by Stephen Mifsud
   13 Jun 2024      ()
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Umbilicus horizontalis   (Narrow Navelwort)

Umbilicus horizontalis  (CRASSULACEAE.) 
Images for this profile are taken from the Maltese Islands after year 2000.

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Profile Date Nov-2007 (taxon update: none)
Citation for this page Mifsud, S. (2022). Umbilicus horizontalis - datasheet created on Nov-2007. Retrieved from on 13-Jun-2024

Nomenclature and Basic Information

Species name :

Umbilicus horizontalisDC.
Published in Prodr. 3: 400 (1828)

Synonyms :
(basionym or principal syn.)

Umbilicus intermedium
Full list of synonyms : [Euro+Med] [PlantList] [IPNI] [POWO] [Catalogue of Life] []

Plant Family :

Crassulaceae DC. (The Stonecrop Family)
16 species from the Crassulaceae family are recorded from the Maltese Islands.

English name(s) :

Narrow Navelwort, Pennywort

Maltese name(s) :

Żokret l-għaġuża

Status for Malta :

Indigenous. Present on the Maltese islands before man

Frequency :

Very Common     Common    Frequent     Scarce     Rare    Very rare    Extinct

Growth form :

Raunkiaer lifeform [info]: GEOPHYTE ( bearing underground bulbs, rhizomes, stolons, etc. )
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:

Pink or Red


Not particularly toxic

Name Derivation :

horizontalis: Lying or arranged horizontally with refeence to the flowers arranged perpendicular (and hence horizontal) to the flowering stalk. (Greek origin )

Planting in rural areas :

Can be planted in rural areas according to ERA Guidelines

Description, Habitat and Distribution
Habitat in Europe: Rocks and walls
Preferred habitat in Malta: Data will be available in the next update of this website.
Botanical Description: Stem 20-50 cm, erect. Basal leaves orbicular, peltate, concave above, sinuate-crenate; cauline leaves cauline leaves more numerous and crowded, many of them usually linear and progressively smaller distally. Bracts usually linear, about equalling the pedicels, but occasionally large and leaf-like. Pedicels 3-9 mm. Flowers up to 7mm, tubular, subsessile, mostly horizontal (few pendent); raceme fairly dense, sometimes branched at the base, occupying less or about ½ the stem. Sepals ovate, acuminate. Corolla whitish-green or straw-coloured, sometimes tinged with pink; corolla-lobes triangular, lanceolate, acuminate, dull crimson. Carpels tapered to a fairly long style.
Chromosome number: 2n=24
Distributional range: Mediterranean region, Bulgaria and Azores.

Distributional map in Europe
and the Mediterranean region (2018):
Occurrences in Europe.
(from Flora Europaea pre year 1993):
Albania, the Azores, the Balaeric Islands, Bulgaria, Corse, Crete, Greece, Spain (incl. Andorra but excl. the Balaerics), Italy (excl. Sicily and Sardignia), ex-Jugoslavia, Sardinia, Sicily and/or Malta
Occurrences in Europe and the Mediterranean region.
(from Euro+Med Checklist, 2019)
  Country codes  
? AE(G) Al Az(C F G J L M P S T) BH Bu Cg Co Cr Ct Cy Eg Gr It Sa Si(M S) Sn

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 (7 images)
   Umbilicus horizontalis   -   Image Code: UMBHZ-0.
   Umbilicus horizontalis   -   Image Code: UMBHZ-1.
   Umbilicus horizontalis   -   Image Code: UMBHZ-2.
   Umbilicus horizontalis   -   Image Code: UMBHZ-3.
   Umbilicus horizontalis   -   Image Code: UMBHZ-4.
   Umbilicus horizontalis   -   Image Code: UMBHZ-5.
   Umbilicus horizontalis   -   Image Code: UMBHZ-6.

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