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 (11-)15(-23) leaflets; fruit is a large brown to yellow and drupe-like. Winter ID: leaf scar large (8 mm), resembles a monkey face; buds small, dark brown; new growth and buds pubescent.
Course(s):	HORT 1155, Level 3 Apprenticeship

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. Compare to English walnut.

Leaf Morphology: Glossary Form: Compound Arrangement: Alternate Texture/ Venation: Soft flexible Surfaces: Distinctive smell, Lustrous Compound Leaf: Odd-pinnate 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 Ovary Position: Perigynous 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: Not showy, Accessory tissue, Edible, The husk tissue is formed from fused bracts and sepals (this is more obvious in related species). The husk and the hard endocarp-like shell making them look very much like drupes, but they are botanically more nut-like than drupe-like with accessory bract tissue. But also because of the hard endocarp shell many consider them pseudodrupes or drupe-like nuts.

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

Propagation:	Seed, Grafting
Pest Susceptibility:	Anthracnose, Bacterial leaf spot, Dieback, Mites, Mold, Root rot, Scale insects,
Specific Pests:	Gnomonia leptostyla

Location(s): (BUG) BUG garden : q.2 seedlings - juvenile foliage - confirm ID (JPL) Juglans PLanting : 138 Location Map

Report an Error