Abstract
Parietaria cornuta, a new therophyte species, is described and illustrated from rocky habitats of the Anti-Atlas (Morocco). This species presents a highly original female perianth feature within the genus, with a horned base, whereas the other characters clearly refer to the genus (e.g., leaf shape and phyllotaxy, inflorescence in clusters of polygamous axillary flowers, female perianth free from the ovary, one achene per flower, achene shape). Its ecology, distribution, and conservation status are discussed.
References
- APD. (2025) African Plant Database. Conservatoire et Jardin botaniques, Genève; South African National Biodiversity Institute, Pretoria. Available from: https://africanplantdatabase.ch/ (accessed 21 April 2025)
- Becherer, A. (1935) Note sur deux espèces d’Asplenium. Candollea 6: 22–24.
- Benabid, A. & Cuzin, F. (1997) Populations de dragonnier (Dracaena draco L. subsp. ajgal Benabid et Cuzin) au Maroc: valeurs taxinomique, biogéographie et phytosociologiques. Compte-Rendu de l’Académie des Sciences de Paris, Sciences de la vie 320: 267–277.
- Burman, N.L. (1768) Flora indica: cui accedit series zoophytorum indicorum, nec non prodromus florae capensis. apud Cornelium Haek, Amstelaedami [Amsterdam], 260 + 32 pp. [https://www.biodiversitylibrary.org/item/123275#page/508/mode/1up]
- Dandy, J.E. (1965) Soleirolia soleirolii (Req.) Dandy. In: Heywood, V.H. (Ed.) Flora Europaea, notulae systematicae ad floram Europaeam spectantes. Feddes Repertorium 70(1–3): 4–6.
- Dobignard, A. & Chatelain, C. (2013) Index synonymique de la flore d’Afrique du Nord. Dicotyledoneae: Oleaceae - Zygophyllaceae. Vol. 5. Conservatoire et Jardin Botaniques de Genève, ECWP, Genève, 451 pp.
- Durieu de Maisonneuve, M.C. (1847) Revue botanique. Recueil mensuel consacré principalement à l'analyse des travaux publiés en France et à l'étranger sur la botanique, et sur ses applications à l'horticulture, l'agriculture, et la médecine, etc. 2. A. Franck, Paris, 592 pp.
- El Oualidi, J. (1999) Parietaria L. In: Fennane, M., Ibn Tattou, M., Mathez, J., Ouyahya, A. & El Oualidi, J. (Eds.) Flore pratique du Maroc, Pteridophyta, Gymnospermae, Angiospermae (Lauraceae - Neuradaceae). Vol. 1. Travaux de l’Institut Scientifique, série botanique 36, Rabat, p. 128.
- Emberger, L. (1955) Une classification biogéographique des climats. Recherches et Travaux du Laboratoire de Botanique, de Géologie et de Zoologie, série Botanique No 7. Faculté des Sciences de Montpellier, Montpellier, pp. 3–43.
- Fennane, M. & Ibn Tattou, M. (2005) Flore vasculaire du Maroc. Inventaire et chorologie. Vol. 1. Travaux de l’Institut Scientifique, Série Botanique No. 37, Rabat, 483 pp.
- Fennane, M. (2021) Livre rouge de la flore vasculaire du Maroc. Travaux de l’Institut Scientifique, Série Botanique, No. spécial, Rabat, 750 pp.
- Friis, I. (1993) Urticaceae. In: Kubitzki, K., Rohwer, G. & Bittrich, V. (Eds.) The families and genera of vascular plants. Flowering Plants, Dicotyledons, Magnoliid, Hamamelid and Caryophyllid families. Vol. 2. Springer, Heidelberg, pp. 612–630.
- Gaudichaud-Beaupré, C. (1826–1830) Voyage autour du monde, entrepris par ordre du roi. Exécuté sur les corvettes de S.M. l'Uranie et la Physicienne, pendant les années 1817, 1818, 1819 et 1820, Vol. 4. Pillet Aîné, Paris, 522 pp. https://doi.org/10.5962/bhl.title.152367
- Hadiah, J.T., Conn, B.J. & Quinn, C.J. (2008) Infra-familial phylogeny of Urticaceae, using chloroplast sequence data. Australian Systematic Botany 21 (5): 375–385. https://doi.org/10.1071/SB08041
- IUCN. (2024) Guidelines for using the IUCN red list categories and criteria. Version 16. IUCN Standards and Petitions Committee, Gland, 122 pp.
- Jarmolenko, A.V. (1941) An attempt at the construction of a system of the genus Parietaria and related forms (materials for a monograph). Acta Instituti Botanici Nomine V. L. Komarovii Academiae Scientiarum U.R.S.S., Serie 1 (5): 319–330. [In Russian]
- Linnaeus, C. (1753) Species Plantarum 2. Impensis Laurentii Salvii, Holmiae, 1052 pp. https://doi.org/10.5962/bhl.title.37656
- Linnaeus, C. (1763) Species Plantarum 2. Ed. 2. Impensis Laurentii Salvii, Holmiae, 1684 pp. https://doi.org/10.5962/bhl.title.11179
- Mateos, M.A. & Valdés, B. (2003) Nuevos taxones para el Rif occidental. I. Lagascalia 23: 133–156.
- Maire, R., Weiller, M. & Wilczek, E. (1935) Sertulum austro-maroccanum. Bulletin de la Société d’Histoire Naturelle de l’Afrique du Nord 26: 120–122.
- Mathez, J. (1986) Parietaria lusitanica L. In: Greuter, W. & Raus, T. (Eds.) Med-checklist Notulae 12. Willdenowia 15: 431.
- Peng, S.-C., Hsieh, S.-I., Lee, C.-T., Ho, G.-G., Leou, C.-S. & Yeh, C.-L. (2012) Parietaria taiwania sp. nov. (Urticaceae) from Taiwan. Nordic Journal of Botany 30 (6): 680–683. https://doi.org/10.1111/j.1756-1051.2012.01484.x
- POWO. (2025) Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Available from: https://powo.science.kew.org/ (accessed 15 January 2025).
- Presseq, B. (2016) Sur la présence de l’Helxine, Soleirolia soleirolii (Req.) Dandy, (Urticaceae) à Toulouse. Isatis 16: 127–129.
- Requien, E. (1825) Observations sur quelques plantes rares ou nouvelles de la Flore Française. Annales des Sciences Naturelles (Paris) 5: 381–187. [https://www.biodiversitylibrary.org/page/2430192#page/387/mode/1up]
- Roux, G., Debrach, J. & Gaussen, H. (1949) Précipitations annuelles. Atlas du Maroc No. 4a. Comité de Géographique du Maroc, Rabat.
- Schüßler, C., Bräuchler, C., Reyes-Betancort, J.A., Koch, M.A. & Thiv, M. (2019) Island biogeography of the Macaronesian Gesnouinia and Mediterranean Soleirolia (Parietarieae, Urticaceae) with implications for the evolution of insular woodiness. Taxon 68 (3): 537–556. https://doi.org/10.1002/tax.12061
- Schüßler, C. (2020) No tertiary relicts? A biogeographical study on the Macaronesian laurel forest species in Daucus (Apiaceae), Geranium (Geraniaceae), Gesnouinia (Urticaceae), Phyllis (Rubiaceae), Semele (Asparagaceae) and Visnea (Pentaphylacaceae). Thesis, Combined Faculty of Natural Sciences and Mathematics of the Ruperto Carola University Heidelberg, Heidelberg, 160 pp.
- Sprengel, C.P.J. (1827) Systema vegetabilium, ed. 16, 4 (2). Dieterich, Gottingae, 939 pp. https://doi.org/10.5962/bhl.title.822
- Thiers, B. (2025 [continuously updated]) Index Herbariorum. New York Botanical Garden. Available from: http://sweetgum.nybg.org/science/ih/ (accessed 21 April 2025).
- WFO. (2025) World Flora Online. Available from: http://www.worldfloraonline.org/ (accessed 17 July 2025).
- Wu, Z.-Y., Monro, A.K., Milne, R.I., Wang, H., Yi, T.-S., Liu, J. & Li, D.-Z. (2013) Molecular phylogeny of the nettle family (Urticaceae) inferred from multiple loci of three genomes and extensive generic sampling. Molecular Phylogenetics and Evolution 69 (3): 814–827. https://doi.org/10.1016/j.ympev.2013.06.022
- Wu, Z.-Y., Liu, J., Provan, J., Wang, H., Chen, C.-J., Cadotte, M.W., Luo, Y.-H., Amorim, B.S., Li, D.-Z. & Milne, R.I. (2018) Testing Darwin’s transoceanic dispersal hypothesis for the inland nettle family (Urticaceae). Ecology Letters 21 (10): 1515–1529. https://doi.org/10.1111/ele.13132
- Yıldırım, H. (2015) Parietaria semispeluncaria (Urticaceae), a new species from eastern Turkey. Phytotaxa 226 (3): 281–287. https://doi.org/10.11646/phytotaxa.226.3.9
