Delforge, P. & Delforge-Onckelinx, C. 2017.- Contribution à la connaissance des Orchidées de la presqu'île de Methana et de l'île de Poros (Golfe saronique, Attique, Grèce). Natural. belges 98 (Orchid. 30): 69-172.

Abstract. Delforge, P. & Delforge-Onckelinx, C. 2017.- Contribution to the knowledge of the Orchids of the Methana peninsula and the island of Poros (Saronic Gulf, Attiki, Greece) Natural. belges 98 (Orchid. 30): 69-172.
A presentation of the geology, the geomorphology, the climate, the vegetation, the human impact over the landscape of the Methana peninsula and the island of Poros is provided. A review of the past and present studies and research about their orchids is presented. It appears that 20 orchids species were known for Methana peninsula before 2014 (Table 1), and probably none for Poros. Research on Methana in March and April 2014 has revealed 36 orchid species for the peninsula, bringing their number up to 38 (Table 1). Research on Poros has revealed 10 species for the island (Table 2). First mentions are made in the Methana peninsula for Cephalanthera longifolia, Dactylorhiza romana, Herorchis boryi, H. picta var. skorpilii, Ophrys cephaloniensis, O. cerastes, O. cinereophila, O. crassicornis, O. hellenica, O. leucadica, O. mammosa, O. mycenensis, O. phryganae, O. punctulata, O. spruneri, O. taigetica, O. ulyssea, Orchis provincialis, O. quadripunctata, Paludorchis palustris var. elegans, Serapias parviflora, and Vermeulenia papilionacea var. aegaea. After careful examination of “critical” plants as well as photographies, published or not, it appears that old or recent mentions of orchids, made for Methana, are questionable or erroneous. Mentions of Anacamptis morio, Ophrys cornuta, O. fusca, O. lutea, O. oestrifera subsp. schlechteriana, O. tenthredinifera, and Orchis anatolica probably concern, respectively, Herorchis picta var. skorpilii, Ophrys cerastes, O. punctulata, O. sicula var. transadriatica, O. mycenensis, O. villosa, and Orchis quadripunctata. The species found on Poros in 2014 are Anacamptis pyramidalis var. brachystachys, Ophrys cinereophila, O. hellenica, O. leptomera, O. leucadica, O. mammosa, O. sicula var. transadriatica, O. villosa, Serapias bergonii, and Vermeulenia papilionacea var. aegaea.
A list of 36 species and 3 hybrids, and 41 distribution maps, based on previous localizable records, published or not, and on the presence in March and April 2014 in 51 utmwgs84 squares of 1 km
× 1 km, are provided as well as a list of 93 sites prospected.


Key-Words:
Flora of Greece, Aegean, Saronic Gulf, Attiki, Methana peninsula, island of Poros; Orchidaceae