Jepson eFlora: Taxon page
Vascular Plants of California
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Juglans hindsii

Higher Taxonomy
Family: JuglandaceaeView DescriptionDichotomous Key
Habit: 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 year'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.
Genera In Family: 9 genera, > 60 species: northern temperate, subtropical mountains; some ornamental, cultivated for wood, nuts (Carya hickory, pecan; Juglans walnut). Note: In Carya, Juglans, husk included in fruit diam, even though derived from involucre, calyx, and therefore not technically part of fruit.
eFlora Treatment Author: Alan T. Whittemore
Scientific Editor: Thomas J. Rosatti.
Genus: JuglansView DescriptionDichotomous Key

Common Name: 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.
Etymology: (Latin: Jove's nut) Note: 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.
Juglans hindsii Jeps. ex R.E. Sm.
Stem: trunk 6--23 m. Leaf: petiole 3--8 cm; leaflets 13--21, (6)7--13 cm, narrow-triangular to -lanceolate, +- serrate, acuminate, abaxial vein axils with tufts of hairs. Fruit: 3.5--5 cm diam, nut shell thick, smooth to shallowly grooved.
Ecology: Along streams, disturbed slopes; Elevation: < 300 m. Bioregional Distribution: s NCoRI, s ScV, n SnJV, SnFrB; Distribution Outside California: southwestern Oregon. Flowering Time: Apr--May Note: Native to 3 sites, widely cultivated as rootstock for Juglans regia, escaping sporadically in CW, GV.
Synonyms: Juglans californica S. Watson var. hindsii Jeps.
Unabridged Note: Native to 3 sites, widely cultivated as rootstock for Juglans regia, escaping sporadically in CW, GV; some authorities contend that correct author citations are other than what is presented here (see ICPN).
Jepson eFlora Author: Alan T. Whittemore
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Listed on CNPS Rare Plant Inventory

Previous taxon: Juglans californica
Next taxon: Juglans regia

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Citation for this treatment: Alan T. Whittemore 2012, Juglans hindsii, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on November 28, 2023.

Citation for the whole project: Jepson Flora Project (eds.) 2023, Jepson eFlora,, accessed on November 28, 2023.

Juglans hindsii
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©2016 Steve Matson
Juglans hindsii
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©2012 Neal Kramer
Juglans hindsii
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©2008 Keir Morse
Juglans hindsii
click for enlargement
©2008 Keir Morse
Juglans hindsii
click for enlargement
©2016 Steve Matson

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Geographic subdivisions for Juglans hindsii:
s NCoRI, s ScV, n SnJV, SnFrB
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).


Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).