Quercus obtusata

{{Short description|Species of oak tree}}

{{Speciesbox

| image = Quercus obtusata in Hackfalls Arboretum (2).jpg

| genus = Quercus

| display_parents = 2

| parent = Quercus sect. Quercus

| species = obtusata

| authority = Bonpl.

| synonyms_ref = {{ThePlantList |id=kew-174152 |taxon=Quercus obtusata |authority=Bonpl.}}

| synonyms = {{collapsible list|bullets = true

|Quercus alvarezensis Trel.

|Quercus atriglans E.F.Warb.

|Quercus crenatifolia Trel.

|Quercus hartwegii Benth.

|Quercus hartwegii f. glabrata Trel.

|Quercus obtusata var. hartwegii (Benth.) A.DC.

|Quercus obtusata var. pandurata (Bonpl.) A.DC.

|Quercus pandurata Bonpl.

|Quercus pandurata var. hartwegii (Benth.) Wenz.

|Quercus panduriformis Trel.

|Quercus panduriformis f. colimensis Trel.

|Quercus panduriformis f. rubrinervis Trel.

|Quercus spicata Bonpl.

}}

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Jerome, D.|date=2018|title=Quercus obtusata |volume=2018|url=https://www.iucnredlist.org/species/194208/2304136 |access-date=10 March 2023}}

}}

{{Commons category|Quercus obtusata}}

Quercus obtusata is an oak in the white oak group (Quercus sect. Quercus) endemic to Mexico, with a distribution ranging from San Luis Potosí and Nayarit south to Oaxaca, from 620 to 2800 MSL.{{Clarify|reason=Units not clearly stated|date=April 2022}}[https://www.biodiversitylibrary.org/item/46657#page/3/mode/1up McVaugh, R. 1974. Flora Novo-Galiciana: Fagaceae. Contributions from the University of Michigan Herbarium 12(1,3): 1–93][https://www.biodiversitylibrary.org/item/87374#page/565/mode/1up 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 {{Convert|20|m|abbr=off}} tall with a trunk sometimes more than {{Convert|60|cm|abbr=off}} in diameter. The leaves are thick and leathery, up to {{Convert|22|cm|abbr=on|frac=4}} long, widely egg-shaped with 3–9 pairs of shallow rounded lobes or undulations.[https://www.biodiversitylibrary.org/page/279134#page/57/mode/1up Bonpland, Aimé Jacques Alexandre. 1809. Plantae Aequinoctiales 2: 26-27] diagnosis in Latin, description and commentary in French[https://www.biodiversitylibrary.org/page/279134#page/58/mode/1up 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.