Jepson Herbarium
		University of California, Berkeley

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Shrub, tree; monoecious.
Leaf: odd-(even-)1- pinnate, alternate, deciduous; stipules 0.
Inflorescence: catkin, generally appearing before leaves, 1 or clustered; flowers generally 1 in bract axils.
Staminate inflorescence: pendent, elongate, many-flowered, on last yr's twigs.
Pistillate inflorescence: erect; flowers 1–many, at tip of new twigs.
Staminate flower: calyx [0 or] lobes generally 4 [2, 6]; petals 0; stamens 3–40[50]; pistil 0 or vestigial.
Pistillate flower: calyx [0] or lobes 4; petals 0; stamens 0; ovary 1, inferior, chamber 1 above, generally 2 below, styles 2, plumose.
Fruit: nut enclosed in husk or winged nutlets.
9 genera, > 60 species: n temperate, subtropical mountains; some ornamental, cultivated for wood, nuts (Carya hickory, pecan; Juglans walnut). [Stone 1997 FNANM 3:416–428] In Carya, Juglans, husk included in fruit diam, even though derived from involucre, calyx, and therefore not technically part of fruit. —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Elias 1972 J Arnold Arbor 53: 26–51]

Key to Juglandaceae

Stem: Bark furrowed in age, gray; twig centers not chambered; buds scaly.
Pistillate inflorescence: flowers 1–few; in fruit erect.
Pistillate flower: styles short.
Fruit: husk enclosing 1–3 unwinged nuts, splitting longitudinally, separating from fruit.
± 17 species: eastern North America, eastern Mex, eastern Asia. (Greek: nut)

Tree to 45 m.
Stem: bark shallowly to deeply furrowed; terminal buds 6–7 mm, brown, scales valvate.
Leaf: leaflets (7)9–13, lanceolate, 110–160 mm, 28–43 mm wide, sickle-shaped, acuminate.
Staminate inflorescence: ± sessile.
Fruit: 3–4 cm, 1.5–2 cm diam, elliptic to ± cylindric, with four low wings along sutures; shell smooth.
Riparian forest, watercourse margins; < 600 m. San Joaquin Valley, South Coast;

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Next taxon: Juglans

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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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Bioregions in which taxon occurs	Red area (if present) is the part of the bioregion lying between the upper and lower elevation limits of the taxon; markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may have georeferencing or identification issues.
Chart based on elevation range in Manual and elevations and coordinates of CCH records. Data provided by the participants of the Consortium of California Herbaria. Note: About half of the CCH records include both elevation and coordinates.	Map made in collaboration with Scott Loarie. Data provided by the participants of the Consortium of California Herbaria. View all CCH records   CCH collections by month Duplicates counted once; synonyms included. Species do not include records of infraspecific taxa. Blue line denotes Manual flowering time.