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Issue: Vol. 705 No. 2: 13 Jun. 2025
Type: Article
Published: 2025-06-13
DOI: 10.11646/phytotaxa.705.2.7
Page range: 203-211
Abstract views: 197
PDF downloaded: 9

Oenothera L. a new genus of alien plant first reported in the Maltese Islands

National Coalition of Independent Scholars, 2134 Parkview Place, South Bend, Indiana 46616, USA
Department of Biology, Faculty of Science, University of Malta, MSD2080 Msida, Malta
alien species biological invasion floristic record Hartmannia Onagraceae Eudicots

Abstract

The genus Oenothera is extensively naturalized across Europe, owing to its high reproductive capacity, adaptability, and efficient seed dispersal mechanisms. This study reports the first documented occurrence of Oenothera rosea in the Maltese Islands, as well as the first record of the genus Oenothera in the territory. This finding represents a significant addition to the local flora and marks a new record of alien plants. A morphological description of O. rosea and information on its distribution, ecological characteristics, and identification key are provided. The discovery of O. rosea underscores the growing trend of biological invasions in Malta, driven primarily by human activities and mass tourism. Its occurrence in anthropized areas indicates potential for further spread into agricultural landscapes and other human-altered environments, raising concerns about its ecological impact.

References

  1. Abela, G.F. (1647) Della descrittione di Malta: isola nel mare Siciliano con le sue Antichità, ed altre Notizie. Paolo Bonacota, Malta, 573 pp.
  2. Aiton, W. (1789) Hortus kewensis, or, a catalogue of the plants cultivated in the Royal Botanic Garden at Kew 2. George Nicol, London, 460 pp. https://doi.org/10.5962/bhl.title.116053
  3. Barone, G., Bajona, E., Bartolucci, F., Cancellieri, L., Caruso, G., Conti, F., Domina, G., Fascetti, S., Franzoni, J., Laface, V.L.A., Pinzani, L., Rosati, L., Scoppola, A., Stinca, A., Tilia, A. & Crisafulli, A. (2023) Contribution to the floristic knowledge of Lipari and Panarea Islands (Sicilia, Italy). Italian Botanist 16: 59–71. https://doi.org/10.3897/italianbotanist.16.113415
  4. Boccone, P. (1674) Icones et descriptiones rariorum plantarum Siciliae, Melitae, Galliae et Italiae quarum unaquaeque pro-prio charactere signata, ab aliis ejusdem classis facile distin-guitur. Theatro Sheldonianum, Oxford, UK, 96 pp.
  5. Boccone, P. (1697) Museo di piante rare della Sicilia, Malta, Corsica, Italia, Piemonte e Germania. Baptista Zuccato, Venetia, Italy, 130 pp.
  6. Cambria, S., Azzaro, D., Caldarella, O., Aleo, M., Bazan, G., Guarino, R., Torre, G., Cristaudo, A.E., Ilardi, V., La Rosa, A., Laface, V.L.A., Luchino, F., Mascia, F., Minissale, P., Sciandrello, S., Tosetto, L. & Tavilla, G. (2023) New data on native and alien vascular flora of Sicily (Italy): New findings and updates. Plants 12 (9): 1743. https://doi.org/10.3390/plants12091743
  7. Candolle de, P. (1821) Regni Vegetabilis Systema Naturale, sive Ordines, Genera et Species Plantarum Secundum Methodi Naturalis Normas Digestarum et Descriptarum, vol. 2. Treuttel et Würtz, Paris, 745 pp.
  8. Casha, A. (2020) Flora of the Maltese Islands. Self-published, Malta, 387 pp.
  9. Cleland, R.E. (1972) Oenothera cytogenetics and evolution. London & New York: Academic Press, 370 pp.
  10. Chichizola, G.A., Rovere, A.E. & Gonzalez, S.L. (2019) Germination of Oenothera odorata, endemic ruderal Onagraceae from Argentina. Phyton 87: 265–273. https://doi.org/10.32604/phyton.2018.87.265
  11. Crisafulli, A., Picone, R.M. & Soldano, A. (2013) Oenothera indecora (Onagraceae) a neophyte new to Italy. Flora Mediterranea 23: 87–92. https://doi.org/10.7320/FlMedit23.087
  12. Cullen, J., Alexander, J.C.M., Brickell, C.D. & Edmondson, J.R. (1997) The European Garden Flora, Vol. V. Dicotyledons (Part III). Cambridge University Press, Cambridge, UK, 646 pp.
  13. Danin, A. & Fragman-Sapir, O. (2024) Flora of Israel Online. Available from: http://flora.org.il/en/plants/ (accessed 10 December 2024)
  14. Dietrich, W., Wagner, W.L. & Raven, P.H. (1997) Systematics of Oenothera section Oenothera subsection Oenothera (Onagraceae). Systematic Botany Monographs 50: 1–234. https://doi.org/10.2307/25027870
  15. Dietrich, W. (2000) Oenothera L. In: Castroviejo, S., Aedo, C., Benedí, C., Laínz, M., Muñoz Garmedina, F., Nieto Feliner, G. & Pavia, J. (Eds.) Flora Iberica, vol. 8. Real Jardín Botánico, Madrid, pp. 90–100.
  16. Engelmann, G. & Gray, A. (1845) Plantae Lindheimerianae, an enumeration of the plants collected in Texas, and distributed to subscribers, by F. Lindheimer, with remarks, and descriptions of new species. Boston Journal of Natural History 5: 210–264.
  17. Frean, M., Balkwill, K., Gold (nee Anderson), C. & Burt, S. (1997) The expanding distributions and invasiveness of Oenothera in southern Africa. South African Journal of Botany 63 (6): 449–458. https://doi.org/10.1016/S0254-6299(15)30798-5
  18. Galasso, G., Conti, F., Peruzzi, L., Alessandrini, A., Ardenghi, N.M.G., Bacchetta, G., Banfi, E., Barberis, G., Bernardo, L., Bouvet, D., Bovio, M., Castello, M., Cecchi, L., Del Guacchio, E., Domina, G., Fascetti, S., Gallo, L., Guarino, R., Gubellini, L., Guiggi, A., Hofmann, N., Iberite, M., Jiménez-Mejías, P., Longo, D., Marchetti, D., Martini, F., Masin, R.R., Medagli, P., Musarella, C.M., Peccenini, S., Podda, L., Prosser, F., Roma-Marzio, F., Rosati, L., Santangelo, A., Scoppola, A., Selvaggi, A., Selvi, F., Soldano, A., Stinca, A., Wagensommer, R.P., Wilhalm, T. & Bartolucci, F. (2024) A second update to the checklist of the vascular flora alien to Italy. Plant Biosystems 158 (2): 297–340. https://doi.org/10.1080/11263504.2024.2320129
  19. Gonçalves Silva, J.J. & Ferreira, J.P. (2019) First record of the Rose Evening Primrose Oenothera rosea L’ Hér. ex Aiton (Onagraceae) on the island of Madeira (Portugal). Boletim do Museu de História Natural do Funchal 69 (355): 33–38.
  20. Grech Delicata, J.C. (1853) Flora Melitensis, sistens stirpes phanerogames in Melitae insulisque adiacentibus hucusque delectas, secundum systemae Candolleanum digestas. Ex typis F.W. Franz, Melitae, 49 pp. https://doi.org/10.5962/bhl.title.9965
  21. Hamel, T. (2016) Première observation d’une xenophyte Oenothera rosea L’ Hér. ex Aiton (Onagraceae) en Afrique du Nord. Acta Botanica Malacitana 41: 287–289. https://doi.org/10.24310/abm.v41i0.2460
  22. Haslam, S.M., Sell, P.D. & Wolseley, P.A. (1977) A flora of the Maltese Islands. Malta University Press, Msida, Malta, 560 pp.
  23. Hoch, C.P. & Wagner, L.W. (2007) Oenothera L. In: Wu, Z.Y., Raven, P.H. & Hong, D.Y. (Eds.) Flora of China, vol. 13. Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, pp. 423–426.
  24. IPNI. (2024) The International Plant Names Index. Available from: http://www.ipni.org (accessed 11 December 2024)
  25. Lanfranco, E. (1995) The Maltese flora and conservation. Ecologia Mediterranea 21 (1/2): 165–168. https://doi.org/10.3406/ecmed.1995.1763
  26. Linnaeus, C. (1753) Species Plantarum, 1. Impensis Laurentii Salvii, Holmiae, pp. 1–560.
  27. Linnaeus, C. (1755) Centuria I, Plantarum. Reg. Acad. Typogr., Upsaliae, 36 pp.
  28. Manns, U. & Anderberg, A.A. (2009) New combinations and names in Lysimachia (Myrsinaceae) for species of Anagallis, Pelletiera and Trientalis. Willdenowia 39 (1): 49–54. https://doi.org/10.3372/wi.39.39103
  29. Márquez-Flores, Y.K., Meléndez-Camargo, M.E., García-Mateos, N.J., Huerta-Anaya, M.C., Pablo-Pérez, S.S. & Silva-Torres, R. (2018) Phytochemical composition and pharmacological evaluation of different extracts of Oenothera rosea L´Hér. ex Ait (Onagraceae) aerial part. South African Journal of Botany 116: 245–250. https://doi.org/10.1016/j.sajb.2018.04.008
  30. Meiyu, W., Shijun, C. & Liping, L. (2009) Reproductive biology characteristics of invasive alien plant Oenothera rosea. Guangxi Zhiwu / Guihaia 29 (2): 227–230.
  31. Mifsud, S., Lanfranco, S., Lamoliere, A., Mifsud, D., Sciandrello, S., Biondolillo, S., Cambria, S., Tavilla, G. & Minissale, P. (2022) A database of alien plants present in Sicily and Malta: a comparison between two close Mediterranean islands with a common management plan. In: Linder, M. (Ed.) Neobiota 2022—12th International Conference on Biological Invasions. Tartu, Estonia, 12–16 September 2022. Estonian Naturalists’ Society, Tartu, Estonia, pp. 93.
  32. Mihulka, S. & PysÏek, P. (2001) Invasion history of Oenothera congeners in Europe: a comparative study of spreading rates in the last 200 years. Journal of Biogeography 28: 597–609. https://doi.org/10.1046/j.1365-2699.2001.00574.x
  33. Mihulka, S., Pyäek, P. & Martínková, J. (2003) Invasiveness of Oenothera congeners in Europe related to seed characteristics. In: Child, L.E., Brock, J.H., Brundu, G., Prach, K., Pyäek, P., Wade, P.M. & Williamson, M. (Eds.) Plant Invasions: Ecological Threats and Management Solutions. Backhuys Publishers, Leiden, The Netherlands, pp. 213–225.
  34. Munz, P.A. (1959) Flora of Panama. Part VII. Fascicle IV. Annals of the Missouri Botanical Garden 46 (3): 195–256. https://doi.org/10.2307/2394561
  35. Nicotra, L. (1904) Variazioni recenti nella flora messinese. Nuovo Giornale Botanico Italiano n.s. 11 (1): 34–47.
  36. POWO. (2024) Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Available from: https://powo.science.kew.org/ (accessed 10 December 2024)
  37. Pyšek, P., Pergl, J., Essl, F., Lenzner, B., Dawson, W., Kreft, H., Weigelt, P., Winter, M., Kartesz, J., Nishino, M., Antonova, L.A., Barcelona, J.F., Cabezas, F.J., Cárdenas, D., Cárdenas-Toro, J., Castańo, N., Chacón, E., Chatelain, C., Dullinger, S., Ebel, A.L., Figueiredo, E., Fuentes, N., Genovesi, P., Groom, Q.J., Henderson, L., Inderjit, Kupriyanov, A., Masciadri, S., Maurel, N., Meerman, J., Morozova, O., Moser, D., Nickrent, D., Nowak, P.M., Pagad, S., Patzelt, A., Pelser, P.B., Seebens, H., Shu, W., Thomas, J., Velayos, M., Weber, E., Wieringa, J.J., Baptiste, M.P. & Van Kleunen, M. (2017) Naturalized alien flora of the world: species diversity, taxonomic and phylogenetic patterns, geographic distribution and global hotspots of plant invasion. Preslia 89: 203–274. https://doi.org/10.23855/preslia.2017.203
  38. Raab-Straube, E. von. (2018+) Onagraceae. Euro+Med Plantbase—the information resource for Euro-Mediterranean plant diversity. Available from: https://europlusmed.org/cdm_dataportal/taxon/baf02de2-9781-4438-bc37-e61f7377a071 (accessed 10 December 2024)
  39. Raven, P.H. (1968) Oenothera L. In: Tutin, T.G., Heywood, V.H., Burges, N.A., Moore, D.M., Valentine, D.H., Walters, S.M. & Webb, D.A. (Eds.) Flora Europaea, vol. 2. Cambridge University Press, Cambridge, UK, pp. 306–308.
  40. Rostański, K. (1991) The representatives of the genus Oenothera L. in Portugal. Boletim da Sociedade Broteriana 64: 5–33.
  41. Rostański, K. & Verloove, F. (2015) The genus Oenothera (Onagraceae) in Belgium. Dumortiera 106: 12–42.
  42. Silvestre, S. (1987) Onagraceae. In: Valdés, B., Talavera, S. & Fernández-Galiano, E. (Eds.) Flora Vascular de Andalucía Occidental, vol. 2. Ketres, Barcelona, pp. 206–210.
  43. Soldano, A. (2017) Oenothera L. In: Pignatti, S. (Ed.) Flora d’Italia, vol. 3. Edagricole, Milano, pp. 851–859.
  44. Sommier, S. & Caruana Gatto, A. (1915) Flora melitensis nova. Stabilimento Pellas, Firenze, Italy, 502 pp.
  45. Spach, E. (1835a) Histoire naturelle des végétaux phanérogames, vol 4. Librairie Encyclopedique de Roret, Paris, 446 pp. https://doi.org/10.5962/bhl.title.44839
  46. Spach, E. (1835b) Synopsis Monographia Onagrearum. Annales des Sciences Naturelles Botanique ser. 2, 4: 161–178.
  47. Stinca, A., Chianese, G., D’Auria, G., Del Guacchio, E., Fascetti, S., Perrino, E.V., Rosati, L., Salerno, G. & Santangelo, A. (2017) New alien vascular species for the flora of southern Italy. Webbia 72: 295–301. https://doi.org/10.1080/00837792.2017.1349236
  48. Thiers, B.M. (2024 onwards) Index Herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: http://sweetgum.nybg.org/science/ih/ (accessed 10 December 2024)
  49. Tison, J.-M. & de Foucault, B. (2014) Flora Gallica. Biotope, Mèze, xx + 1196 pp.
  50. Tokhtar, V. & Groshenko, S.A. (2014) Differentiation of the Climatic Niches of the Invasive Oenothera L. (Subsect. Oenothera, Onagraceae) Species in the Eastern Europe. Advances in Environmental Biology 8 (10): 529–531.
  51. Zerapha, S. (1827) Flora melitensis thesaurus, sive plantarum enumeratio quae in Melitae Gaulosquae insulis aut indi-genae aut vulgatissimae occurrunt. Fasc. 1, 2. Regia Typo-graphia, Melitae, 56 pp.
  52. Wagner, W., Krakos, K. & Hoch, P.C. (2013) Taxonomic changes in Oenothera sections Gaura and Calylophus (Onagraceae). PhytoKeys 28: 61–72. https://doi.org/10.3897/phytokeys.28.6143
  53. Wagner, W.L., Hoch, P.C. & Raven, P.H. (2007) Revised classification of the Onagraceae. Systematic Botany Monographs 83: 1–240.

How to Cite

Tavilla, G. & Lanfranco, S. (2025) Oenothera L. a new genus of alien plant first reported in the Maltese Islands. Phytotaxa 705 (2): 203–211. https://doi.org/10.11646/phytotaxa.705.2.7