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• Escaping of Euphorbia myrsinites from cultivation in Eger (E Hungary)

  253–256

  Peregrym Mykyta

  Views:

  170

  Euphorbia myrsinites L. (Euphorbiaceae) is a well-known ornamental plant with native dis­tribu­tion around the Mediterranean Basin, the Black Sea, the Caucasus region and Minor Asia. Its es­cape from cultivation and its naturalization in Western and Central Europe as well as in North America was reported in many cases. In Hungary, the casual escape of E. myrsinites has been documented more than fifty years ago and new observations were recently reported from different regions of the country. Here, I discuss a new record of the species from the town of Eger (E Hungary). The obtained data allow considering E. myrsinites as a locally naturalized species in the flora of Hungary. According to standard­ized criteria, the species may be able for local invasions too, but further observations are needed to accurately determine its present status in Hungary.

• Contributions to knowledge on the distribution of nine adventive or invasive algae species in Hungary

  11-21

  Enikő T-Krasznai

  Viktória B-Béres

  Zsuzsanna Kókai

  Krisztina Buczkó

  Csaba Balogh

  Péter Török

  Views:

  128

  Hungarian records of nine adventive or invasive algae [Didymosphenia geminata, Nitzschia closterium, Reimeria sinuata, Navicula schroeteri, Pleurosira laevis (Bacillariophyceae); Pediastrum simplex (Chlorophyceae), Cylindrospermopsis raciborskii, Cuspidothrix issatschenkoi, Sphaerospermopsis aphanizomenoides (Cyanobacteria)] are presented. Navicula schroeteri Meister is a new species for the Hungarian flora. Although the observed distribution patterns of these species were very different, the increasing frequency of their appearance indicates significant effect of climate change on abiotic environment of inland waters, such as the increase in water temperature, increase in salt concentration, and eutrophication. The significance of continuous biomonitoring is emphasized, which, through the recognition of natural and human-induced changes in species composition of algae, or the appearance and rapid expansion of non-indigenous species, can detect environmental changes of inland waters.

• New data to spreading of Plantago coronopus in Hungary

  99-101

  Dávid Schmidt

  Views:

  294

  In this study, new data of the naturalized roadside alien Plantago coronopus L. found in 2020 are listed. Numerous stands have been detected at sites far from previously known localities. These data show that P. coronopus is still in an intense phase of its spread. The species currently known from 90 flora mapping units in Hungary. Its new observations come from the narrow vegetation strip along roadsides, with the exception of the new data from Szombathely, which comes from the parking lot of a shopping center.

• Research on the distribution of woolly cup grass (Eriochloa villosa) in the northern part of Borsod-Abaúj-Zemplén county, Hungary

  27–32

  Viktor Virók

  Tünde Farkas

  Cecília Krajnyák

  Views:

  503

  Eriochloa villosa (Thunb.) Kunth was recorded for the first time in Hungary in 2007. Since then, the species spread intensively in the area and appeared at some other parts of Hungary. We car­ri­ed out a research at the current distribution range of the species in the northern part of Borsod-Abaúj-Zemplén county. We asked how big is the infested area surrounding the place of the first occurrence and whether other occurrences could be found in other parts of the investigated area. This article also gives a review on its known localities in Hungary and neighbouring areas. During the field research, 58 locations of the species were identified, it occurred mainly in ploughed and unploughed agricultural fi­elds, and at some places in disturbed grasslands, too. It has spread on a large scale around the ne­igh­bo­uring areas of the first location found in 2007. Other locations were also found even at more distant pla­ces such as in the valley of the Sajó and Bódva rivers and in the Cserehát region. This means that further spread of Eriochloa villosa can be expected, especially in areas with an intensive agricultural activity, in disturbed grasslands, and a threat of its appearance is also suspected in open natural habitats.

• Lactuca tatarica (Asteraceae), a new species for the Hungarian alien flora

  170-178

  Márton Korda

  Éva Kergyik

  Anna Tóth

  Ágnes Csiszár

  Views:

  150

  The first occurrence of blue lettuce (Lactuca tatarica (L.) C.A. Mey.) is reported from Hun­ga­ry. Information on its taxonomy, morphology, distribution, habitat preference and nature conservation aspects is presented. The European local spread of this Eurasian and North American species started at the end of the 1800s. The first localities were reported from the shores of the Baltic and North Sea. Its alien occurrences in inland European regions have been noticed since the 1920s. As L. tatarica have pre­viously been known from the neighbouring territories of Slovakia and Austria, its appearance in Hun­gary is not at all unexpected. However, the species was found (August 2018) in the southern part of Csongrád county, i.e. far away from the above-mentioned countries. Due to the species’ habitat preference (ruderal ground), ecological requirements and successful vegetative propagation, which correspond to foreign observations, its future spread is highly probable.

• Current distribution of the potentially invasive narrow-leaved ragwort (Senecio inaequidens DC.) in Hungary

  179-187

  Győző Haszonits

  Dávid Schmidt

  Views:

  285

  Our study presents the actual status of potentially invasive Senecio inaequidens in Hungary. Literary and herbarium data are also discussed. We report some new data from ruderal places and near highways which are unmarked until now. The actualized distributional map of the species are given. We sign the potential habitat threats too.