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Quercus austrina

Common Name(s):

Phonetic Spelling
KWER-kus oss-TRY-nuh
This plant has low severity poison characteristics.
See below
Description

Bluff Oak is a native, deciduous oak tree found along the southeast USA from North Carolina south into Florida and west into Mississippi. It naturally occurs on well-drained, rich bottomland soils along streams and on river bluffs. It is becoming endangered in some areas. The genus name, Quercus, is the Latin name for oak trees.

It is small for an oak tree and the open rounded crown makes it a great shade tree. The fall colors are showy and the numerous acorns are loved by wildlife. 

Bluff Oak should be grown in full sun on well-drained soil and has good drought tolerance but is not salt tolerant. This tree can also tolerate periotic flooding and does well along streams or ponds. Grow a shade tree, along roads or in parks as it tolerates urban conditions well. Bluff oak compartmentalizes injuries protecting itself from decay.

Insects, Diseases, and Other Plant Problems: Insects, Diseases, or Other Plant Problems:  Numerous insect and disease pests, but the damage is rarely significant. Susceptible to oak wilt, anthracnose, cankers, leaf spots, powdery mildew, and oak leaf blister. Potential pests include scales, oak skeletonizers, leaf miners, aphids, galls, orangestriped oakworm, buck moth, whitemarked tussock moth, and lace bugs. Chlorosis can occur if the pH in the soil is too high, resulting in iron deficiency. 

The many varieties of Quercus serve as host plants for the larvae of the Imperial moth (Eacles imperialis) as well as a wide variety of butterflies, such as Banded hairstreak (Satyrium calanus)Edward's hairstreak (Satyrium edwardsii)Gray hairstreak (Strymon melinus)White-m hairstreak (Parrhasius malbum)Horace's duskywing (Erynnis horatius), and Juvenal's duskywing (Erynnis juvenalis).

The Clemson Cooperative Extension Home and Garden Information Center has a factsheet on common pests and insects. 

See this plant in the following landscape:
Cultivars / Varieties:
Tags:
#shade tree#full sun tolerant#native tree#moth caterpillar host#street tree#squirrel friendly#NC native#acorns#nighttime garden#oak tree#pollinator plant#larval host plant#deciduous tree#butterfly friendly#problem for horses#banded hairstreak butterfly#gray hairstreak butterfly#imperial moth#juvenal’s duskywing butterfly#edward’s hairstreak butterfly#white-m hairstreak butterfly#horace’s duskywing butterfly#butterfly caterpillar host#wildlife friendly
 
Cultivars / Varieties:
Tags:
#shade tree#full sun tolerant#native tree#moth caterpillar host#street tree#squirrel friendly#NC native#acorns#nighttime garden#oak tree#pollinator plant#larval host plant#deciduous tree#butterfly friendly#problem for horses#banded hairstreak butterfly#gray hairstreak butterfly#imperial moth#juvenal’s duskywing butterfly#edward’s hairstreak butterfly#white-m hairstreak butterfly#horace’s duskywing butterfly#butterfly caterpillar host#wildlife friendly
  • Attributes:
    Genus:
    Quercus
    Species:
    austrina
    Family:
    Fagaceae
    Life Cycle:
    Woody
    Recommended Propagation Strategy:
    Seed
    Country Or Region Of Origin:
    SE North America
    Distribution:
    From Mississippi to the Carolinas
    Wildlife Value:
    Acorns attract squirrels and other mammals. Oak trees support a wide variety of Lepidopteran. You may see Imperial Moth (Eacles imperialis) larvae which have one brood per season and appear from April-October in the south. Adult Imperial Moths do not feed. Banded Hairstreak (Satyrium calanus), which have one flight from June-August everywhere but Florida where they emerge April-May. Edward's Hairstreak (Satyrium edwardsii), has one flight from May-July in the south and June-July in the north. Gray Hairstreak (Strymon melinus), has three to four flights in the south from February-November and two flights in the north from May-September. White-M Hairstreak (Parrhasius m-album) has three broods in the north from February-October. Horace’s Duskywing (Erynnis horatius) has three broods in Texas and the deep south from January-November, and two broods in the north from April-September. Juvenal’s Duskywing (Erynnis juvenalis) has one brood from April-June, appearing as early as January in Florida.
    Edibility:
    Acorns are edible if tannins are leached or boiled out.
    Dimensions:
    Height: 45 ft. 0 in. - 60 ft. 0 in.
    Width: 35 ft. 0 in. - 50 ft. 0 in.
  • Whole Plant Traits:
    Plant Type:
    Native Plant
    Perennial
    Tree
    Woody Plant Leaf Characteristics:
    Deciduous
    Habit/Form:
    Open
    Oval
    Rounded
    Growth Rate:
    Medium
    Maintenance:
    Medium
    Texture:
    Medium
  • Cultural Conditions:
    Light:
    Full sun (6 or more hours of direct sunlight a day)
    Soil Texture:
    Clay
    Loam (Silt)
    Sand
    Soil pH:
    Acid (<6.0)
    Soil Drainage:
    Good Drainage
    Moist
    Occasionally Wet
    Available Space To Plant:
    24-60 feet
    NC Region:
    Coastal
    USDA Plant Hardiness Zone:
    8a, 8b, 9a, 9b
  • Fruit:
    Fruit Color:
    Brown/Copper
    Gray/Silver
    Display/Harvest Time:
    Fall
    Fruit Type:
    Nut
    Fruit Length:
    < 1 inch
    Fruit Width:
    < 1 inch
    Fruit Description:
    The .5 to 1-inch brown acorns are oval and solitary or paired. They are 1/3 to 1/2 covered with a gray scaly cap. Matures in 1 year.
  • Flowers:
    Flower Color:
    Brown/Copper
    Gold/Yellow
    Flower Inflorescence:
    Catkin
    Insignificant
    Flower Bloom Time:
    Spring
    Flower Description:
    Yellow-brown male catkins
  • Leaves:
    Woody Plant Leaf Characteristics:
    Deciduous
    Leaf Color:
    Gray/Silver
    Green
    Leaf Value To Gardener:
    Showy
    Deciduous Leaf Fall Color:
    Brown/Copper
    Gold/Yellow
    Orange
    Leaf Type:
    Simple
    Leaf Arrangement:
    Alternate
    Leaf Shape:
    Elliptical
    Obovate
    Leaf Margin:
    Entire
    Lobed
    Sinuate
    Hairs Present:
    Yes
    Leaf Length:
    > 6 inches
    Leaf Width:
    3-6 inches
    Leaf Description:
    4-8 inch long and 2-4 inch wide leaves are narrow with shallow, rounded, irregular lobes or can be sinuate. Green to gray-green color with secondary veins on each side. Young leaves will have hairs and mature leaves do not. Fall color is copper, orange or yellow.
  • Bark:
    Bark Color:
    Light Gray
    Surface/Attachment:
    Ridges
    Bark Description:
    The bark is scaly, pale gray and contains broad ridges.
  • Stem:
    Stem Is Aromatic:
    No
    Stem Buds:
    Hairy
    Stem Bud Terminal:
    Cluster of terminal buds
    Stem Lenticels:
    Conspicuous
    Stem Description:
    Branchlets are dark brown, with prominent, corky, whitish lenticels. Buds are dark brown, pointed and pubescent.
  • Landscape:
    Landscape Location:
    Lawn
    Meadow
    Naturalized Area
    Pond
    Landscape Theme:
    Butterfly Garden
    Native Garden
    Nighttime Garden
    Pollinator Garden
    Design Feature:
    Shade Tree
    Specimen
    Street Tree
    Attracts:
    Butterflies
    Moths
    Pollinators
    Small Mammals
    Resistance To Challenges:
    Deer
    Drought
    Problems:
    Messy
    Problem for Horses
  • Poisonous to Humans:
    Poison Severity:
    Low
    Poison Symptoms:
    Abdominal pain, constipation then diarrhea (occasionally bloody), depression, frequent urination, discolored urine, jaundice; acorns can obstruct the digestive tract
    Poison Toxic Principle:
    Gallotannins, quercitrin, and quercitin.
    Causes Contact Dermatitis:
    No
    Poison Part:
    Fruits
    Leaves