walnuts

genus Juglans

Member of walnut family (family Juglandaceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

There are no other wild species of this genus in the bay area.

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Crushed leaf has a distinctive smell, sometimes described as spiced citrus.

Green husk enclosing brown nut shell can permanently stain your hands when opened.

eastern black walnut
Juglans nigra

• leaflets 15–23, ± serrate, narrow, ovate-lanceolate
• abaxial vein axils with hairy tufts
• abaxial veins uniformly pubescent
• nut shell deeply grooved, coarsely warty
• planted/waifs

southern california walnut
Juglans californica

• leaflets 11–21, ± serrate, narrow, rounded to acute
• abaxial vein axils glabrous
• nut shell thick, smooth to shallowly grooved

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2 observed taxons / 2 unobserved taxons / 1 key

Chris’s observations: 11 (2 are research grade)

Locations:

• Ed R. Levin CP: 2
• Sierra Vista OSP: 2
• Bear Creek Redwoods OSP
• Coyote Hills RP
• Huckleberry Botanic RP
• Mt. Madonna SP
• Rancho Cañada del Oro OSP
• Shannon Valley OSP, Los Gatos
• Stevens Creek CP

Months:

• May: 3
• Jun.: 0
• Jul.: 5
• Aug.: 2
• Sep.: 1

For more details, use advanced search.

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Taxon info: iNaturalist – Calflora – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora