Nomenclature and typification in Verbascum (Scrophulariaceae) from North Africa Author Khamar, Hamid https://orcid.org/0000-0001-6008-3264 Department of Botany and Plant Ecology, Scientific Institute, University Mohammed V in Rabat, B. P. 703, Rabat 10106, Morocco khamarhamid90@gmail.com Author Oualidi, Jalal El Department of Botany and Plant Ecology, Scientific Institute, University Mohammed V in Rabat, B. P. 703, Rabat 10106, Morocco Author Touhami, Amina Ouazzani Plant, Animal Productions and Agro-industry Laboratory, Department of Biology, Faculty of Sciences, Ibn Tofail University, B. P. 133 14000, Kenitra, Morocco Author Civeyrel, Laure Laboratoire Evolution & Diversite Biologique (EDB UMR 5174), Universite de Toulouse, CNRS, IRD, UPS. 118 route de Narbonne, Bat 4 R 1, 31062 Toulouse cedex 9, France text PhytoKeys 2023 2023-04-27 225 115 152 http://dx.doi.org/10.3897/phytokeys.225.99356 journal article http://dx.doi.org/10.3897/phytokeys.225.99356 1314-2003-225-115 AB75E2E9609C5A7583F34B48EA61B976 Verbascum letourneuxii Asch. ex Asch. & Schweinf., Ill. Fl. Egypt 2: 189 & 114. 1887. Verbascum spinosum = Verbascum spinosum Delile, Fl. AEg. Illustr.: 55. 1813; non L. Cent. II. plant.: 10. 1756. & Amoen. Acad. IV: 307. 1759. Verbascum marniaricum = Verbascum marniaricum Letournex ap. Barbey Herboris, au Levant: 148. 1882, nom. nud. Verbascum tourneuxii = Verbascum tourneuxii Aschers., ap. Barbey 1. C: 182, nom. nud.. Aschers., ap. Aschers. & Schweinf. Illustr. l'I . d. Egypt. in Mem . Instit. Egypt., II: 114. 1887. Type . [ Egypt ]. In apricis calcareo-argillosis prope Oum Rakoumi et Matrouka in Marmorica ad limites Cyrenaicae , April 1879 , A. Letourneux , s.n. ( lectotype , designated here: G [G00015113]!; isolectotype: W [W1889-0043225]!, G [G00015111, G00015112, G00015114]!, S [S10-27120]!, K [K000975868]!, P [P03417358, P03417357, P03417360, P03417361]!). [image of lectotype available at https://plants.jstor.org/stable/viewer/10.5555/al.ap.specimen.g00015113] . Notes. Ascherson (in Ascherson and Schweinfurth 1887 ) described Verbascum letourneuxii on the basis of specimens separately collected by Ehrenberg and A. Letourneux from the Alexandria region in the north of Egypt. Within the protologue Ascherson and Schweinfurth (1887) confess that the specimen brought by Ehrenberg only constitutes a skeleton of a plant in fruit, while specimens collected by Letourneux, from a few kilometers from the collection locality of Ehrenberg, are well-developed specimens. However, the authors did not indicate the name of the herbarium housing the type specimen. According to Stafleu and Cowan (1976-1988) , the original material of Ehrenberg, Letourneux, Ascherson and Schweinfurth were kept at Herbs B, C, G, K, L, LE, P, S, and W. Nevertheless, the Berlin (B) herbarium was bombed during World War II on the night of 1-2 March 1943 ( Hiepko 1987 ); hence, a good part of the authors' collection has been lost ( Stafleu and Cowan 1976-1988 ). Based on the type specification given in the protologue (locality, collector, and collection date), eleven sheets were traced in different herbaria belonging to the Letourneux collections: W (W1889-0043225), G (G00015111, G00015112, G00015113, G00015114), S (S10-27120), K (K000975868), and P (P03417358, P03417357, P03417360, P03417361). Since the type has not been specified, all of the specimens are to be recognized as syntypes according to Art. 9.6 of the ICN ( Turland et al. 2018 ). The sheet G00015113 preserved at Herb. G is here designated as lectotype for the name V. letourneuxii , since it is the specimen that shows the best quality of preservation of the important diagnostic features.