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Juglans regia; photograph (c) Marc Riera, some rights reserved (CC BY) CC BY(c) Marc Riera, some rights reserved (CC BY) · observed growing wild · 2026-09-25

Juglans regia L.

English walnut; Walnut; Common walnut; Persian walnut

Juglandaceae · North Caucasus, Transcaucasus +7

No habitat climate
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Juglans regia, photograph author not stated, no rights reservedJuglans regia, photograph (c) Viktor Strenada, some rights reserved (CC BY)Juglans regia, photograph (c) Marc Riera, some rights reserved (CC BY)Juglans regia, photograph (c) guywallbanks, some rights reserved (CC BY)Juglans regia, photograph author not stated, no rights reservedJuglans regia, photograph (c) Dietmar K. L. Moser, some rights reserved (CC BY) 61 photographs ›

Summary

Juglans regia, known by various common names including the common walnut, English walnut, or Persian walnut amongst other names, is a species of walnut. It is native to Eurasia in at least southwest and central Asia and southeast Europe, but its exact natural area is obscure due to its long history of cultivation.

Quoted from Wikipedia, "Juglans regia", CC BY-SA 4.0.

Cultivation

Nothing derived: no habitat climate for this species.

Climate across the habitat

No habitat climate can be derived: Only 1 distinct land cell of the climate grid holds an in-range record placed to within 10 km (1 at sea or ice); three are needed for an envelope.

Natural habitat

Native range as published by WCVP; the marker is where the records are densest and decides nothing.
Openly licensed records inside the range, framed on where they fall.
NativeNorth Caucasus, Transcaucasus, Afghanistan, Iran, Iraq, Lebanon-Syria, Turkey, Pakistan, West Himalaya · introduced: Denmark, Great Britain, Ireland, Norway, Austria, Belgium, Germany, Hungary, Poland, Switzerland, Corse, France, Portugal, Sardegna, Spain, Albania, Bulgaria, Greece, Italy, Kriti, Romania, Sicilia, Turkey-in-Europe, Yugoslavia, Baltic States, Krym, South European Russia, Ukraine, Algeria, Libya, Morocco, Tunisia, Canary Is., Madeira, Primorye, Kazakhstan, Kirgizistan, Turkmenistan, Tadzhikistan, Uzbekistan, Cyprus, East Aegean Is., Oman, China South-Central, Inner Mongolia, China North-Central, China Southeast, Tibet, Korea, Assam, East Himalaya, Nepal, Laos, Vietnam, Mexico Southwest · regions are the level-3 units of the World Geographical Scheme for Recording Plant Distributions, as Kew's World Checklist records ranges, some under historical names such as Yugoslavia or Czechoslovakia (how).
Map marker44.802, 37.433 · in the densest population, 3 records (100% of those in range)
Kew's description“tree” · “temperate” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 3 georeferenced records inside the native range; the map shows only the 1 openly licensed one, which alone would put the marker in the same place. 741 records outside the WCVP native range not used. Under a dozen records behind the map. No climate across the range is derived for this species.
How this section is made
The map marker: the openly licensed record nearest the middle of the densest 1° population of the 3 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Juglans regia, photograph 1did not loadJuglans regia, photograph 2did not loadJuglans regia, photograph 3did not loadJuglans regia, photograph 4did not loadJuglans regia, photograph 5did not loadJuglans regia, photograph 6did not load

Photographs: author not stated, no rights reserved · CC0 (2); (c) Viktor Strenada, some rights reserved (CC BY); (c) Marc Riera, some rights reserved (CC BY); (c) guywallbanks, some rights reserved (CC BY); (c) Dietmar K. L. Moser, some rights reserved (CC BY).

Other Juglans 14 in the reference

Juglans australis Juglans australis Argentine walnut Photo: CC BY, aacocucciJuglans × bixbyi Juglans × bixbyi Bixby's walnut Photo: CC BY-SA, Douglas GoldmanJuglans californica Juglans californica Southern California black walnut Photo: CC BY, klickloJuglans cinerea Juglans cinerea Butternut Photo: CC BY, treelogicalJuglans hindsii Juglans hindsii Northern California black walnut Photo: CC BY, Irina Mitine Juglans hopeiensis Hebei walnut Juglans jamaicensis Juglans jamaicensis West Indian walnut Photo: CC BY, J. L. Gómez-HechavarríaJuglans major Juglans major Arizona walnut Photo: CC BY, Jo RobertsJuglans mandshurica Juglans mandshurica Manchurian walnut Photo: CC BY, Maria GalkinaJuglans microcarpa Juglans microcarpa Little walnut Photo: CC BY, Sam KieschnickJuglans mollis Juglans mollis Mexican walnut Photo: CC BY, Cody HinchliffJuglans neotropica Juglans neotropica Andean walnut Photo: CC BY, GERMAN LEONEL SARMIENTO CRUZ all 15 ›

Names & registers

Also known as Juglans arguta; Juglans asplenifolia; Juglans dissecta; Juglans duclouxiana; Juglans fallax and 63 more. (GBIF Backbone)

Kew accepts as species of their own Juglans hispanica: older names in GBIF's record of this species that Kew's World Checklist accepts as other species. (WCVP, RBG Kew, file of 2026-06-04)

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Juglandaceae
Described by
L.
Native to
North Caucasus, Transcaucasus, Afghanistan +6
Wild records
3 in range · 1 open

Every figure here is derived from public data by a stated rule and names its source; nothing about this species is written for its page by a person or by AI, apart from the marked, credited quotations. How →

Where this page came from built 2026-10-22
GBIF species record gbif.species answeredasked 2026-10-22
GBIF synonyms gbif.synonyms answeredasked 2026-10-22
GBIF common names gbif.vernacular answeredasked 2026-10-22names fetched 2026-10-22
WCVP native range wcvp.distribution answeredas of 2026-06-04
GBIF occurrence records gbif.occurrences answeredasked 2026-10-22GBIF occurrence search API; 36 records within 1 km of a botanic garden, herbarium or zoo left out (22 at a botanic garden or arboretum, 2 at a herbarium, 12 at a zoo; Wikidata's list)
Habitat climate climate nothing to reportasked 2026-10-22only 1 distinct land cell of the climate grid holds an in-range record placed to within 10 km (1 at sea or ice); three are needed for an envelope
Wikidata wikidata answeredasked 2026-10-22
Wikipedia wikipedia answeredasked 2026-10-22
iNaturalist photographs, wild inat.photos.wild answeredasked 2026-10-22from iNaturalist's open data of 2026-09-27: research-grade observations with an open-licence photograph, the 24 whose photographs iNaturalist received last (the open data holds no votes); filled 2026-10-22
iNaturalist photographs, cultivated inat.photos.cultivated not asked
GBIF media gbif.media answeredasked 2026-10-22
OpenAlex papers openalex not askednot yet asked for this reference; a later fill takes the papers from OpenAlex's snapshot

Every source is recorded as having answered, reported nothing, refused, failed, not been asked, or answered twice where one answer is taken (“not taken: two items answered”), and, for a source asked when this page was built, when: the figures are as the source held them that day; a source read from a file (Kew's World Checklist, a GBIF download) says "as of" the file's day instead; a row carried from an earlier build of the page names that build instead. Only “nothing to report” is ever shown as an absence. Records came from 11 datasets via GBIF.org; each carries its own licence.

Cultifolio

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