207 PHYTOLOGIA BALCANICA 23 (2): 207 – 269, Sofia, 2017 Additions to the flora of the Prespa National Park, Greece Arne Strid 1 , Erwin Bergmeier 2 , Fanourios-Nikolaos Sakellarakis 3 , Yannis Kazoglou 4 , Michael Vrahnakis 5 & Georgios Fotiadis 6 1 Bakkevej 6, DK-5853 Ørbæk, Denmark, e-mail: arne.strid@youmail.dk (corresponding author) 2 University of Göttingen, Albrecht von Haller Institute of Plant Sciences, Department of Vegetation and Plant Diversity Analysis, Untere Karspüle 2, D-37073, Göttingen, Germany, e-mail: erwin.bergmeier@bio.uni-goettingen.de 3 Society for the Protection of Prespa, Agios Germanos, GR-53077, Greece, e-mail: fansakell@gmail.com 4 Ministry of Environment & Energy, Mesogeion Avenue 119, GR-11526 Athens, Greece, e-mail: ykazoglou@gmail.com 5 Department of Forestry and M.N.E., TEI of Thessaly, Karditsa, GR-43100, Greece, e-mail: mvrahnak@teilar.gr 6 Forest Research Institute, Vasilika, GR-57006, Greece, e-mail: gfotiad@fri.gr Received: January 21, 2017 ▷ Accepted: July 14, 2017 Abstract. The vascular flora of the Prespa National Park (Greece) has been critically revised. C. 610 species recorded after Pavlides (1985) are listed. Some previously published records were found to be incorrect or dubious and should be deleted. As a result, 1769 species are now recorded for this area in the north-western corner of Greece, compared with 1249 in the publication by Pavlides. New or excluded taxa are listed alphabetically with locality and collection data, sometimes also with comments on taxonomy, distribution, etc. Key words: flora, Greece, Mount Devas, Mount Triklario, Mount Varnous, Prespa, vascular plants. Introduction The Prespa National Park (PNP) in the north-west- ern corner of Greece covers an area of 257 km 2 and extends altitudinally from 850 m (the level of the two lakes) to 2334 m on Mt Varnous (also known as Var- nountas, Kalo Nero, Bela Voda or Peristeri). The area is characterized by great geological diversity with gneiss and granite on Mt Varnous and limestone on the hills and lower mountains around the lakes. On the Greek side, the lakes are surrounded by extensive reedbeds and flat farmland used mainly for bean cul- tivation. The Prespa area is renowned for its high bi- ological diversity and is particularly famous as a fine bird locality. For general information on the area, see, e.g., Crivelli & Catsadorakis (1997), Catsadorakis (1999) and Standring & al. (2009). In 1974 most of Greek Prespa was declared a Nation- al Park, including the Greek parts of the Prespa Lakes and the slopes of the mountains Varnous and Triklar- io that overlook them. The Society for the Protection of Prespa (SPP), an NGO established in 1991, works on nature conservation and natural history projects in the area. Following a meeting in 2 February 2000 of the Prime Ministers of Greece, the Former Yugoslav Re- public of Macedonia (FYROM) and Albania, the pro- tected areas of the three countries around the Prespa Lakes now form the Transboundary Prespa Park. The Greek part of the Prespa Park comprises two sites of the European Union ‘Natura 2000’ network of protected areas, ‘Prespa National Park’ (GR 1340001) and ‘Var- noundas Mountain’ (GR 1340003). The present paper refers to the entire Greek Prespa National Park (PNP), encompassing both Natura 2000 sites, which fall under