Lady Bird Johnson Wildflower Center - The University of Texas at Austin information

 Native Plant Database

Quercus buckleyi


Texas red oak, Buckley oak, Spanish oak, Spotted Oak, Rock Oak


Fagaceae (Beech Family)



Quercus buckleyi (Texas red oak)
Marcus, Joseph A.
Small to medium tree to 15 m (50 ft) tall. Bark dark gray, smoothish, furrowed into ridges on lower trunk and older branches. Twigs slender, grayish or brownish, glabrous, ending in a cluster of small egg-shaped grayish or brownish buds. Leaves alternate, elliptical or obovate, 6-12 cm (2.4-4.8 in) long and 5-10 cm (2-4 in) wide,deeply divided into 5-9 (usually 7) lobes which are usually broadest toward the tip and end in several bristle-tipped teeth, shiny dark green above, pale green with tufts of hairs in vein axils below, turning brown or red in fall. Fruits are acorns maturing in the second year, egg-shaped, 12-18 mm (0.5-0.7 in) long and 8-14 mm (0.3-0.6 in) wide with a more or less shallow cup covering 1/3-1/2.

This species was named for Samuel B. Buckley, botanist and state geologist of Texas. Buckley oak leaves are similar to the Texas red oak, Q. texana, but the two species do not overlap in their distributions. This species should be considered a conservation concern. The largest known Buckley oak grows in Travis County, Texas.

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Plant Characteristics

Duration: Perennial
Habit: Tree
Root Type: Tap
Leaf Retention: Deciduous
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Shape: Elliptic , Obovate
Leaf Venation: Pinnate
Leaf Margin: Lobed
Leaf Apex: Acuminate , Acute
Leaf Base: Truncate
Breeding System: Flowers Unisexual , Monoecious
Inflorescence: Catkin
Fruit Type: Nut
Size Notes: Height to 75 ft. Width to 60 ft.
Leaf: Glossy green above, light green to coppery-green below
Autumn Foliage: yes
Fruit: Acorns biennial; cup scales smooth to sparsely pubescent, inner surface smooth, covers 1⁄3 - 1⁄2 of nut; smooth or slightly pubescent, broadly ovoid nut, 3⁄4 inch (19 mm) long.
Size Class: 36-72 ft.

Bloom Information

Bloom Color: Red
Bloom Time: Mar , Apr , May , Jun

Distribution

USA: KS , OK , TX
Native Distribution: Native to an area from southcentral Texas to northcentral Oklahoma.
Native Habitat: Restricted habitat associated with limestone ridges, slopes and creek bottoms.

Growing Conditions

Water Use: Low
Light Requirement: Sun , Part Shade
Soil Moisture: Dry
Soil pH: Alkaline (pH>7.2)
CaCO3 Tolerance: High
Cold Tolerant: yes
Heat Tolerant: yes
Soil Description: Medium Loam, Clay Loam, Clay, Limestone-based
Conditions Comments: Q. buckleyi is more drought tolerant than the Shumard oak, but less hardy. This tree tolerates alkaline soil as well as neutral and slightly acidic soil. It is a super shade tree if you do not mind raking leaves in the fall. Red or yellow foliage in the fall.

Benefit

Use Ornamental: Fall conspicuous, Attractive, Color
Use Wildlife: Produces large numbers of acorns, which are valuable as food for wildlife.
Use Other: Texas oak is usually too small for sawlogs.
Warning: Leaves and acorns can be toxic to animals if eaten. Humans should generally avoid ingesting plants that are toxic to animals.
Interesting Foliage: yes
Deer Resistant: No

Last Update: 2011-09-24