New records of the genus Orobanche L. (Orobanchaceae) to the Tunisian flora with lectotypification of the name O. rapum-genistae Thuill. Author Mokni, Ridha El University of Monastir, Laboratory of Botany, Cryptogamy and Plant Biology, Faculty of Pharmacy of Monastir, Avenue Avicenna, 5000 - Monastir (Tunisia) & University of Carthage, Laboratory of Forest Ecology, National Research Institute of Rural Engineering, Water and Forests, IRESA, 2080 - Ariana (Tunisia) Author Domina, Gianniantonio Department of Agriculture, Food and Forest Sciences, viale delle Scienze, building 4, I- 90128 Palermo (Italy) gianniantonio.domina@unipa.it Author Barone, Giulio Department of Agriculture, Food and Forest Sciences, viale delle Scienze, building 4, I- 90128 Palermo (Italy) text Adansonia 2023 3 2023-03-06 45 5 73 81 journal article 231583 10.5252/adansonia2023v45a5 e5a68d5f-5654-4937-9636-32a702f4d876 1639-4798 7710026 3. Orobanche gracilis Smith Transactions of the Linnean Society of London 4: 172 ( Smith 1798 ) . LECTOTYPE . — Designated by Foley 2001: 231 , Herb. Smith 1087.11 (no. 1 LINN photo!) . GENERAL DISTRIBUTION. — The range of this species extends almost continuously throughout the Mediterranean area in southern Europe from the Iberian Peninsula in the west to the Black Sea coast in the east, including Anatolia and the Caucasus Mountains. In the North it reaches France , Switzerland , Germany , Austria , and South West Slovakia ( Kreutz 1995 ; Zázvorka 1997 ; Pusch et al. 2001 ; Sánchez Pedraja et al. 2005 ; Domina & Arrigoni 2007 ; Domina & RaabStraube 2010). In North Africa, it occurs in Morocco and Algeria (Domina & Raab-Straube 2010; Dobignard & Chatelain 2013 ), it is here the first record for the Tunisian flora. DISTRIBUTION IN TUNISIA . — Pine forests of Le Kef , area of ‘ Dir’ (NW Tunisia). HOSTS IN TUNISIA . — On Cytisus laniger DC. ( Fig. 2 ) and Genista cinerea (Vill.) DC. ( Fig. 3 ). The individuals growing on Genista cinerea have the characters used to distinguish O. gracilis var. deludens (Beck) A. Pujadas (synonym O. austrohispanica M. J. Y. Foley ) the corolla keeled along dorsal line, reddish veined, pale coloured corollas lacking the shiny red interior typical of O. gracilis s.s. and almost glabrous filaments ( Román et al. 2007 ). As already noted for Orobanche crenata Forrsk. ( Domina 2018 ) this kind of variability of the parasite could be influenced by the different hosts. FIG. 1. — Orobanche alba Willd. in north-eastern Tunisia: A , habit of a flowering plant in its natural habitat parasiting on Thymbra capitata (L.) Cav.; B , C , details of inflorescence and closed flowers. Photographs: R. El Mokni, 9.V.2018. FIG. 2. — Orobanche gracilis Sm. in north-western Tunisia: A , habit of a flowering plant in its natural habitat parasiting on Cytisus laniger DC. ; B , details of scales, inflorescence and opened flowers. Photographs: R. El Mokni, 30.IV.2019. FIG. 3. — Orobanche gracilis Sm. in north-western Tunisia: A , habit of a flowering plant in its natural habitat, parasiting on Genista cinerea (Vill.) DC. ; B , details of scales, inflorescence and opened flowers. Photographs: R. El Mokni, 30.IV.2019. FIG. 4. — Orobanche rapum-genistae Thuill. The specimen G[G00396694] here designated as the lectotype of the name. Credits: Conservatoire et Jardin botaniques de la ville de Genève. HABITAT. — On roadsides and edges within pine forests, on clayey soils of sunny places. FLOWERING PERIOD. — April to May. SPECIMEN SEEN. — Tunisia . Orobanche gracilis var. gracilis , Le Kef North, 36°10’14”N , 008°43’55”E , 625 m a.s.l., on Cytisus laniger , 30.IV.2019 , G. Domina & R. El Mokni s.n. (PAL, Herb. Univ. Monastir ). — O. gracilis var. deludens , Le Kef North, 36°10’14”N , 008°43’55”E , 625 m a.s.l., on Genista cinerea , 30.IV.2019 , R. El Mokni s.n. (Herb. Univ. Monastir ).