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Najas gracillima (A. Braun ex Engelmann) Magnus in Hungary
43-49Views:74Najas gracillima, an introduced species to Europe, naturally occurs in East-Asia and NorthAmerica. It was firstly discovered in Hungary in 2012 in our weed survey of rice fields in the vicinity of Szarvas, Gyomaendrőd and Mezőtúr. Although, it occurred in relatively high abundances in the rice fields along the Körös river its invasion is not expected into new habitats in the near future due to its special habitat preference and gregariousness.
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Lajos Felföldy: a prominent Hungarian botanist and hydrobiologist
3–25Views:160Lajos Felföldy (1920–2016) was one of the most versatile and open-minded Hungarian biologists. He began his scientific career as a student of Prof. Rezső Soó. Between 1938 and 1946 he participated in geobotanical studies in University of Debrecen and Kolozsvár (Cluj-Napoca, Romania). He contributed with important achievements to the development of several biological disciplines. His pioneering study on the effects of air pollution on epiphytic lichens (1942) was among the firsts in the world. He described Hemitherophyte life-form as a discrete unit within Raunkiaer's plant life-form system (1942). He was a pioneer in the cytological (caryological) study of wild vascular plant species in Hungary (1947–1949). His results regarding to primary production of freshwater algae and algal culture (1958–1960) were in leading edge. In 1972 he founded and until 1990 edited the Hungarian series entitled ‘Vízűgyi Hidrobiológia’. Books of this series aimed to publish identification keys of freshwater taxa. These books were proved to be decisive and useful tools for Hungarian hydrobiologists in biological classification of brooks, streams, rivers and different types of stagnant waters. Between 1934 and 2009 he collected more than ten thousand herbarium sheets. After his retirement, he dealt with the revision of the herbarium material of Department of Botany in Hungarian Natural History Museum and Botanical Garden of Eötvös University (Budapest). He participated in the preparation of the New Hungarian Herbal. His scientific work was characterised by deep humility for nature, which was founded on strong theoretical and practical background.