''Quercus obtusata'' is an oak in the white oak group (''Quercus'' sect. ''Quercus'')

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...

, with a distribution ranging from San Luis Potosí and Nayarit south to

Oaxaca Oaxaca, officially the Free and Sovereign State of Oaxaca, is one of the 32 states that compose the political divisions of Mexico, Federative Entities of the Mexico, United Mexican States. It is divided into municipalities of Oaxaca, 570 munici ...

, from 620 to 2800 MSL.Romero Rangel, S., E. C. Rojas Zenteno & M. L. Aguilar Enríquez. 2002. El género ''Quercus'' (Fagaceae) en el estado de México. Annals of the Missouri Botanical Garden 89(4): 551–593
in Spanish, with line drawings of each species ''Quercus obtusata'' is a tree up to tall with a trunk sometimes more than in diameter. The leaves are thick and leathery, up to long, widely egg-shaped with 3–9 pairs of shallow rounded lobes or undulations.Bonpland, Aimé Jacques Alexandre. 1809. Plantae Aequinoctiales 2: plate 76
drawing of ''Quercus obtusata'' Resembles '' Q. potosina'', which has smaller leaves (3–10 x 2–6 cm); also resembles '' Q. rugosa'', this one has a convex leaf strongly coriaceous, a revolute margin, the epidermis bullate; at least, one can differentiate ''Q. obtusata'' from '' Q. laeta'', which has foliar underside glaucous, without masses of glandular secretions, none or rare glandular trichomes, a leaf more oblong than oboval with a margin sometimes entire.

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photo of herbarium specimen at Missouri Botanical Garden, collected in México State in 1934
obtusata Endemic oaks of Mexico Plants described in 1809 Taxa named by Aimé Bonpland {{Quercus-stub