The occurrence of Glyceria striata (Lam.) Hitchc. in Europe and the new localities of the species in Poland

Glyceria striata (Lam.) Hitchc. is a North American species that has been recorded in most, semi-natural habitats in Europe, e.g. in meadows, bog springs, margins of water bodies. It is circumscribed within two taxa of lower rank: G. striata subsp. striata and G. striata subsp. stricta. Only G. striata subsp. stricta has been reported from Europe. This paper gives a list of the European locali- ties of the species (48) and describes two newly discovered localities in Poland (the Wyżyna Małopolska upland and the Western Carpathian Mts.). The distribution of G. striata in Europe is mapped and potential migration routes of the species are discussed

Polygonum polystachyum Wall. ex Meissner in Poland : status, distribution, habitats

The study sums up the data gathered to-date on the distribution in Poland of an interesting synanthropic species ñ Polygonum polystachyum. The distribution of this species in Poland was described and the numbers of existing populations were estimated. The habitats were described in detail and the status of the species in the Polish flora was discussed

A spread of Typha laxmannii (Typhaceae) in southern Poland

The paper is based on the floristic studies carried out in southern Poland by multi- author team and revision of herbarium material from the genus Typha. The paper presents 19 new localities of Typha laxmannii which spreads throughout Poland. Notes on habitats and a distribution map of the species in Poland are also given. Additionally, an original key to species of the genus Typha, occurring in Poland is included