Name: Quercus grisea Liebm 1854 (Q.grisea is actually a complex of two species : 1. Q.grisea Liebmann = gray oak, mountain white oak ; the type described below; the specimen named Q.endemica C.H.Muller 1937 are actually identical; several hybrids with : Q.gambelii, Q.mohriana, Q.arizonica, Q.turbinella; 2. Q.arizonica Sargent 1895 (Oaks of the World.Free.Fr) (1)
Synonyms: Quercus undulata
Torr. var. grisea (Liebm.) Engelm. 1877, Quercus oblongifolia Coult., not Torr. 1853,
nor R.Br. ter 1871
Local Names: Scrub
oak, Gray oak , Mountain white oak, Mexican Blue Oak
Acorn: The acorn measures
1.2-2 cm long; singly or paired; short peduncle 0-1.5 cm long; cup scaly, half-round,
glabrous, enclosing 1/3 to 1/2 of nut; maturing in 1 year; cotyledons connate;(1)
Leaves: 2-8
x 1-4 cm; semi-evergreen; oval elliptic; entire; thick, stiff; margin rolled under,
sometimes some mucronate teeth; base rounded, apex pointed; glaucous grey above
with scattered stellate hairs; hairy beneath (with 4-11 rayed spreading trichomes);
6-10 vein pairs; petiole pubescent, 3-10 mm long;(1)
Range: Limited distribution overall, gray oak is relatively common
in the Trans-Pecos area of Texas [50]. Its range extends from Texas
westward into the mountains of central and southern New Mexico [48].
Gray oak is less common in central and southeastern Arizona [35,60].
The scattered populations of gray oak in northern Mexico extend
southward to Durango and westward from Coahuila to Sonora (http://www.fs.fed.us/database/feis/plants/tree/quegri/all.html) See Map. (2) (3)
References: (1) (2) (3)
Additional information and links on the genus Quercus:
Plants List: Quercus
Oaks of The World
Quercus images on Google
Oak images on Google
List of genus Quercus and subgenus Cyclobalanopsis
USDA Plant List Search: (Type Quercus)
eFlora - Quercus
