Verbascum mairei (Murb.) Hub.-Mor., in Bauhinia 5(1): 13. 1973.

Khamar, Hamid, Oualidi, Jalal El, Touhami, Amina Ouazzani & Civeyrel, Laure, 2023, Nomenclature and typification in Verbascum (Scrophulariaceae) from North Africa, PhytoKeys 225, pp. 115-152 : 115

Verbascum mairei (Murb.) Hub.-Mor., in Bauhinia 5(1): 13. 1973.

Celsia mairei ≡ Celsia mairei Murb., Lunds Univ. Arsskrift, 2 n. f., 35(1): 59. 1939. Type: [Morocco]. Tafriat Banks by roadside, 3.000 ft, 10 July 1936, E.K. Balls, B2792 (lectotype, designated here: S [S10-27049]!; isolectotype: RAB [RAB30643]!). [Morocco]. Moyen Atlas, Roches calcaires à Tizi-n-Ouria (supra Ksiba), 1600 m, 21 Juin 1936, R. Maire s.n. (residual syntype: MPU [MPU059317]!). [image of lectotype available at https://plants.jstor.org/stable/viewer/10.5555/al.ap.specimen.s10-27049]

Notes.

In the protologue of Celsia mairei [≡ Verbascum mairei (Murb.) Hub.-Mor.], Murbeck (1939) cited two gatherings: "Imper. Maroccanum: In rupestribus calcareis Atlantis Medii ad Tizi-n-Ouria (supra Ksiba), 1600 m, R. Maire, 21/6/1936" and "Tafriat, 3000 ft., some 50 or 60 km out of Marrakesh on the road to Ouarzazat across the Great Atlas by Tadert and the Tizi n’ Tichka, E.K. Balls, 10 /7/ 1936, n. 2792". However, he did not give any information about herbaria housing the original samples, nor did he indicate which one is the holotype.

The search for the original material of Celsia mairei led us to discover three sheets kept at Herbs MPU, RAB, and S. The sheet kept at Herb. MPU was collected by R. Maire (Barcode MPU059317), but those found at Herb. S (Barcode S10-270499) and at Herb. RAB (RAB30643) were collected by E.K. Balls. All three specimens found are morphologically in agreement with the original description (Murbeck, 1939). Moreover, collection locations indicated on the labels match those indicated in the protologue. Following Art. 9.6 of the ICN ( Turland et al. 2018), these specimens must be considered as syntypes. According to its quality of conservation, the sheet S10-27049 preserved at Herb. S is here selected as the lectotype, because it is well-conserved and shows more diagnostic features described in the protologue. The specimen housed at Herb. RAB is recognized here as an isolectotype.