Scientific Name:
Quercus phellos
Pronunciation:
KWURK-us FELL-us
Common Name:
willow oak
Family Name:
Fagaceae
Plant Type:
Tree - deciduous
Key ID Features:
Twiggy, horizontal oak tree; leaves alternate (may appear whorled at stem tips), lanceolate to narrowly elliptic-oblong, most blades 8-12cm long x 1.5-2.5cm wide; margin entire to wavy; petioles 2-5mm long. Winter ID: persistent or fallen leaves; twigs narrow, glabrous; terminal buds ovoid, pointed, appear clustered, reddish-brown, about 2mm long; leaf scars raised, half-round with scattered bundle scars.
Habit:
Dense, Pendulous, Spreading, Twiggy, Upright
Form:
Oval - vertical, Pyramidal - widely
Texture:
Medium - fine
Mature Height:
15 - 22m
Mature Spread:
7 - 10m
Growth Rate:
Moderate
Origin:
U.S. - central, U.S. - southwest
Hardiness Rating:
Zone 6: (-23 to -18 °C)
Exposure:
Full sun, Part sun/part shade
Soil/Growing Medium:
Well-drained
Water Use:
Wetlands
Landscape Uses:
Screening, Shade tree, Specimen plant, Tall background, Wetland - bogs, Wind break
Additional Info:
Leaf Morphology:
Form:
Simple
Arrangement:
Alternate
Texture/Venation:
Soft flexible, Pinnate venation
Surfaces:
Glabrous, Lustrous
Colour in Summer:
Green-yellow
Colour in Fall:
Yellow, Orange, Brown
Shapes:
Elliptic, Lanceolate, Oblong
Apices:
Acute
Bases:
Attenuate
Margins:
Entire, Undulate (wavy)
Inflorescence Type:
Catkin (ament)
Flower Morphology:
Monoecious plant
Number Of Petals:
0
Ovary Position:
Inferior
Colour (petals):
Not showy, Green-yellow
Flower Time at Peak:
Mar
Fruit Type:
Nut
Fruit Colour:
Yellow, Brown
Fruiting Time:
May
Additional Info:
Showy,
Bark Morphology:
Lightly fissured, Single stem trunk
Bark or Stem Colour:
Grey, Brown
Leaf Bud Type:
Ovoid
Leaf Scar Shape:
Half-round
Organ Modifications:
Ectomycorrhizae, Fibrous-like roots
Propagation:
Seed, Softwood cuttings, Grafting
Maintenance:
Low
Pest Susceptibility:
Anthracnose, Galls, Leaf miner insect, Root rot, Rust, Scale insects, Stem borer insects, Wilt
