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|Jepson eFlora: Taxon page
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|Family: Juglandaceae||View Description||Dichotomous Key|
|Genus: Juglans||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Juglans regia L.
Stem: Trunk 5--30 m. Leaf: petiole 5.5--11 cm; leaflets 5--11, 10--22 cm, elliptic to oblong-ovate, entire, generally short-acuminate (less often acute), abaxial vein axils with tufts of hairs. Fruit: 3.5--5 cm diam, nut shell +- thin, wrinkled.
Ecology: Seedlings occasionally near cultivated trees; Elevation: < 200 m. Bioregional Distribution: n NCoRO, GV, CW, SW; Distribution Outside California: native to southwestern Asia. Flowering Time: Apr Note: Widely cultivated for nuts. Very short-lived in California unless grafted on resistant roots of Juglans hindsii or Juglans hindsii × Juglans regia, the latter reproducing in wild vegetation near plantings. Juglans regia also crosses with Juglans californica where planted near stands of the latter sp. Further study of walnut hybrids in California needed.
eFlora Treatment Author: Alan T. Whittemore
Jepson Online Interchange
Previous taxon: Juglans hindsii
Next taxon: Pterocarya
Citation for this treatment: Alan T. Whittemore 2016. Juglans regia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=29576, accessed on May 06, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 06, 2016.