English walnut Juglandaceae Juglans regia L. Listen to the Latin symbol: JURE80 Other Fact Sheets
Leaf: Alternate, pinnately compound with 5 to 7 (occasionally 9) leaflets, to 12 to 18 inches long, leaflets are ovate to obovate with entire or sometimes finely serrated margins, to 5 inches long, rachis is stout, terminal leaflets the largest; purple-brown when developing, shiny green when mature, very aromatic when crushed.
Flower: Species is monoecious; males are single-stemmed catkins to 6 inches; females in clusters of 3-9, with or just after the leaves.
Fruit: Round nut, to 2 inches in diameter; husk is moderate and indehiscent, initially bright green but turning brown, nut is relatively thin and smooth with a few shallow furrows; flesh is creamy white to light brown, sweet, oily (edible); matures in fall.
Twig: Stout, light brown, with a buff-colored chambered pith, terminal buds are large, broadly pointed, often paired and pubescent, lateral buds are much smaller, pre-formed male catkins often in axils of leaves, leaf scar 3-lobed.
Bark: Light, ashey gray, with flattened ridges, developing a striking diamond shaped pattern.
Form: Generally to 60 feet, with an equally wide spread crown; obvious stout twigs.

Looks like: butternut - black walnut - California black walnut - mockernut hickory
leaf flower fruit twig bark form1 map
Additional Range Information:
Juglans regia is planted in the USDA hardiness zones shown above and is not known to widely escape cultivaton.
External Links:
USDA Plants Database
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Photos and text by: John Seiler,
Edward Jensen, Alex Niemiera,
and John Peterson
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