Juglans regiaL.

Persian walnut

WFO wfo-0000355051 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Juglans regia, photographed by Alexis Tinker-Tsavalas
fig. a Alexis Tinker-Tsavalas, CC BY 4.0 / 2022-06-11 / obs. 205409008
Juglans regia, photographed by Jason Grant
fig. b Jason Grant, CC BY 4.0 / obs. 205218233
Juglans regia, photographed by Alexis Tinker-Tsavalas
fig. c Alexis Tinker-Tsavalas, CC BY 4.0 / obs. 204580308
Juglans regia, photographed by Vladimír Fuka
fig. d Vladimír Fuka, CC BY 4.0 / obs. 204705088
Juglans regia, photographed by Alexis Tinker-Tsavalas
fig. e Alexis Tinker-Tsavalas, CC BY 4.0 / obs. 203422111
Juglans regia, photographed by Yann Kemper
fig. f Yann Kemper, CC0 1.0 / obs. 203173387
Juglans regia, photographed by Vladimír Fuka
fig. g Vladimír Fuka, CC BY 4.0 / obs. 204204689
Juglans regia, photographed by Yann Kemper
fig. h Yann Kemper, CC0 1.0 / obs. 203137844

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Confused withby our own model

These are not lookalikes we guessed at. Each one is a species our identification model genuinely mistook for this plant, and how many times. The error rate is published.

Flowering n = 322 observations

Peak flowering in Apr, from 322 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 54 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Juglans arguta Wall. ex C.DC.
  • Juglans aspleniifolia Dippel
  • Juglans dissecta Dippel
  • Juglans duclouxiana Dode
  • Juglans fallax Dode
  • Juglans fertilis Dippel
  • Juglans filicifolia Lodd. ex Loudon
  • Juglans frutescens Dippel
  • Juglans fruticosa Dippel
  • Juglans heterophylla Loudon
  • Juglans kamaonia (C.DC.) Dode
  • Juglans laciniata (Jacques) Dochnahl
  • Juglans longirostris Carrière
  • Juglans monophylla Dochnahl
  • Juglans orientis Dode
  • Juglans pendula (Pépin) Dochnahl
  • Juglans praematuriens Poitier ex Pépin
  • Juglans quercifolia N.Pierce
  • Juglans regia f. fruticosa Dippel
  • Juglans regia f. heterophylla (Jacques) C.K.Schneid.
  • Juglans regia f. laciniata (Jacques) C.K.Schneid.
  • Juglans regia f. monophylla (Dochnahl) C.K.Schneid.
  • Juglans regia f. pendula (Pépin) C.K.Schneid.
  • Juglans regia f. praematuriens (Poitier ex Pépin) Rehder

and 30 more.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.

We publish what we can source and we say so when we cannot. This page has no care advice, no toxicity claim and no native range, because we do not yet have those from a source we can cite.