Details of...
Scientific Name: Juglans nigra
Pronunciation: JOO-glanz NYE-gruh
Common Name: black walnut
Family Name: Juglandaceae
Plant Type: Tree - deciduous
Key ID Features: Large tree; leaves oddly pinnate, commonly with 15 (11 - 23) leaflets; fruit is a large brown to yellow drupe. Winter ID: leaf scar large (8mm), resembles a monkey face; buds small, dark brown; new growth and buds pubescent.
Course(s): HORT 1155


Habit: Horizontal, Open, Spreading
Form: Oval - horizontal, Round
Texture: Coarse
Mature Size:
Height:22 - 30m
Spread:15 - 25m
Growth Rate:Moderate
Origin: Canada - eastern, U.S. - northeast
Hardiness Rating: Zone 5: (-29 to -23 C)
Exposure: Full sun
Soil/ Growing Medium: Well-drained
Water Use: Moderate
Landscape Uses: Herb, Specimen plant, Tall background, Wildlife food, Winter interest
Additional Info: Google Images
black walnut
 
 
Leaf Morphology:
Form: Compound
Arrangement: Alternate
Texture/ Venation: Soft flexible
Surfaces: Distinctive smell, Lustrous
Compound Leaf: Odd-pinnate
Colour in Summer: Green
Colour in Fall: Yellow
Leaf(let) Terms:
Shapes: Lanceolate
Apices: Acuminate
Margins: Serrate
Additional Info: Spectacular fall colour, 15 (-23) leaflets per leaf

 
 
Inflorescence Type: Floriferous, Catkin (ament)
Flower Morphology:Monoecious plant
Number of Petals:0
Colour (petals): Showy, Green, Yellow
Flower Scent: None
Flower Time at Peak: Mar, Apr

 
Fruit Type: Nut
Fruit Colour: Yellow, Brown
Fruiting Time: Sep, Oct
Additional Info: Accessory tissue, Edible, The enclosing husk tissue is formed from fused bracts. This and the hard endocarp shell making them look very much like drupes, but they are still technically nuts with accessory bract tissue.

 
Bark Morphology: Showy, Deeply fissured
Bark or Stem Colour: Brown, Black
  
Leaf Scar Shape:U-shaped


Propagation: Seed, Grafting
Pest Susceptibility: Anthracnose, Dieback, Mites, Mold, Root rot, Scale insects, Bacterial leaf spot
Specific Pests: Gnomonia leptostyla
 
Location(s):
(JPL) Juglans PLanting : 138
Location Map

Report an Error

logo