Scientific Name:
Corylus avellana
'Contorta'
Pronunciation:
KORE-ih-lus av-ih-LAY-nuh
Common Name:
contorted European filbert, Harry Lauder's walking stick, corkscrew hazel
Family Name:
Betulaceae
Plant Type:
Shrub - deciduous, Tree - deciduous
Key ID Features:
Small tree/shrub, curled/twisted branches; leaves alternate, obovate, 6-12cm long x 4-8cm wide, matte surface, wrinkled, doubly toothed; catkins yellow, male, pendulous, Apr; nut 1-2cm wide with leafy involucre. Winter ID: twigs contorted, with stiff hairs and immature male catkins mostly in 3's near tips; buds green-pale brown, chubby.
Habit:
Irregular, Stiffly upright
Form:
Irregular, Oval - vertical
Texture:
Medium
Mature Height:
3 - 5m
Mature Spread:
2 - 3m
Growth Rate:
Slow
Origin:
Europe, Garden origin
Hardiness Rating:
Zone 4: (-34 to -29 °C)
Exposure:
Full sun, Part sun/part shade
Soil/Growing Medium:
Alkaline, Rocky or gravelly or dry, Well-drained
Landscape Uses:
Cut flower or foliage, Fall interest, Specimen plant, Wildlife food, Winter interest
Additional Info:
Google. Compare to C. 'Red Majestic' (a purple cultivar with similar habit).
Leaf Morphology:
Form:
Simple
Arrangement:
Alternate
Texture/Venation:
Leathery, Heavily veined, Pinnate venation
Surfaces:
Rugose, Pubescent
Colour in Fall:
Yellow, Red
Shapes:
Orbicular
Apices:
Acuminate
Bases:
Cordate
Margins:
Double serrate, Undulate (wavy)
Additional Info:
Spectacular fall colour
Inflorescence Type:
Catkin (ament)
Flower Morphology:
Monoecious plant
Number Of Petals:
0
Colour (petals):
Not showy, Green-yellow, Brown
Flower Scent:
None
Flower Time at Peak:
Mar, Apr
Additional Info:
Male catkins; female flowers reduced to just red stigmas that emerge from flower bud containing 2 or 3 flowers
Fruit Type:
Nut
Fruit Colour:
Brown
Fruiting Time:
Sep, Oct
Additional Info:
Not showy, may be absent
Bark Morphology:
Showy, Smooth, Prominent lenticels, Single stem trunk
Bark or Stem Colour:
Grey, Tan, Brown
Leaf Bud Type:
Oblong
Leaf Scar Shape:
Round
Organ Modifications:
Ectomycorrhizae
Propagation:
Grafting
Maintenance:
Low
Other:
remove root suckers
Pest Susceptibility:
Dieback, Fungal leaf spot, Mites, Root rot, Rust (Drought tolerant)
Course(s):
- CLT Training
- HORT 2355
Location(s):
- (GAZ) GAZebo
- (GAZN) GAZebo North : regenerating from roots
- (HPZ) Horticulture PlaZa : 463