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• Recent Hungarian distribution of Potamogeton coloratus

  77–83

  Attila Mesterházy

  Róbert Vidéki

  Balázs András Lukács

  András Mészáros

  Attila Molnár V.

  Views:

  634

  The distribution of fen pondweed (Potamogeton coloratus) restricted to Europe where it is one of the rarest and most threatened pondweed species. In Hungary, former data of fen pondweed originated mostly from thermal and karstic springs. Due to intensive bauxite mining activity in the edge of the Transdanubian Mountain Range (NW Hungary) these springs dried up by the end of the 20^th century, and it caused the temporal extinction of the species. After the ceasing of mining activity many of the former karstic springs have regenerated and several fen pondweed populations have re-established. In this paper we summarized 18 population data of fen pondweed collected between 1999 and 2016. Many of them were formerly registered in the 19^th century too. Most of the new and re-discovered populations were found in karstic springs or in artificial and natural lakes in the vicinity of these springs.

• Discovery of Poa remota in the Bakony Mts – A new occurrence on the southern margin of the species’ area

  58–64

  Norbert Bauer

  Views:

  428

  Poa remota, previously known in Hungary only from the northern part of the Hungarian Middle Range, was found in the Bakony Mountains, the southern part of the mountain range. The species was recorded at three localities in the central part of the „Öreg-Bakony” geographic unit, in the valley system of the „Fekete-séd” stream. Similar to other Central European observations, the species thrives in spring marsh habitats and alder swamp forests around the springs. Poa remota may be a relict species of a colder climate period in the Bakony Mts. Its occurrence is also important from a phytogeographical point of view, as this record slightly expands the local distribution limit southwards.