little walnut Juglandaceae Juglans microcarpa Berl. Listen to the Latin symbol: JUMI Other Fact Sheets
Leaf: Alternate, pinnately compound, 13 to 21 leaflets, each 1 1/2 to 4 inches long, lanceolate or narrowly ovate, finely serrated, often curved, entire leaf 8 to 12 inches long, green above and paler below, aromatic when crushed.
Flower: Species is monoecious; male flowers yellow-green in hanging catkins on last years twigs; females small, yellow-green at the ends of branches usually in a small cluster; appearing in spring with the leaves.
Fruit: Round nut, 1/2 to less than an inch in diameter; husk is thin and indehiscent, initially yellow-green but turning brown with age; nut with a hard, thick, deeply grooved shell, edible but small nut; ripening in the fall.
Twig: Moderately stout, initially green but turning gray-brown; leaf scars rasied, 3-lobed; buds light brown, fuzzy; pith brown and chambered.
Bark: Gray but becoming darker with age, roughly ridged and furrowed.
Form: A small multi-trunked tree or large shrub reaching up to 30 feet with a wide spreading crown.

Looks like: Arizona walnut
leaf fruit bark form1 map
Additional Range Information:
Juglans microcarpa is native to North America.
Range may be expanded by planting.
See states reporting little walnut.
External Links:
USDAFS Additional Silvics
USDA Plants Database
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Photos and text by: John Seiler,
Edward Jensen, Alex Niemiera,
and John Peterson
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