Quercus oblongifolia
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Quercus oblongifolia ( English Arizona blue oak, Blue live oak, Sonoran blue oak ) is a species of the beech family. The evergreen small tree or large shrub belongs to the Quercus section , the so-called "white oaks". The IUCN classifies the species as “not endangered” (“least concern”).
description
Quercus oblongifolia is a small, evergreen tree 5… 8 meters high with a rounded crown. At higher altitudes, it usually grows into a large shrub. The trunk reaches a diameter of up to 50 cm; the bark is light gray and heavily furrowed. The branches are yellowish brown and hairless with reddish brown buds. The leaves are small and long; they stand alternately. They are entire, leathery, bluish green on top and medium green on the underside. The flowers appear in spring at the same time as the old leaves are shed and the new leaves emerge. The male flowers form yellowish green catkins; the female flowers are solitary or in pairs in the leaf axils. The light brown acorns are egg-shaped or elongated, about 2 cm long and sit in scaly spherical cups that make up about a third of their length.
distribution
Quercus oblongifolia grows in high grasslands , canyons and on mesas in Texas , Arizona and New Mexico as well as in northwestern Mexico ( Baja California Sur , Chihuahua , Coahuila , Sinaloa and Sonora ). Quercus oblongifolia is closely related to Quercus engelmannii from southern California. The species are con-specific and could be grouped into one.
habitat
Quercus oblongifolia is common at altitudes between 1,200 and 1,800 meters. It often grows on shallow sandy soils in semi-arid areas. It is the dominant species in lower-lying open oak forests, where it is associated with Quercus arizonica ( English Arizona white oak ) and Quercus emoryi ( English Emory oak ). The species is an important part of pinyon pine - juniper forests, where it lives in community with pines and juniper trees, Vauquelinia californica ( English Arizona rosewood ), Eriogonum wrightii ( English shrubby buckwheat ), Mimosa aculeaticarpa ( English catclaw mimosa emersleyi ), Muhlenberg ( English bullgrass ), Eragrostis intermedia ( English plains lovegrass ), Fendlera rupicola ( English fendlerbush ) and Lycurus phleoides ( English wolftail ) grows.
swell
- WP Cottam. 1982. Oak hybridization at the University of Utah. State Arboretum of Utah.
Individual evidence
- ↑ Quercus oblongifolia . IUCN . 2015.
- ↑ a b c Kevin C. Nixon: Quercus oblongifolia . In: Flora of North America @ eFloras.org . Retrieved June 12, 2019.
- ^ Mexican blue oak . Virginia Tech. Archived from the original on May 9, 2011. Retrieved June 12, 2019.
- ↑ Quercus oblongifolia, 2014 county distribution map . Biota of North America Program. Retrieved June 12, 2019.
- ↑ Quercus oblongifolia Torr. . In: SEINet, Southwestern Biodiversity, Arizona - New Mexico chapter . Retrieved June 12, 2019.
- ↑ a b Diane S. Pavek: Quercus oblongifolia . In: Fire Effects Information System (FEIS) - Index of Species Information . US Forest Service . 1993. Retrieved June 12, 2019.
- ^ Rex D. Pieper, M. Karl Wood, Bruce B. Buchanan: Pinyon-juniper woodlands of New Mexico: a biological and economic appraisal (= Special Report), Volume 73. New Mexico State University, College of Agriculture and Home Economics, Las Cruces, NM 1988, pp. 1-11.
