Historical and current occurrence of halophytic species Carex divisa was studied in Slovakia during 2003–2014. It is known only in the Podunajská nížina Lowland, SW Slovakia, where 19 sites were found in total including historical and recent locations. Recently, the number of records decreased markedly and we confirmed only 9 localities. Due to the sharp reduction in the number of sites and appropriate habitats, Carex divisa is re-evaluated as endangered (EN) plant species of the Slovak flora.
Historical and current occurrence of obligate halophyte Artemisia santonicum subsp. patens was studied in Slovakia during 2001-2012. The species has been occurred in the Podunajska nižina Lowland and the Vychodoslovenska nižina Lowland; 35 localities were found in total. The data from the Zahorska nižina Lowland is erroneous. Recently the number of localities decreased markedly and the species was confirmed only in 17 sites. Most of them (16) is situated in the Podunajska nižina Lowland and a single one has been confirmed in the Vychodoslovenska nižina Lowland. Based on our data, Artemisia santonicum subsp. patens belongs to the endangered (EN A2ac+4c) plants of the Slovak flora according to IUCN categories and criteria, because 50 % of locations were destroyed and survival prognosis is unfavorable for the most recent populations.
Between 2011 and 2016 we surveyed 42 sites of coastal salt marshes of Croatia. We confirmed the occurrence of several rare and endangered plant species. Ten of them are included in the Red List of Croatia; critically endangered (CR) Eleocharis uniglumis, Triglochin barrelieri and T. maritima, endangered (EN) Carex divisa and C. extensa, vulnerable (VU) Parapholis incurva, Salsola soda and Suaeda maritima and category data deficient (DD) Limonium virgatum and Puccinellia festuciformis. We also report localities of other rare taxa of salt marshes like Allium telmatum, Tripolium pannonicum subsp. tripolium, Juncus gerardii, Parapholis filiformis, Plantago cornuti, Samolus valerandi and Scorzonera parviflora. Several plant species are endangered. Their habitats, salt marshes were converted into fields or destructed by construction for developing tourist infrastructure. Today only a part of the remained areas are under protection.
The distribution of spring ephemeral grass Sclerochloa dura in Slovakia was studied using herbarium specimens deposited at the public herbaria, and literature sources. The targeted field research was carried out. The species was recorded continually in the Pannonian parts of the country in lowlands, hills and in lower parts of adjacent mountains, where the number of sites decreased with a rising altitude. Sclerochloa dura is a characteristic species of the alliance Polygono-Coronopodion and prefers trampled sites and field roads. Distribution map of species was provided.
Two new and one historical site of Cyperus glomeratus were discovered in SW Slovakia along the left bank of the river Danube. After 60 years, this is the second record of the species in the country. We provide details about the historical and current distribution of C. glomeratus in Slovakia based on herbarium revision and field survey on the Slovak section of the river Danube. According to the phytosociological data collected from the new locality (Čenkov) and from the confirmed historic locality (Štúrovo), the stands with C. glomeratus were identified with less developed, ruderalized form of the association Cyperetum micheliani.