175 Dwa-nowe-stanowiska-Botrychium-lunaria-(L.) -SW. -w-Sudetach -Zachodnich 175 Reczyñska K., wierkosz K. 2013. Dwa nowe stanowiska Botrychium lunaria (L.) SW. w Sudetach Zachodnich. Acta Botanica Silesiaca 9: 175184. Dwa nowe stanowiska Botrychium lunaria (L.) SW. w Sudetach Zachodnich Two new localities of Botrychium lunaria (L.) SW. in the Western Sudetes KAMILA RECZYÑSKA 1 , KRZYSZTOF WIERKOSZ 2 K. Reczyñska, K. wierkosz, Muzeum Przyrodnicze Uniwersytetu Wroc³awskiego, ul. Sienkiewicza 21, 50335 Wroc³aw; e-mail: 1 kamila.reczynska@gmail.com, 2 krzysztof.swierkosz@life.pl ABSTRACT: Botrychium lunaria is considered as vulnerable to extinction (category V/VU) in Poland. The paper presents description of two newly discovered localities of the fern in the Western Sudetes. One locality was found in an abandoned quarry near Radomice (Izerskie Foothills), where Botrychium lunaria was a component of initial thermophilous grasslands of the Festuco-Brometea class. This population consists of 134 individuals. The second locality was discovered in the £omniczka Cirque (Karkonosze Mts). The fern was a component of hygrophilous tall-herb communities of the Adenostylion alliariae alliance. This population is very small containing only 3 individuals. Phytocoenoses from both localities are documented in 3 relevés. Both populations occur in habitats which were transformed due to human activity. This finding confirms that rare and endangered plant species can be maintained in some anthropogenic habitats. The locality in the abandoned quarry in Radomice is threatened with natural succession and should be regularly grazed, while population in the £omniczka Cirque seems not to be threatened with anthropopressure, however a dense cover of vegetation and small number of individuals can affect a Botrychium lunaria population. KEY WORDS: endangered ferns, common moonwort, Festuco-Brometea, Mulgedio- Aconitetea, Sudetes, South-western Poland Wstêp Podejrzon ksiê¿ycowy Botrychium lunaria (L.) Sw. jest najczêciej spotykanym przedstawicielem rodzaju Botrychium w ca³ej Polsce, jednak z uwagi na swoj¹ biologiê oraz wymagania siedliskowe uznawany jest za gatunek nara¿ony na wyginiêcie (kat. V/VU) zarówno w ca³ym kraju (Zarzycki, Szel¹g 2006), jak i na Dolnym l¹sku (K¹cki i in. 2003; Szczêniak 2008). Na Dolnym