223 Acta Musei Moraviae, Scientiae biologicae (Brno) 95(1): 223–229, 2010 The moss Rhabdoweisia crenulata (Mitt.) H. Jameson in the Czech Republic and adjacent regions IVAN NOVOTNÝ & SVATAVA KUBEŠOVÁ Moravian Museum, Department of Botany, Hviezdoslavova 29a, CZ-62700 Brno, Czech Republic; e-mails: inovotny@mzm.cz, skubesova@mzm.cz NOVOTNÝ I. & KUBEŠOVÁ S. 2010: The moss Rhabdoweisia crenulata (Mitt.) H. Jameson in the Czech Republic and adjacent regions. Acta Musei Moraviae, Scientiae biologicae (Brno) 95(1): 223–229. – In the Czech Republic, the moss Rhabdoweisia crenulata was known until very recently from only Èeský les [the Bohemian Forest]. In 2009, it was newly recorded in the Zkamenìlý zámek Reserve (Žïárské vrchy Hills). We provide a detailed description of the new locality and review the distribution of the species in the Czech Republic and adjacent regions, with remarks on the fertility of herbarium specimens. Keywords. Zkamenìlý zámek Nature Reserve, Žïárské vrchy Hills, distribution, bryophyte Introduction Rhabdoweisia crenulata (Mitt.) H. Jameson was described from the eastern Himalayas (Sikkim) in 1859. Early European floras and keys did not distinguish between R. crenulata and R. crispata. It is a disjunctive Holarctic moss. In Europe, the main centre of its distribution lies in the British Isles (HILL et al. 1992) and it is also fairly common in the mountainous parts of the Black Forest in Germany. The distribution includes north- western Wales, north-western England, western Scotland and western Ireland, Belgium (Namur, Gravet), Spain, France (Pyrenees), Germany, Switzerland, western Norway, northern Italy (Piedmont and Lombardy), and Romania (southern Carpathians – Fagaras Mts.) (HEGEWALD 1972, SMITH 2003, EDERRA INDURAÍN 1983, HERBEN 1987, NOVOTNÝ 2002, MISERERE & BRUSA 2003, NISM 2004). Outside Europe, it occurs in the Himalayas (Sikkim), China and Taiwan, on Maui in the Hawaiian Islands (STAPLES et al. 2004), in Greenland, North America (North Carolina, southern Appalachian Mountains), the Dominican Republic, and north-western South America (Colombia) (LAWTON 1961, ZANDER 1966, CRUM & ANDERSON 1981, FRAHM et al. 2000). On the European continent the species was first recorded on the territory of what is now the Czech Republic, in Èeský Les (the Bohemian Forest; at Èertovo jezero). It was collected by VELENOVSKÝ (1897) as R. denticulata (Brid.) Bruch, Schimp. & W. Guembel (= R. crispata (Dicks.) Lindb.) (HERBEN 1987). HERBEN (1987) showed that this specimen actually represents R. crenulata. So it has been known from the Czech Republic since 1987, from the 1897 collection by J. Velenovský. Velenovský also collected R. crenulata in rock crevices above the glacial cirque known as Èerné jezero in 1901 (VELENOVSKÝ 1903, sub R. denticulata), and HERBEN (1987) confirmed this locality. SOLDÁN & VÁÒA (2002) considered the relative abundance of R. crenulata both at Èerné jezero and Èertovo jezero as “frequent”. ISSN 1211-8788