A taxonomic overview of Orchis sect. Robustocalcare (Orchidaceae) Author Calevo, Jacopo 0000-0002-1717-2365 Department of Biology, University of Naples Federico II, Via Cinthia, Campus Monte Sant’Angelo, building 7, 80126, Naples, Italy & Royal Botanic Gardens, Kew, Richmond TW 9 3 DS, Surrey, UK & jacopo. calevo @ gmail. com; https: // orcid. org / 0000 - 0002 - 1717 - 2365 jacopo.calevo@gmail.com Author Christenhusz, Maarten J. M. Royal Botanic Gardens, Kew, Richmond TW 9 3 DS, Surrey, UK & Department of Environment and Agriculture, Curtin University, Perth, WA 6102, Australia Author Fay, Michael F. Royal Botanic Gardens, Kew, Richmond TW 9 3 DS, Surrey, UK & University of Western Australia, Crawley, WA 6009, Australia text Phytotaxa 2023 2023-04-18 592 2 157 162 http://dx.doi.org/10.1094/PDIS-04-22-0755-PDN journal article 10.11646/phytotaxa.592.2.10 d06a326d-2978-4e4a-8254-ed4b0318a8cf 1179-3163 7840332 Orchis ×fallax (De Not.) Willk. in M.Willkomm & J.M.C.Lange, Prodr. Fl. Hispan. 1: 168 (1861). (= O. patens subsp. brevicornis × O. provincialis ) Type :— ITALY . Liguria : Municipality of Genua , S . Rocco & Portofino Kulm , boschi di castagni, 10 Feb 1909 , Guiseppe Bevilacqua s.n. ( neotype : GDOR1396016 /13!, designated here ; no original material was cited by De Notaris 1844 ) . Basionym: Orchis brevicornis var. fallax De Not., Repert. Fl. Ligust . : 385 (1844). Homotypic synonyms: Orchis patens var. fallax (De Not.) Rchb.f. in H . G . L .Reichenbach, Icon. Fl. Germ. Helv. 13–14: 38 (1851); Orchis brevicornis subsp. fallax (De Not.) Nyman, Consp. Fl. Eur . : 694 (1882) ; Androrchis fallax (De Not.) W.Foelsche & Jakely, J. Eur. Orch. 41: 355 (2009). Heterotypic synonyms: Orchis ×subpatens E.G.Camus in E . G .Camus & A . A .Camus, Iconogr. Orchid. Europe : 271 (1928) . Type :— ITALY . Genua , Bergon (not found) . Orchis ×kelleri Hunz. ex G.Keller & Soó, Repert. Spec. Nov. Regni Veg. Sonderbeih. A 2: 166 (1932), nom. inval., pro syn., as ‘kellerii’; Orchis ×clandestina Hautz., Ann. Naturhist. Mus . Wien 81: 40 (1978). Type :— ITALY . Liguria : Lavagna-Santa Giulia , 1 May 1974 , L . Hautzinger s.n. ( holotype : W , not seen; isotypes: K-000796424!, SZU ) . Distribution:— North-western Italy , Liguria . Note:— This natural hybrid ( Fig. 1a ) is morphologically intermediate between O. provincialis and O. patens subsp. brevicornis .