Anthropogenic disturbance as a factor supporting the development of rare species as exemplified by Botrychium matricariifolium in the Silesia region of Poland : [poster]

Botrychium matricariifolium (Retz) A. Braun ex W.D. J. Koch (daisy-leaved moonwort; Ophioglossaceae), an endangered and strictly protected species ofmoonwort has lost significant number of its localitiesduring recent decades in Poland. From over 200 knownlocalities from the area of the entire country, only aboutthirty were confirmed in the period of last 30 years. Themajority of known populations usually consists of a fewindividuals or even a single individual plant. Little isknown about the life history of the species, and what ismore, until now no monitoring of the existing populations has taken place (Fragment tekstu)

Polystichum setiferum at the northeastern limit of its distribution range

During field studies in 2019 in the Beskid Śląski mountain range in southern Poland, one individual morphologically resembling Polystichum setiferum was found. Nuclear DNA content analysis confirmed the species identity. The new stand of P. setiferum corresponds to historical literature reports and herbarium specimens from the Czech Republic and Poland, and extends the northeastern limit of the distribution of this species. As the historical stands in both countries have not been confirmed, the newly discovered stand is at present strongly isolated, as the nearest extant locations of P. setiferum in Austria, southern Hungary, and western Romania are nearly 500 km away. Therefore, this unique stand deserves special attention and protection

Native Taxa of Ferns in the Municipal Botanical Garden in Zabrze

Na terenie Miejskiego Ogrodu Botanicznego w Zabrzu zgromadzono 33 taksony (w tym 27 gatunków) rodzimych paproci, należących do 9 rodzin. Większość tych paproci rośnie na dwóch pagórkach w południowo-centralnej części ogrodu, a pozostałe w stawach w południowo-zachodnim i południowo-wschodnim jego sektorze. Jest to pierwsze opracowanie opisujące kolekcję rodzimych taksonów paproci w polskim ogrodzie botanicznym.In the area of the Municipal Botanical Garden in Zabrze, 33 taxa (including 27 species) of native ferns, belonging to nine families, have been gathered. Most of these ferns grow on two mounds in the south-central part of the garden, and the rest in ponds in the south-west and south-east sectors of the garden. This is the first study describing the collection of native fern taxa in the Polish botanical garden.The research was self-financed by the authors

Equisetum ×meridionale (Milde) Chiov. : a new hybrid taxon in the flora of Poland

A new hybrid within the Hippochaete subgenus of Equisetum genus, Equisetum × meridionale (Milde) Chiov. was discovered in Poland during the research conducted in 2022 at two locations in Kotlina Żywiecka (the Żywiec Basin) and Beskid Wyspowy (Island Beskids – Western Beskids) in the anthropogenic habitats in close proximity to Equisetum ramosissimum . The identity of the hybrid was unequivocally confirmed by macro-morphological observations, microscopic analysis and flow cytometry. The most pronounced macroscopic characteristics of the hybrid were the intermediate size of the shoots and leaf sheaths, which are black with long black teeth. The microscopic observations revealed that the hybrid has silica tubercles in the form of cross-bands, similarly as in the case of E. ramosissimum , but not in the form of two rows as in the case of E. variegatum . The measurements of the nuclear DNA content (2C values) revealed that the putative hybrid had a nuclear DNA content intermediate to that of the parental species, i.e. E. ramosissimum (56.13 pg) and E. variegatum (63.80 pg) obtained in the present studies and within the values previously reported for E . × meridionale (60.7-61.2 pg)