Biology:Quercus obtusata
| Quercus obtusata | |
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Scientific classification 
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| 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
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| Binomial name | |
| Quercus obtusata Bonpl.
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| Synonyms[2] | |
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List
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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.[1][3][4] It is native to the southern Sierra Madre Occidental, Trans-Mexican Volcanic Belt, and Sierra Madre del Sur, where it grows in oak forest, pine–oak forest, and the transition to dry shrubland from 1,240 to 2,630 metres elevation. It is often associated with Quercus crassipes, Q. crassifolia, Q. × dysophylla, Q. laeta, and Q. rugosa.[1]
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.[4][5][6]
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.
Gallery
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Mature leaves -
Bark of a specimen at UC Berkeley Botanic Gardens -
Details of the catkins
References
- ↑ 1.0 1.1 1.2 Jerome, D. (2018). "Quercus obtusata". IUCN Red List of Threatened Species 2018. https://www.iucnredlist.org/species/194208/2304136. Retrieved 10 March 2023.
- ↑ "Quercus obtusata Bonpl.". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens (Kew). http://www.theplantlist.org/tpl1.1/record/kew-174152.
- ↑ McVaugh, R. 1974. Flora Novo-Galiciana: Fagaceae. Contributions from the University of Michigan Herbarium 12(1,3): 1–93
- ↑ 4.0 4.1 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
- ↑ Bonpland, Aimé Jacques Alexandre. 1809. Plantae Aequinoctiales 2: 26-27 diagnosis in Latin, description and commentary in French
- ↑ Bonpland, Aimé Jacques Alexandre. 1809. Plantae Aequinoctiales 2: plate 76 drawing of Quercus obtusata
External links
Wikidata ☰ Q15338535 entry
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