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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

JUGLANS WALNUT
Stem: bark smooth to furrowed in age, gray to gray-brown; twig centers chambered; buds scaly. Pistillate inflorescence: flowers 1–few; in fruit erect. Pistillate flower: styles elongate. Fruit: 1–3 unwinged nuts per inflorescence; leathery husk enclosing, not separating from each nut, not splitting.
21 species: North America, temperate Asia, South America. (Latin: Jove's nut) Wood used for interior finishing, furniture; source of nuts, dye. Juglans nigra L., occasionally planted, resembles Juglans hindsii but has leaflets uniformly pubescent abaxially, nuts deeply grooved, coarsely warty.

Key to Juglans

1. Leaflets 5–11, elliptic to oblong-ovate, entire; nut shell ± thin, wrinkled ..... [J. regia]

1' Leaflets (9)11–21, narrow-elliptic to -triangular or -lanceolate, ± serrate; nut shell thick, smooth to shallowly grooved.

2. Leaflets generally narrow-elliptic to -lance-elliptic (less often lanceolate), rounded to acute; abaxial vein axils glabrous ..... J. californica

2' Leaflets narrow-triangular to -lanceolate, acuminate; abaxial vein axils with tufts of hairs ..... J. hindsii

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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