Jepson Interchange (more information)
Print edition is available from the University of California Press
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This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants. |
| Jepson Flora Project: Jepson Interchange |
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TREATMENT FROM THE JEPSON MANUAL |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press |
| The second edition of The Jepson Manual (2012) is available from the University of California Press | |
| See also the Jepson eFlora, which parallels the Second Edition |
Shrub, tree, generally monoecious
Leaves generally odd-1-pinnate, alternate, deciduous; stipules 0
Inflorescence: catkin, generally appearing before leaves, generally clustered; flowers generally solitary in bract axils
Staminate inflorescence generally pendent, generally elongate, generally many-flowered, on last year's twigs
Pistillate inflorescence generally erect; flowers 1–3, at tip of new twigs
Staminate flower: sepals 3–6; petals 0; stamens 3–many; pistil 0 or vestigial
Pistillate flower: sepals 3–6; petals 0; stamens 0; pistil 1, ovary inferior, chamber 1 above, generally 2 below, styles generally 2, plumose
Fruit: nut enclosed in a ± fleshy husk, drupe-like
Genera in family: 7 genera, ± 60 species: n temp, subtropical mtns; some ornamental, cultivated for wood, nuts (Carya hickory, pecan; Juglans )
Reference: [Elias 1972 J Arnold Arb 53:26–51]
Shrub, tree, generally monoecious
Stem generally erect; bark smooth to furrowed in age, gray to brown; twig centers chambered
Staminate flower: calyx lobes generally 4, ± fused to bract
Pistillate flower: calyx lobes 4, generally ± fused to bract and bractlets, with them forming husk in fruit
Fruit in clusters, generally spheric; husk leathery, strong-smelling, indehiscent yet ± deciduous
Species in genus: 21 species: temp North America., n temp Eur, Asia, South America
Etymology: (Latin: walnut)
Reference: [Howell 1973 Madroño 22:144]
Wood used for interior finishing, furniture; source of nuts.
| Native |
Shrub, tree
Stem: trunks 1–5, generally < 25 m; bark gray to brown; twigs brown
Leaf: leaflets 11–19, 3–10 cm, lanceolate to ovate, toothed
Fruit (including husk) 2–3.5 cm diam; woody nut shell ± grooved
Ecology: Slopes, canyons, valleys
Elevation: 50–900 m.
Bioregional distribution: s Inner North Coast Ranges, s Sacramento Valley, n San Joaquin Valley, San Francisco Bay Area, Outer South Coast Ranges, South Coast, s Transverse Ranges, n Peninsular Ranges.Sometimes cultivated; hybrids with J. regia few, synthetic.
See the CNPS Inventory for information about endangerment and rarity.| YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps). |
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