Umbilicus horizontalis(Guss.) DC.

Horizontal navelwortnarrow navelwort

WFO wfo-0000415393 Accepted WFO 2026-06 8 photographs CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Umbilicus horizontalis, photographed by Grzegorz Grzejszczak
fig. a Grzegorz Grzejszczak, CC BY-SA 4.0 / 2022-03-13 / obs. 201198381
Umbilicus horizontalis, photographed by Flora_DUMO
fig. b Flora_DUMO, CC BY 4.0 / obs. 175795231
Umbilicus horizontalis, photographed by Aissa Djamel Filali
fig. c Aissa Djamel Filali, CC BY-SA 4.0 / obs. 125740127
Umbilicus horizontalis, photographed by Eleftherios Katsillis
fig. d Eleftherios Katsillis, CC BY 4.0 / obs. 114299959
Umbilicus horizontalis, photographed by Eleftherios Katsillis
fig. e Eleftherios Katsillis, CC BY 4.0 / obs. 113008501
Umbilicus horizontalis, photographed by Eleftherios Katsillis
fig. f Eleftherios Katsillis, CC BY 4.0 / obs. 112110387
Umbilicus horizontalis, photographed by Daniel Cahen
fig. g Daniel Cahen, CC BY 4.0 / obs. 35760201
Umbilicus horizontalis, photographed by Ronald Flipphi
fig. h Ronald Flipphi, CC BY-SA 4.0 / obs. 39338421

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.

Native range 28 botanical countries

Regions where Umbilicus horizontalis is native: Algeria, Azores, Egypt, Eritrea, Libya, Morocco, Socotra, Tunisia, East Aegean Is., Gulf States, Iran, Lebanon-Syria, Oman, Saudi Arabia, Sinai, Türkiye, Yemen, Albania, Baleares, Bulgaria, Corse, Greece, Italy, Kriti, NW. Balkan Pen., Sardegna, Sicilia, Spain AlgeriaEgyptEritreaLibyaMoroccoTunisiaEast Aegean Is.Gulf StatesIranLebanon-SyriaOmanSaudi ArabiaSinaiTürkiyeYemenAlbaniaBulgariaCorseGreeceItalyKritiNW. Balkan Pen.SiciliaSpain AzoresBalearesSardegna
Native distribution of Umbilicus horizontalis, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
Albania ALB EUROPE
Baleares BAL
Bulgaria BUL
Corse COR
Greece GRC
Italy ITA
Kriti KRI
NW. Balkan Pen. YUG
Sardegna SAR
Sicilia SIC
Spain SPA
East Aegean Is. EAI ASIA-TEMPERATE
Gulf States GST
Iran IRN
Lebanon-Syria LBS
Oman OMA
Saudi Arabia SAU
Sinai SIN
Türkiye TUR
Yemen YEM
Algeria ALG AFRICA
Azores AZO
Egypt EGY
Eritrea ERI
Libya LBY
Morocco MOR
Socotra SOC
Tunisia TUN

Not drawn on the map: Socotra. We hold no public-domain boundary for this region, so it is listed rather than guessed at.

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Flowering 41 in flower of 156 examined

Peak flowering in Jun. Each bar is the share of Umbilicus horizontalis observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 41 of 156 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 5 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Also published as 9 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.

  • Cotyledon horizontalis Guss.
  • Cotyledon peltata J.C.Wendl.
  • Cotyledon pendulina Batt.
  • Cotyledon pendulina (DC.) Vierh.
  • Cotyliphyllum horizontale (Guss.) Link
  • Umbilicus maroccanus Gand.
  • Umbilicus pendulinus var. horizontalis (Guss.) Post
  • Umbilicus rodriguezii Gand.
  • Umbilicus rupestris subsp. horizontalis (Guss.) O.Bolòs & Vigo

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.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

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