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 L . sect. Robustocalcare Hautz., Ann. Naturhist. Mus . Wien 81: 35. 1977 . (Hautzinger 1977). Type : Orchis spitzelii Saut. ex W.D.J.Koch Key to the species of Orchis section Robustocalcare (modified from Kretzschmar et al . 2007) 1a. Lateral sepals spotted adaxially, green or partly green; known from Europe, northern Africa, western Asia ................................... 2 1b. Lateral sepals without spots, partly green; known only from the Canary Islands ........................................................ O. canariensis 2a. Side lobes of the lip without or with only a few spots ....................................................................................................................... 3 2b. Side lobes of the lip with spots........................................................................................................................................................... 4 3a. Spur thick and straight........................................................................................................................................................................ 5 3b. Spur bent down and pointed at the end, endemic of Crete .................................................................... O. spitzelii subsp. nitidifolia 4a. Lip faintly trilobed, lip creased centrally .................................................................................................. O. spitzelii subsp. spitzelii 4b. Lip clearly trilobed, slightly creased centrally, making it appear broader .......................................... O. spitzelii subsp. cazorlensis 5a. Inflorescence often lax; leaves weakly spotted; Liguria , Italy .............................................................. O. patens subsp. brevicornis 5b. Inflorescence denser; leaves without spots; North Africa ............................................................................. O. patens subsp. patens