DISTRIBUTION AND OCCURRENCE
SPECIES: Quercus emoryi | Emory Oak 



GENERAL DISTRIBUTION : 
The range of Emory oak extends from central Arizona eastward through
southern New Mexico into western Texas [23,57,64,96,104].  Its range
continues southward through northern Mexico from Chihuahua west to
Sonora and south to Durango [35,48,96,103].


ECOSYSTEMS : 
   FRES20  Douglas-fir
   FRES21  Ponderosa pine
   FRES28  Western hardwoods
   FRES35  Pinyon - juniper


STATES : 
     AZ  NM  TX  MEXICO


ADMINISTRATIVE UNITS : 
     BIBE  CHIR  CORO  FOBO  SAGU


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


KUCHLER PLANT ASSOCIATIONS : 
   K018  Pine - Douglas-fir forest
   K019  Arizona pine forest 
   K023  Juniper - pinyon woodland
   K031  Oak - juniper woodlands


SAF COVER TYPES : 
   210  Interior Douglas-fir
   235  Cottonwood - willow
   237  Interior ponderosa pine
   239  Pinyon - juniper
   240  Arizona cypress
   241  Western live oak


SRM (RANGELAND) COVER TYPES : 
NO-ENTRY


HABITAT TYPES AND PLANT COMMUNITIES : 
Emory oak occurs in many communities along diverse elevational and
moisture gradients from pine-oak (Pinus spp.-Quercus spp.), Madrean
evergreen, and open oak woodlands to interior chaparral, semidesert
grasslands, and savannas [15,32,67,78,123].

Emory oak is a codominant or subdominant species in all community types
of the pine-oak woodlands of higher elevations [8,27,85].  It is an
indicator species in ponderosa pine (Pinus ponderosa), Apache pine (P.
engelmannii), and Chihuahua pine (P. leiophylla var. chihuahuana) habitat
types and border pinyon (P. discolor) community types [1,76,82,116].

In pinyon-juniper (Pinus spp.-Juniperus spp.) woodlands, Emory oak is a
codominant or an indicator species [17,47,51,74,80].  It is an important
understory species in pinyon-juniper stands [94].

Emory oak is dominant or codominant with Arizona white oak (Q.
arizonica), Mexican blue oak (Q. oblongifolia), and juniper in Madrean
evergreen and open oak woodland series [6,16,42,79,85,98].  Emory oak is
the most characteristic tree of encinal or oak woodlands in the border
region of Mexico and the United States [57,64,66].  In the Chihuahuan
Desert, Emory oak is codominant with gray oak (Q. grisea), Graves oak,
and Mexican pinyon (Pinus cembroides) [24,46,116].

Emory oak is occasionally present in the interior chaparral as a
subdominant shrub or as one of the taller evergreen oaks.  These
interior chaparral communities occur discontinuously and extend into the
wetter Madrean evergreen woodland [40,58,59,91,124].

Emory oak, gray oak, and Chisos oak (Q. chisoensis) form savannas at the
periphery of grama (Bouteloua spp.)-bluestem (Andropogon spp.)
associations [30,32].  Emory oak is a minor species in open savannas of
velvet mesquite (Prosopis velutina)-turpentine bush (Ericameria
laricifolia)-burroweed (Isocoma tenuisecta) associations [122].

Emory oak is known as an upland species but also occurs in riparian
associations.  It is a codominant to infrequent tree in Arizona sycamore
(Platanus wrightii) and Arizona walnut (Juglans major) community types
[61,65,112,115].  Emory oak occurs in mixed broadleaf community and
vegetation types with Arizona cypress (Cupressus arizonica) [98].

Some of the publications in which Emory oak is listed as a dominant or
indicator species are:

(1)  Classification of the forest vegetation on the National Forests of
       Arizona and New Mexico [1]
(2)  Forest and woodland habitat types (plant associations) of Arizona
       south of the Mogollon Rim and southwestern New Mexico [6]
(3)  Forest habitat types south of the Mogollon Rim, Arizona and New
       Mexico [31]
(4)  Classification of mixed broadleaf riparian forest in Tonto
       National Forest [61]
(5)  A forest habitat type classfication of southern Arizona and its
       relationship to forests of the Sierra Madre Occidental of Mexico [82]
(6)  Plant communities of Texas (Series level): February 1992 [116].

Succulent species associated with Emory oak but not previously mentioned
in Distribution and Occurrence include Echinocereus ledingii,
Mammillaria viridiflora, and Opuntia spinosior [56].

Related categories for Species: Quercus emoryi | Emory Oak