Memoranda 2013

Including articles: Hans Silfverberg, A survey of Rotatoria from Finland; Henry Pihlström, The cormorants of Lake Ladoga in the early 20th century. Arctic invaders or continental colonists? Tom Hoogesteger, Joel Rahkonen & Ari Karhilahti, Pool frog (Pelophylax lessonae) CAMERANO 1882 (Anura, Ranidae), an addition to the Finnish amphibian fauna; Henry Väre, Johan Ernst Adhemar Wirzén ‒ the last demonstrator in botany at Alexander University; Juhani Räsänen, Six new Taraxacum (sect. Taraxacum) species (Asteraceae) from Finland and Sweden; Ilona V. Blinova & Pertti Uotila, Schoenus ferrugineus (Cyperaceae) in Murmansk Region (Russia); Pertti Uotila, Finnish botanists on the Kola Peninsula (Russia) up to 1918; Tea von Bonsdorff, New national and regional biological records for Finland 3. Contributions to agaricoid and ascomycetoid taxa of fungi 2; Panu Kunttu & al., New national and regional biological records for Finland 4. Additions to the knowledge of Finnish aphyllophoroid funga (Basidiomycota); Alexander N. Sennikov & Georgy A. Lazkov, Taxonomic corrections and new records in vascular plants of Kyrgyzstan, 2; Juhani Räsänen, A review of Taraxacum (Asteraceae) in eastern Finland (Ladoga Karelia and North Karelia).