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Contributions to the flora of railway-side pioneer habitats on Tiszántúl region
86–101Views:601Verges have considerable importance to preserve diversity in arable landscape. The modernized railway embankments are a great surface to the spread of native pioneer or adventive (invasive) plant species. The new data are about the flora of railway embankments mainly from Tiszántúl region. I present some species found on railway verges (e.g. Equisetum ×moorei, Equisetum ramosissimum, Lycopsis arvensis, Euphorbia maculata, Lepidium densiflorum Tragus racemosus, Vulpia myuros). An especially important new data is the refinding of Galium humifusum in Hungary. Locally non-native and adventive species can use the blanketing materials (sand or gravel) of railway embankments as dispersal corridor and colonize them. The railwayside habitats could contribute to the conservation of rare native pioneer species.
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Data on alien vascular plant species in Hungary II. (7–12)
253–264Views:413In the second part of our series providing data on alien plant species in Hungary, we address taxa belonging to the families Cabombaceae, Brassicaceae, Rubiaceae, Buxaceae, Violaceae and Compositae. We present new records of the distribution of Cabomba caroliniana on the Körös Plain: along the Élővíz Canal between the towns of Békés and Békéscsaba the species was found at 17 sites, covering a total area of more than 630 m² in slightly alkaline, low-conductivity water that remains unfrozen in winter. In Szentendre, we document a transient escape of Isatis tinctoria and several populations of Rubia tinctorum, some of which can be traced back to former cultivation. We report the first extra-garden, woodland occurrence of Pachysandra terminalis in Hungary and relate it to the dumping of green waste. We clarify the status of Viola prionantha in the Hungarian flora and list numerous occurrences mainly associated with urban pavements, parks and cemeteries. We detected a new occurrence of the Atlantic halophyte Cochlearia danica on the Great Hungarian Plain, near Karcag, along the Main Road 4. Finally, we describe the first Hungarian record of Symphyotrichum squamatum from pioneer silt surfaces along a canal near Szeged, highlighting its potential invasive role.