Arabis recta Vill. (Brassicaceae) in Poland : distribution, habitats and threat assessment

Arabis recta is one of the rarest species in Poland. It has been reported from 15 sites, mostly in the Nida Basin (Małopolska Upland). The plant is a component of xerothermic grasslands but it can also grow in arable fields and fallows. In Poland, Arabis recta is considered to be threatened by natural succession and herbicide use. However, according to recent studies, it should be treated as an endangered species (EN category) in the country

New localities of Viola stagnina in Poland

Viola stagnina Kit. is a species regarded as a river corridor plant because of its confinement to river valleys in Central Europe. It is a component of alluvial meadows with natural flooding regime (Cnidion dubii alliance). V. stagnina is rare and red-listed in some European countries. Seven new localities of V. stagnina, its distribution map in Poland and information about possible methods of protecting the species are presented

New localities of Rosa gallica (Rosaceae) in Southern Poland

The paper presents new records for rare and endangered species - Rosa gallica L. from southern Poland. At each of the new stations french rose occupies secondary, anthropogenic habitats. Distribution map and habitat preferences of the studied species are provided

Chromosome data : a useful tool in taxonomy of Symphyotrichum ciliatum

We used chromosome data to verify the taxonomic affiliation of specimens previously recognized as Brachyactis ciliata. All analyzed plants were diploids based on x = 7 (2n = 2x = 14), the basic number characteristic for Symphyotrichum ciliatum, allowing the examined species to be shifted from the genus Brachyactis to the genus Symphyotrichum sect. Conyzopsis. The chromosome number (2n = 2x = 14) for specimens of S. ciliatum from Poland is reported for the first time

A new record of Typha shuttleworthii (Typhaceae) in Poland

The paper presents a new locality of Typha shuttleworthii W.D.J. Koch & Sond. in Poland. The species was found in wet roadside ditch in Kryg village near Gorlice (ATPOL grid square EG09). The distribution map of the species in Poland is provided

Dwarf shrub vegetation of rock ledges and clefts in the Pamir Alai Mountains (Middle Asia: Tajikistan)

The paper presents the results of phytosociological researches on rocky slope vegetation in Tajikistan with the aim to establish a comprehensive syntaxonomical classifi cation system. Field studies were conducted in 2010–2014 in Pamir Alai ranges and Pamirian plateau. Nearly 500 relevés documenting rock and scree vegetation were made according to the Braun-Blanquet method. Numerical analyses of selected 58 relevés representing dwarf shrub vegetation on rock ledges made it possible to distinguish: Ephedro glaucae- Spiraeion baldschuanicae and Ephedrion regeliano-fedtschenkoi alliances, as well as Spiraeetum baldschuanicae, Rhamnetum coriaceae, Pentaphylloidetum parvifoliae and Pentaphylloidetum dryadanthoidis associations, community of Ephedra glauca and community of Rhamnus minuta. The classification of vegetation of dwarf shrubs on rock walls occurring in the Pamir Alai Mts is proposed. Because of the species composition, physiognomy and microhabitat conditions, the plant communities were included into Artemisio santolinifoliae- Berberidetea sibiricae class Ermakov et al. 2006. The main factors determining the species composition of the classifi ed associations seem to be the elevation above sea level.The newly described syntaxa are largely defined by species restricted to very narrow ranges in Middle Asi