Fragm. Flor. Geobot. 45(1–2): 431–443, 2000 Cardamine dentata (Brassicaceae) in Poland JAN J. WÓJCICKI AND KAROL MARHOLD WÓJCICKI, J. J. AND MARHOLD, K. 2000. Cardamine dentata (Brassicaceae) in Poland. Frag- menta Floristica et Geobotanica 45(1–2): 431–443. Kraków. ISSN 0015–931x. ABSTRACT: The results of taxonomic studies of Cardamine dentata Schult. from Poland are presented and the distribution map of the species in Poland based on a revision of herbarium material is provided for the first time. The problem of hybridization of C. dentata is briefly dis- cussed. KEY WORDS: Brassicaceae, Cardamine dentata, taxonomy, distribution map, hybridization, Poland J. J. Wójcicki, Department of Vascular Plant Systematics, W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, PL–31–512 Kraków, Poland; e-mail: wojcicki@ib-pan.krakow.pl; K. Marhold, Department of Vascular Plant Systematics, Institute of Botany, Slovak Academy of Sciences, Dúbravská cesta 14, SK–842 23 Bratislava, Slovakia; Department of Botany, Charles University, Benátská 2, CZ–128 01 Praha 2, Czech Republic; e-mail: marhold@savba.sk INTRODUCTION The genus Cardamine L. contains about 200 species, including approximately 17 species often treated as a separate genus Dentaria L. but not forming a monophyletic group (Al- Shehbaz 1988; Franzke et al. 1998; Sweeney & Price 2000). The genus is cosmopolitan, with representatives on all continents except Antarctica. In Poland the genus Cardamine is represented by 12 species, including those previously classified in the genus Dentaria. Cardamine dentata Schult. for a long time has been treated as one of the subspecific taxa of the broadly conceived species C. pratensis L., including both editions of Flora of Poland (Kulczyn ´ski 1927; Sychowa 1985). However, the C. pratensis group is a rather complicated polyploid complex; it includes taxa on diploid to dodecaploid (or even higher) levels (including high polyploid C. dentata) which are better to treat as separate species (Marhold 1994a and literature; Wójcicki 1995). The results presented here are based on a critical revision of herbarium material housed at the following herbaria: BIL, GDMA, GE, GLM, KRA, KRAM, KTU, LBL, LOD, LW, OLS, POZ, TRN, UGDA, WA, WRSL (abbreviations according to Holmgren et al. 1990 and Mirek et al. 1997). The distribution of C. dentata in Poland is presented in the ATPOL grid square system (Zaja˛c 1978).