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Azolla filiculoides has been an ephemeral plant in Poland since the end of the 20th century. In the last 15 years this species appeared in 5 locations in south-west Poland. Habitat and plants of two populations became destroyed, three other still exist. A. filiculoides occurs in eutrophic or even polluted water where it forms dense mats, up to 10 cm thick. It stays sterile and propagates only in a...
The paper presents phytosociological records of the mire nature reserve Torfowisko Kunickie near Legnica, SW Poland, which are compared with previous data. The clear effects of eutrophication of the mire surroundings connected with an increasing drying out (because of existed drainage ditch system and low rainfalls during last years) cause that associations of oligo-/dys- and mesotrophic habitats...
Five species of the Festuca ovina group have been identified on open serpentine rocks and in xerothermic grasslands occurring in the Sudety Foreland: F. pallens Host, F. trachyphylla (Hack.) Krajina, F. ovina L., F. valesiaca Schleich. ex Gaudin, and F. guestphalica Boenn. ex Rchb. The most popular and the widest distributed species is F. trachyphylla. Less common but also wide distributed is F. ovina...
A new localityof Isolepis setacea has been found on a terrace of the Łacha river near Nieszowice village. It occurs there on bottoms and banks of new ponds, dug in 1998. The population consists of a few thousand of individuals.
Carex humilis is one of the rarest vascular plants in Lower Silesia. It has been observed only on 5 locations: 1 in the lowland and 4 in Sudety Foreland. 2 of them have historical value only. Existing populations are small and isolated, moreover, shaded plants hardly produce seeds. The species is critically endangered.
Botrychium matricariifolium (Retz) A. Braun ex W. D. J. Koch has been noticed on 34 localities in Lower Silesia. It is one of the most endangered elements of the flora of Lower Silesia now – only 3 sites of the species have been observed during 30 years.
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