''Quercus obtusata'' is an oak in the white oak group (''Quercus'' sect. ''Quercus'') endemic to Mexico, with a distribution ranging from

San Luis Potosí San Luis Potosí (), officially the Free and Sovereign State of San Luis Potosí ( es, Estado Libre y Soberano de San Luis Potosí), is one of the 32 states which compose the Federal Entities of Mexico. It is divided in 58 municipalities and i ...

and Nayarit south to Oaxaca, 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 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 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