Nowe stanowiska roślin naczyniowych Polski, 2

Streszczenie W pracy przedstawiono nowe stanowiska 12 rzadkich (lub regionalnie rzadkich) roślin naczyniowych w Polsce, tj. Cochlearia danica , Colchicum autumnale , Cuscuta campestris , Lythrum hyssopifolia , Ostericum palustre , Pedicularis sylvatica , Plantago coronopus , Ranunculus arvensis , Rosa gallica , Sesleria uliginosa , Succisella inflexa oraz Veronica prostrata .

Distribution and habitat properties of Carex pulicaris and Pedicularis sylvatica at their range margin in NW Poland

This paper presents the distribution dynamics, soil and phytocoenotical conditions of the occurrence of <em>Carex pulicaris</em> and <em>Pedicularis sylvatica</em> at the margin of their range in NW Poland. Dynamic cartograms of these species were made on the basis of our field studies and available contemporary and historical records. The studies showed that the plants grow on organic hemic-muck soils, mucky soils and typical muckous soils. The occurrence of these two species on different types of soils proves that they are able to adapt easily to varying habitat conditions of post-bog areas. Populations of <em>C. pulicaris</em> and <em>P. sylvatica</em> were most frequently not numerous and occurred in small community patches. Analyzed phytocoenoses with <em>C. pulicaris</em> have been classified as the community of the alliance <em>Caricion davallianae</em> or the alliance <em>Molinion</em>. Phytocoenoses with <em>P. sylvatica</em> are represented by the association <em>Nardo-Juncetum squarrosi</em> and the community of the class <em>Molinio-Arrhenatheretea</em>. The distribution dynamics of these species shows that they are disappearing from some parts of this region, which proves the recessive trends. This process is more intensive for <em>P. sylvatica</em>, which should be included in the red list of Polish plants like <em>C. pulicaris</em>. The disappearance of the populations of both species has been caused by worsening habitat conditions (insufficient moisture, eutrophication), expansion of competitive plant species and land abandonment.

A new Contribution on the Vascular Flora of Romania

As a result of our field floristic studies in the recent years (2012 and 2013), we recorded some new data on the occurrence and chorology of three vascular plant species in Romania. Two of these are alien plants, invasive in many geographic regions of the world, namely: Acroptilon repens (an Asian species, reported as a newcomer in the flora of Romania, in this paper), and Picris echioides (a Mediterranean species, which is reported now in new localities). The third species, Pedicularis sylvatica, is a quite rare indigenous plant, critically threatened in Romania, reported here for the first time in the flora of Moldavia (eastern Romania).