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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.[clarification needed][2][3]

Quercus obtusata
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fagales
Family: Fagaceae
Genus: Quercus
Subgenus: Quercus subg. Quercus
Section: Quercus sect. Quercus
Species:
Q. obtusata
Binomial name
Quercus obtusata
Bonpl.
Synonyms[1]
List
  • 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.
Wikimedia Commons has media related to Quercus obtusata.

Quercus obtusata is a tree up to 20 metres (66 feet) tall with a trunk sometimes more than 60 centimetres (24 inches) in diameter. The leaves are thick and leathery, up to 22 cm (8+3⁄4 in) long, widely egg-shaped with 3–9 pairs of shallow rounded lobes or undulations.[3][4][5]

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.


References


  1. "Quercus obtusata Bonpl.". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew – via The Plant List.
  2. McVaugh, R. 1974. Flora Novo-Galiciana: Fagaceae. Contributions from the University of Michigan Herbarium 12(1,3): 1–93
  3. 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
  4. Bonpland, Aimé Jacques Alexandre. 1809. Plantae Aequinoctiales 2: 26-27 diagnosis in Latin, description and commentary in French
  5. Bonpland, Aimé Jacques Alexandre. 1809. Plantae Aequinoctiales 2: plate 76 drawing of Quercus obtusata



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