Umbilicus horizontalis (Guss.) DC.

Native to:

Albania, Algeria, Azores, Baleares, Bulgaria, Corse, East Aegean Is., Egypt, Eritrea, Greece, Gulf States, Iran, Italy, Kriti, Lebanon-Syria, Libya, Morocco, Oman, Sardegna, Saudi Arabia, Sicilia, Sinai, Socotra, Spain, Tunisia, Turkey, Yemen, Yugoslavia

POWO follows these authorities in accepting this name:

• Authier, P. & Covillot, J. (2011). Catalogue actualisé des plantes de l'île de Rhodes (Grèce). Saussurea; Travaux de la Société Botanique de Genève 41: 131-170.
• Bergmeier, E., Blockeel, T., Böhling, N., Fournaraki, C., Gotsiou, P., Jahn, R., Lansdown, R. & Turland, N. (2011). An inventory of the vascular plants and bryophytes of Gavdopoula island (S Aegean, Greece) and its phytogeographical significance. Willdenowia 41: 179-189.
• Boulos, L. (1999). Flora of Egypt 1: 1-419. Al Hadara Publishing, Cairo.
• Davis, P.H. (ed.) (1972). Flora of Turkey and the East Aegean Islands 4: 1-657. Edinburgh University Press, Edinburgh.
• Dobignard, A. & Chatelain, C. (2011). Index synonymique de la flore d'Afrique du nord 3: 1-449. Éditions des conservatoire et jardin botaniques, Genève.
• Gallo, L. (2014). Past presence of Sedum rubens and Umbilicus horizontalis (Crassulaceae) in the flora of Eritrea. Webbia; Raccolta de Scritti Botanici 69: 291-293.
• Ghazanfar, S.A. (2007). Flora of Oman 2: 1-220. National Botanic Garden of Belgium, Meise.
• Hansen, A. & Sunding, P. (1993). Flora of Macaronesia. Checklist of vascular plants. 4. revised edition. Sommerfeltia 17: 1-295.
• Jalas, J., Suominen, J., Lampinen, R. & Kurtto, A.(eds.) (1999). Atlas Florae Europaeae. Distribution of vascular plants in Europe 12: 1-250.
• Jongbloed, M., Western, R.A. & Boer, B. (2000). Annotated Check-list for plants in the U.A.E.: 1-90. Zodiac Publishing, Dubai.
• Llewellyn, O.A., Hall, M., Miller, A.G., Al-Abbasi, T.M., Al-Wetaid, A.H., Al-Harbi, R.J. & Al-Shammari, K.F. (2011). Important plant areas in the Arabian peninsula: 4. Jabal Aja. Edinburgh Journal of Botany 68: 199-224.
• Miller, A.G. & Cope, T.A. (1996). Flora of the Arabian peninsula and Socotra 1: 1-586. Edinburgh university press.
• Miller, A.G. & Morris, M. (2004). Ethnoflora of Soqotra Archipelago: 1-759. The Royal Botanic Garden, Edinburgh.
• Schäfer, H. (2021). Flora of the Azores a field guide: 1-445. Margraf Publishers GmbH.

Flora of Iraq

• DC., Prodr. 3: 400 (1828).

Kew Backbone Distributions

• Authier, P. & Covillot, J. (2011). Catalogue actualisé des plantes de l'île de Rhodes (Grèce). Saussurea; Travaux de la Société Botanique de Genève 41: 131-170.
• Boulos, L. (1999). Flora of Egypt 1: 1-419. Al Hadara Publishing, Cairo.
• Davis, P.H. (ed.) (1972). Flora of Turkey and the East Aegean Islands 4: 1-657. Edinburgh University Press, Edinburgh.
• Dobignard, A. & Chatelain, C. (2011). Index synonymique de la flore d'Afrique du nord 3: 1-449. Éditions des conservatoire et jardin botaniques, Genève.
• Gallo, L. (2014). Past presence of Sedum rubens and Umbilicus horizontalis (Crassulaceae) in the flora of Eritrea. Webbia; Raccolta de Scritti Botanici 69: 291-293.
• Jongbloed, M., Western, R.A. & Boer, B. (2000). Annotated Check-list for plants in the U.A.E.: 1-90. Zodiac Publishing, Dubai.
• Llewellyn, O.A., Hall, M., Miller, A.G., Al-Abbasi, T.M., Al-Wetaid, A.H., Al-Harbi, R.J. & Al-Shammari, K.F. (2011). Important plant areas in the Arabian peninsula: 4. Jabal Aja. Edinburgh Journal of Botany 68: 199-224.
• Mateos, M.A. & Valdés, B. (2009). Catálogo de la flora vascular del Rif occidental calizo (N de Marruecos). I Selaginellaceae - Rosaceae. Lagascalia 29: 105-257.
• Miller, A.G. & Cope, T.A. (1996). Flora of the Arabian peninsula and Socotra 1: 1-586. Edinburgh university press.
• Miller, A.G. & Morris, M. (2004). Ethnoflora of Soqotra Archipelago: 1-759. The Royal Botanic Garden, Edinburgh.
• Tutin, T.G. & al. (eds.) (1993). Flora Europaea ed. 2, 1: 1-581. Cambridge University Press.

Flora of Somalia

• Flora Somalia, Vol 1, (1993) Author: by M. Thulin [updated by M. Thulin 2008]