Plant Profile: Quercus incana

Taxonomy: Quercus incana

Names

Bluejack Oak, Cinnamon Oak, Oaks, Sandjack Oak, Shin Oak, Turkey Oak

  • Photo of Quercus incana (Quercus incanas)

Phonetic Spelling:KWER-kus in-KAN-nuh

Genus:Quercus

Species:incana

Family:Fagaceae

The Bluejack Oak is a large shrub or small tree that forms dense thickets, characterized by its blue-green foliage. It thrives in the coastal and Piedmont regions of North Carolina, preferring well-drained sandy soils found in barrens, ridges, and shaded woodlands across the Atlantic and Gulf coastal plains of the United States, extending from Virginia down to Florida and as far west as Texas, Oklahoma, and Arkansas.

This tree features a short trunk with crooked branches that create an open, irregular crown. It produces acorns every other year, which are a favorite among local wildlife. While the blue-green leaves are visually appealing, they do not change color in the fall. Typically, it grows in a shrub-like form, reaching heights of around 20 feet.

The Bluejack Oak is well-suited for drought conditions and flourishes in well-drained soils, thriving in full sun to partial shade. Its relatively small stature makes it an ideal shade tree for smaller yards, while still offering a refuge for various wildlife species.

Quercus incana Feature Summary

Quercus incana Image Gallery

Tags

#showy flowers
#deciduous
#small tree
#shade tree
#full sun tolerant
#shrub
#wildlife plant
#partial sun
#small shrub
#native tree
#moths
#tree
#shade shrub
#spring flowers
#attracts squirrels
#small mammals
#food source
#NC native
#racoons
#nighttime garden
#blue-green leaves
#glossy leaves
#leathery leaves
#larval host plant
#food source winter
#food source fall
#sandhills
#food source herbage
#sandy soils tolerant
#loamy soils tolerant
#bird friendly
#dry soils tolerant
#food source hard mast fruit
#mammals
#butterfly friendly
#butterfly larvae
#moth larvae
#partial shade tolerant
#larval host tree
#pollinator garden
#problem for horses
#audubon
#banded hairstreak butterfly
#gray hairstreak butterfly
#imperial moth
#juvenal’s duskywing butterfly
#edward’s hairstreak butterfly
#white-m hairstreak butterfly
#horace’s duskywing butterfly

Similar Plants

Quercus incana is often confused with:

Quercus incana Feature Summary

Attributes
Southeastern U.S.A to TX
AL, AR, FL, GA, LA, MS, NC, OK, SC, TX, VA
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. Acorns provide food for birds, squirrels, raccoons, and deer.
Acorns (nuts) are edible after tannins are leached or boiled out.
Wildlife Food Source
Fruit
Biennial round acorns are 1/2 inch, brown with light stripes, red-brown scales on the cup that covers half the nut.
Brown/Copper
Flowers
Male flowers are drooping yellowish-red catkins in spring. Female flowers are produced singly or in pairs on short stalks.
Gold/Yellow
Green
Insignificant
Catkin
Leaves
Thick leathery, glossy, blue-green with short hairy petiole, base acute to rounded, apex acute with a bristle on the tip. Undersides veins are prominent blue-green and hairy. Leaves are tardily deciduous often remain on the tree late into the year. 2-4 inches long and 1/2 to 1 inch wide.
Green
Blue
Elliptical
Ovate
1-3 inches
Glossy
Leathery
< 1 inch
Bark
Thick, dark gray to black furrowed with square plates
Dark Gray
Black
Stem
Red-brown buds, oval with hairy scales, brown twigs 5-angled hairy when young.
Brown/Copper
Red/Burgundy
Hairy (pubescent)
Straight
Cluster of terminal buds
Poisonous to Humans
Abdominal pain, constipation then diarrhea (occasionally bloody), depression, frequent urination, discolored urine, jaundice; acorns can obstruct the digestive tract
Whole Plant Traits
Shrub
Tree
Native Plant
Spreading
Open
Irregular
Medium
Cultural Conditions
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Acid (<6.0)
Good Drainage
Very Dry
Coastal
Piedmont
Loam (Silt)
Sand
Landscape
Butterfly Garden
Pollinator Garden
Nighttime Garden
Shade Tree
Small Tree
Butterflies
Pollinators
Songbirds
Moths
Small Mammals
Problem for Horses

Quercus incana Attributes

Quercus incana: Country Or Region Of Origin

Southeastern U.S.A to TX

Quercus incana: Distribution

AL, AR, FL, GA, LA, MS, NC, OK, SC, TX, VA

Quercus incana: Wildlife Value

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. Acorns provide food for birds, squirrels, raccoons, and deer.

Quercus incana: Edibility

Acorns (nuts) are edible after tannins are leached or boiled out.

Quercus incana: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Quercus incana: Play Value

Attractive Flowers
Attracts Pollinators
Buffer
Colorful
Defines Paths
Easy to Grow
Edible fruit
Fragrance
Pieces Used in Games
Screening
Shade
Sound
Textural
Wildlife Cover/Habitat
Wildlife Food Source
Wildlife Larval Host
Wildlife Nesting
Wind Break
Wind Shimmer

Quercus incana Fruit

Quercus incana: Fruit Description

Biennial round acorns are 1/2 inch, brown with light stripes, red-brown scales on the cup that covers half the nut.

Quercus incana: Fruit Type

Achene
Aggregate
Berry
Capsule
Caryopsis
Drupe
Follicle
Legume
Nut
Pome
Samara
Schizocarp
Siliqua

Quercus incana: Fruit Color

grass
Brown/Copper

Quercus incana: Display/Harvest Time

Fall
Spring
Summer
Winter

Quercus incana: Fruit Length

< 1 inch
1-3 inches
> 3 inches

Quercus incana Flowers

Quercus incana: Flower Description

Male flowers are drooping yellowish-red catkins in spring. Female flowers are produced singly or in pairs on short stalks.

Quercus incana: Flower Color

filter_vintage
Gold/Yellow
filter_vintage
Green

Quercus incana: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Quercus incana: Flower Bloom Time

Winter
Spring
Summer
Fall

Quercus incana Leaves

Quercus incana: Leaf Description

Thick leathery, glossy, blue-green with short hairy petiole, base acute to rounded, apex acute with a bristle on the tip. Undersides veins are prominent blue-green and hairy. Leaves are tardily deciduous often remain on the tree late into the year. 2-4 inches long and 1/2 to 1 inch wide.

Quercus incana: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Quercus incana: Leaf Color

spa
Blue
spa
Green

Quercus incana: Leaf Type

Compound (Pinnately , Bipinnately, Palmately)
Fronds
Needles
Sheath
Simple

Quercus incana: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Quercus incana: Leaf Shape

Acicular
Auriculate
Cordate
Cuneate
Deltoid
Elliptical
Filiform
Lanceolate
Linear
Oblanceolate
Oblong
Obovate
Obtuse
Orbicular
Ovate
Palmasect
Palmatifid
Peltate
Pinnatifid
Pinnatisect
Reniform
Rhomboidal
Spatulate
Subcordate
Subulate

Quercus incana: Leaf Margin

Crenate
Crenulate
Dentate
Denticulate
Doubly Crenate
Doubly Dentate
Doubly Serrate
Entire
Lobed
Serrate
Sinuate
Undulate

Quercus incana: Hairs Present

No
Yes

Quercus incana: Leaf Length

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Quercus incana: Leaf Feel

Fleshy
Glossy
Leathery
Papery
Prickly
Rough
Rubbery
Slippery
Smooth
Soft
Velvety
Waxy

Quercus incana: Leaf Width

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Quercus incana Bark

Quercus incana: Bark Description

Thick, dark gray to black furrowed with square plates

Quercus incana: Bark Color

grass
Black
grass
Dark Gray

Quercus incana: Surface/Attachment

Bumpy
Exfoliating
Fissured
Furrowed
Lenticels
Papery
Patchy
Peeling
Ridges
Scaly
Shaggy
Shiny
Shredding
Smooth
Spongy

Quercus incana: Bark Plate Shape

Diamond
Irregular
Oval
Rectangle
Round
Square

Quercus incana Stem

Quercus incana: Stem Description

Red-brown buds, oval with hairy scales, brown twigs 5-angled hairy when young.

Quercus incana: Stem Color

grass
Brown/Copper
grass
Red/Burgundy

Quercus incana: Stem Is Aromatic

No
Yes

Quercus incana: Stem Cross Section

Angular
Oval
Round
Square

Quercus incana: Stem Surface

Corky Ridges
Covered with a powdery bloom (glaucous)
Dull
Hairy (pubescent)
Polished
Smooth (glabrous)

Quercus incana: Stem Form

Straight
Zig Zags

Quercus incana: Stem Buds

Hairy
Hairy tips
Scaly
Smooth/Hairless

Quercus incana: Stem Bud Terminal

Cluster of terminal buds
Only 1 terminal bud, larger than side buds
Only 1 terminal bud, smaller than side buds

Quercus incana Poisonous to Humans

Quercus incana: Poison Symptoms

Abdominal pain, constipation then diarrhea (occasionally bloody), depression, frequent urination, discolored urine, jaundice; acorns can obstruct the digestive tract

Quercus incana: Poison Toxic Principle

Gallotannin

Quercus incana: Poison Severity

High
Low
Medium

Quercus incana: Causes Contact Dermatitis

No
Yes

Quercus incana Whole Plant Traits

Quercus incana: Plant Type

Annual
Bulb
Carnivorous
Edible
Epiphyte
Fern
Ground Cover
Herb
Herbaceous Perennial
Houseplant
Mushroom
Native Plant
Ornamental Grasses and Sedges
Perennial
Poisonous
Rose
Shrub
Succulent
Tree
Turfgrass
Vegetable
Vine
Water Plant
Weed
Wildflower

Quercus incana: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Quercus incana: Habit/Form

Arching
Ascending
Broad
Cascading
Climbing
Clumping
Columnar
Conical
Creeping
Dense
Erect
Horizontal
Irregular
Mounding
Multi-stemmed
Multi-trunked
Open
Oval
Prostrate
Pyramidal
Rounded
Spreading
Vase
Weeping

Quercus incana: Growth Rate

Slow
Medium
Rapid

Quercus incana: Maintenance

Low
Medium
High

Quercus incana: Texture

Fine
Medium
Coarse

Quercus incana Cultural Conditions

Quercus incana: Light

Dappled Sunlight (Shade through upper canopy all day)
Deep shade (Less than 2 hours to no direct sunlight)
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)

Quercus incana: Soil pH

Acid (<6.0)
Alkaline (>8.0)
Neutral (6.0-8.0)

Quercus incana: Soil Drainage

Frequent Standing Water
Good Drainage
Moist
Occasional Flooding
Occasionally Dry
Occasionally Wet
Very Dry

Quercus incana: NC Region

Coastal
Mountains
Piedmont

Quercus incana: USDA Plant Hardiness Zone

thermostat
7a
thermostat
7b
thermostat
8a
thermostat
8b
thermostat
9a
thermostat
9b

Quercus incana: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Quercus incana Landscape

Quercus incana: Landscape Theme

Asian Garden
Butterfly Garden
Children's Garden
Cottage Garden
Cutting Garden
Drought Tolerant Garden
Edible Garden
English Garden
Fairy Garden
Garden for the Blind
Native Garden
Nighttime Garden
Pollinator Garden
Rain Garden
Rock Garden
Shade Garden
Water Garden
Winter Garden

Quercus incana: Design Feature

Accent
Barrier
Border
Flowering Tree
Foundation Planting
Hedge
Mass Planting
Screen/Privacy
Security
Shade Tree
Small groups
Small Tree
Specimen
Street Tree
Understory Tree

Quercus incana: Resistance To Challenges

Black Walnut
Compaction
Deer
Diseases
Drought
Dry Soil
Erosion
Fire
Foot Traffic
Heat
Heavy Shade
Humidity
Insect Pests
Pollution
Poor Soil
Rabbits
Salt
Slugs
Squirrels
Storm damage
Urban Conditions
Voles
Wet Soil
Wind

Quercus incana: Landscape Location

Coastal
Container
Hanging Baskets
Houseplants
Lawn
Meadow
Naturalized Area
Near Septic
Patio
Pond
Pool/Hardscape
Recreational Play Area
Riparian
Rock Wall
Slope/Bank
Small Space
Vertical Spaces
Walkways
Woodland

Quercus incana: Attracts

Bats
Bees
Butterflies
Frogs
Hummingbirds
Moths
Pollinators
Predatory Insects
Reptiles
Small Mammals
Songbirds
Specialized Bees

Quercus incana: Problems

Allelopathic
Contact Dermatitis
Frequent Disease Problems
Frequent Insect Problems
Invasive Species
Malodorous
Messy
Poisonous to Humans
Problem for Cats
Problem for Children
Problem for Dogs
Problem for Horses
Short-lived
Spines/Thorns
Weak Wood
Weedy