by Stephen Mifsud
   3 Dec 2023      ()
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Juglans regia   (Walnut)

Juglans regia  (JUGLANDACEAE.) 
Images for this profile are taken from the Maltese Islands after year 2000.

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Profile Date Dec-2007 (taxon update: none)
Citation for this page Mifsud, S. (2022). Juglans regia - datasheet created on Dec-2007. Retrieved from on 03-Dec-2023

Nomenclature and Basic Information

Species name :

Juglans regiaL.
Published in Sp. Pl. : 997 (1753)

Synonyms :
(basionym or principal syn.)

Juglans fallax Dode
Full list of synonyms : [Euro+Med] [PlantList] [IPNI] [POWO] [Catalogue of Life] []

Plant Family :

Juglandaceae A. Rich ex Kunth (The Walnut Family)
2 species from the Juglandaceae family are recorded from the Maltese Islands.

English name(s) :


Maltese name(s) :

Ġewża, Siġra tal-ġewż

Status for Malta :

Persisting Alien. Introduced species for horticulture (flowering plants) or agriculture (herbs or fruiting trees) usually within the last 2 centuries and persist after their original location or site is abandoned. They do not widespread but usually remain as a single tree or a very localised population.

Frequency :

Data not available - casual or short-lived in the wild from accidental garden or agriculture escape

Growth form :

Raunkiaer lifeform [info]: Macro-Phanerophyte ( high trees usually over 10 m high )
Germination [info]: Dicotyledon

Legal Protection :

Not legally protected till the last update of this website (2/Mar/2022)

Red List (1989) :

Not listed in the Red Data Book of the Maltese Islands

Flowering Time :

April – May

Colour of Flowers:



May cause allergic reactions or irritation in contact with the skin or mucous membranes

Name Derivation :

Juglans: Jupiter’s-nut, Iuglans (glans Jovis) spread around Europe and England by the Romans from their origin forests situated in Gaul, an area today represented by France, Switzerland, Belgium, north-Italy, etc. In old English it was referred as wealh-hnut meaning foreign-nut, hence the common name walnut. (Latin origin )

Planting in rural areas :

Can be planted in rural areas according to ERA Guidelines

Description, Habitat and Distribution
Habitat in Europe: Data will be available in the next update of this website.
Preferred habitat in Malta: Data will be available in the next update of this website.
Botanical Description: Tree up to 30 m; bark grey, smooth, eventually becoming fissured but not scaling. Leaflets 7-9, 6-15 cm, obovate or elliptical, acute or acuminate, glabrescent. Male catkins 5-15 cm. Fruit 4-5 cm, subglobose, green, gland-dotted, glabrous; stone ovoid, acute, wrinkled, easily splitting.
Distributional range: Possibly native in Greece and elsewhere in the Balkan peninsula, widely cultivated for its fruits (Walnuts) and timber and locally naturalized in S. & W. Europe.

Distributional map in Europe
and the Mediterranean region (2018):
Occurrences in Europe.
(from Flora Europaea pre year 1993):
Albania, Austria and Liechtenstein, Bulgaria, Crete, Greece, Italy (excl. Sicily and Sardignia), ex-Jugoslavia, Romania, Sicily and/or Malta, Introduced in  Britain (excl. Northern Ireland and Channel islands), Corse, France (incl. Monaco and Channel Islands but excluding Corse), Switzerland, Spain (incl. Andorra but excl. the Balaerics), Hungary, Portugal, Russia and former USSR, Sardinia, Doubtful in Turkey (European part)
Occurrences in Europe and the Mediterranean region.
(from Euro+Med Checklist, 2019)
  Country codes  
Ab(A) Al Ar dAu(A L) BH Bu Cg Ct Ge Gg(A) Gr Le Mk Rm Sr Tu(A E) [Ab(A) nAE Al Au(A L) nBe(B L) Bl dBl(N) nBr nBu Ca(C) nCo nCr cCs Ct Cy aDa Es nGa(C) Ga(F) nGe nGg nHb nHe Ho cHs nHs(S) Hu nIt cLt Lu nMk cMo No nPo Rf(C) cRf(K) cRm nSa nSi(S) cSk nSl aSu ?Tu(E) Uk(K) cUk(U)]

Links & Further literature (0 papers)

Google Web

Google Images

Google Scholar

Research Gate




Med Checklist

Cat. of Life



World Flora Online

Plants of the World Online

Vienna Virt. Herb.

RBGE Herbarium

KEW Herbarium




Kindly Email if there are papers and publications about local studies or information about this species to be included in the list above.

Species Images (5 images)
   Juglans regia   -   Image Code: JGLRE-0.
   Juglans regia   -   Image Code: JGLRE-1.
   Juglans regia   -   Image Code: JGLRE-2.
   Juglans regia   -   Image Code: JGLRE-3.
   Juglans regia   -   Image Code: JGLRE-4.

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