FRES26  Lodgepole pine
   FRES28  Western hardwoods
   FRES29  Sagebrush
   FRES34  Chaparral-mountain shrub
   FRES35  Pinyon-juniper


STATES : 
     AZ  CA  CO  ID  MT  NV  OR  UT  WA  WY
     MEXICO


ADMINISTRATIVE UNITS : 
     BICA  BRCA  CANY  CEBR  COLM  DEVA
     DINO  GRBA  JODA  LAVO  LABE  NABR
     SEQU  YOSE  ZION


BLM PHYSIOGRAPHIC REGIONS : 
    1  Northern Pacific Border
    2  Cascade Mountains
    3  Southern Pacific Border
    4  Sierra Mountains
    5  Columbia Plateau
    6  Upper Basin and Range
    7  Lower Basin and Range
    8  Northern Rocky Mountains
    9  Middle Rocky Mountains
   10  Wyoming Basin
   11  Southern Rocky Mountains
   12  Colorado Plateau
   16  Upper Missouri Basin and Broken Lands


KUCHLER PLANT ASSOCIATIONS : 
   K008  Lodgepole pine-subalpine forest
   K010  Ponderosa shrub forest
   K011  Western ponderosa forest
   K012  Douglas-fir forest
   K015  Western spruce-fir forest
   K018  Pine-Douglas-fir forest
   K019  Arizona pine forest 
   K020  Spruce-fir-Douglas-fir forest
   K021  Southwestern spruce-fir forest
   K022  Great Basin pine forest
   K023  Juniper-pinyon woodland
   K024  Juniper steppe woodland
   K037  Mountain-mahogany-oak scrub
   K038  Great Basin sagebrush
   K055  Sagebrush steppe


SAF COVER TYPES : 
   206  Engelmann spruce-subalpine fir
   208  Whitebark pine
   209  Bristlecone pine
   210  Interior Douglas-fir
   211  White fir
   213  Grand fir
   217  Aspen
   218  Lodgepole pine
   219  Limber pine
   220  Rocky Mountain juniper
   237  Interior ponderosa pine
   238  Western juniper
   239  Pinyon-juniper
   240  Arizona cypress
   241  Western live oak
   247  Jeffrey pine


SRM (RANGELAND) COVER TYPES : 
   104  Antelope bitterbrush-bluebunch wheatgrass
   105  Antelope bitterbrush-Idaho fescue
   107  Western juniper/big sagebrush/bluebunch wheatgrass
   109  Ponderosa pine shrubland
   209  Montane shrubland
   210  Bitterbrush
   314  Big sagebrush-bluebunch wheatgrass
   315  Big sagebrush-Idaho fescue
   317  Bitterbrush-bluebunch wheatgrass
   318  Bitterbrush-Idaho fescue
   319  Bitterbrush-rough fescue
   322  Curlleaf mountain-mahogany-bluebunch wheatgrass
   401  Basin big sagebrush
   402  Mountain big sagebrush
   404  Threetip sagebrush
   406  Low sagebrush
   409  Tall forb
   412  Juniper-pinyon woodland
   413  Gambel oak
   415  Curlleaf mountain-mahogany
   416  True mountain-mahogany
   417  Littleleaf mountain-mahogany
   420  Snowbrush
   421  Chokecherry-serviceberry-rose
   504  Juniper-pinyon pine woodland
   509  Transition between oak-juniper woodland and mahogany-oak association


HABITAT TYPES AND PLANT COMMUNITIES : 
Curlleaf mountain-mahogany occurs throughout the Rocky Mountains and
Intermountain West in shrub ecotones or mountain brush communities, in
open forests, on ridgetops, and on rock outcrops [4,5,9,33,52].
Curlleaf mountain-mahogany usually occurs in isolated, pure patches that
are often very dense.  In the Great Basin, curlleaf mountain-mahogany
may form a distinct belt on mountain slopes and ridgetops above
pinyon-juniper woodland [9,33,52].

In the Rocky Mountain Region, curlleaf mountain-mahogany is associated
with skunkbush sumac (Rhus trilobata), antelope bitterbrush (Purshia
tridentata), serviceberry (Amelanchier spp.), and western juniper
(Juniperus occidentalis) [14].  As a codominant member of the
sagebrush-forest ecotone in Idaho, curlleaf mountain mahogany is
associated with snowberry (Symphoricarpos spp.), mountain big sagebrush
(Artemisia tridentata ssp. vaseyana), green rabbitbrush (Chrysothamnus
viscidiflorus), bluebunch wheatgrass (Pseudoroegneria spicata), Sandberg
bluegrass (Poa secunda), Idaho fescue (Festuca idahoensis), and Columbia
needlegrass (Stipa columbiana) [47].

Curlleaf mountain-mahogany occurs in mid-elevation forests that do not
develop dense canopies.  It is commonly associated with limber pine
(Pinus flexilis), lodgepole pine (P. contorta), ponderosa pine (P.
ponderosa), Douglas-fir (Pseudotsuga menziesii), Englemann spruce (Picea
engelmannii), subalpine fir (Abies lasiocarpa), and white fir (A.
concolor) [4,5,10,33]; it may also occur with quaking aspen (Populus
tremuloides) and whitebark pine (Pinus albicaulus) above 9,000 feet in
the Great Basin [33].  In Utah curlleaf mountain-mahogany is associated
with maple (Acer spp.)-oak (Quercus spp.) woodlands [5].

Publications listing curlleaf mountain-mahogany as a dominant or
codominant species include:
	
  Habitat characteristics of the Silver Lake mule deer range [11]
  Sagebrush-grass habitat types of southern Idaho [22] 
  Preliminary descriptions of the terrestrial natural communities of
    California [23]
  Plant associations of the Fremont National Forest [24]
  Plant associations of the Wallowa-Snake Province: Wallowa-Whitman
    National Forest [28]
  Flora and major plant communities of the Ruby-East Humboldt Mountains
    with special emphasis on Lamoille Canyon [36]
  Grassland and shrubland habitat types of western Montana [41]
  Forest habitat types of the South Warner Mountains, Modoc County,
    California [46]
  Forest habitat types of central Idaho [53]
  Coniferous forest habitat types of central and southern Utah [63]

Related categories for Species: Cercocarpus ledifolius | Curlleaf Mountain-Mahogany