''Quercus carmenensis'', the Mexican oak, is a tree species native to

Brewster County, Texas Brewster County is a county located in the U.S. state of Texas. It is in West Texas and its county seat (and only city) is Alpine. It is one of the nine counties that comprise the Trans-Pecos region, and borders Mexico. Brewster County is the ...

, and

Coahuila Coahuila (), formally Coahuila de Zaragoza (), officially the Free and Sovereign State of Coahuila de Zaragoza ( es, Estado Libre y Soberano de Coahuila de Zaragoza), is one of the 32 states of Mexico. Coahuila borders the Mexican states of N ...

, Mexico. It grows in pine-oak forests at elevations of . It is a

deciduous In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, aft ...

species with gray bark and red twigs. The

leaves A leaf (plural, : leaves) is any of the principal appendages of a vascular plant plant stem, stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", wh ...

are lanceolate with irregular lobing along the margins.

References

External links

isotype of ''Quercus carmenensis'', photo of herbarium specimen at Missouri Botanical Garden, collected in Coahuila in 1936
{{Taxonbar, from=Q6323361 carmenensis Flora of Coahuila Flora of Texas Plants described in 1937 Oaks of Mexico