Quercus oblongifolia Torr.

Mexican blue oak (en)

Species

Angiosperms > Fagales > Fagaceae > Quercus

Characteristics

Trees , evergreen, to 10 m. Bark gray or whitish, closely furrowed. Twigs light brown, 1-1.5 mm diam., densely or sparsely stellate-tomentose, soon glabrate. Buds reddish brown, subspheric to broadly ovoid, 1-2 mm, glabrous or basal scales pubescent; stipules persistent about terminal buds. Leaves: petiole 2-5(-8) mm. Leaf blade oblong to elliptic, occasionally lanceolate or ovate, (20-)30-60(-80) × (5-)10-25(-30) mm, base cuneate to cordate, margins entire, undulate, sometimes irregularly toothed especially toward apex, secondary veins 7-8(-10) on each side, branched, apex acute or broadly rounded; surfaces abaxially densely and loosely glandular-tomentose, quickly glabrate or persistently floccose, especially about base of midrib, at maturity strongly glaucous, adaxially dull pale green, bluish green, or glaucous, sparsely stellate-tomentose, quickly glabrate. Acorns solitary or paired, subsessile or on peduncle 4-12 mm; cup cup-shaped, about 6-8(-l3) mm deep × 10-13 mm wide, enclosing ca. 1/3 nut, scales to 1-1.5 mm wide, moderately, regularly tuberculate near base of cup, gray-pubescent; nut light brown, ovoid or oblong, 12-17(-19) × (7-)10-12 mm, glabrate or puberulent about apex. Cotyledons connate.
More
A tree.
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality monoecy
Pollination anemogamy
Spread -
Mature width (meter) -
Mature height (meter) 8.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

A common tree of open oak woodlands in foothills, mountain slopes and in canyons, at elevations from 1,500-2,000 metres. A dominant tree within mid-elevation oak woodlands, forming both pure and mixed stands.
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It is a warm temperate to tropical plant.
Light 6-9
Soil humidity 4-7
Soil texture 2-4
Soil acidity 3-7
Soil nutriment -
Hardiness (USDA) 6-8

Usage

The acorns are used for food. The hulls are removed, the acorns parched, and ground into meal and eaten.
Uses dye material medicinal wood
Edible nuts seeds
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by seedlings.
Mode seedlings
Germination duration (days) 120 - 365
Germination temperacture (C°) 10
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -18
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Quercus oblongifolia unspecified picture

Distribution

Quercus oblongifolia world distribution map, present in United States of America

Conservation status

Quercus oblongifolia threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:296514-1
WFO ID wfo-0000292213
COL ID 4R5NG
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Quercus oblongifolia