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Juglans hindsii
NORTHERN CALIFORNIA BLACK WALNUT

Higher Taxonomy
Family: JuglandaceaeView DescriptionDichotomous Key

Common Name: WALNUT FAMILY
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.
Species In Genus: 21 species: North America, temperate Asia, South America. 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.
NATIVE
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).
eFlora Treatment Author: Alan T. Whittemore
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 2016. Juglans hindsii, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=29568, accessed on May 27, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 27, 2016.


Juglans hindsii
click for enlargement
© 2009 Keir Morse
Juglans hindsii
click for enlargement
© 2012 Neal Kramer
Juglans hindsii
click for enlargement
© 2009 Keir Morse
Juglans hindsii
click for enlargement
© 2008 Keir Morse
Juglans hindsii
click for enlargement
© 2009 Keir Morse
Juglans hindsii
click for enlargement
© 2009 Neal Kramer

More photos of Juglans hindsii in CalPhotos


Geographic subdivisions for Juglans hindsii:
s NCoRI, s ScV, n SnJV, SnFrB;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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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).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.