Biodiv. Res. Conserv. 23: 29-41, 2011 BRC www.brc.amu.edu.pl DOI 10.2478/v10119-011-0014-x Two morphologically distinct groups of the Calypogeia fissa complex were found in Europe Katarzyna Buczkowska1*, Jakub Sawicki2, Monika SzczeciÒska2, Stanis≥aw RosadziÒski3, Mariola Rabska1 & Alina Bπczkiewicz1 1Department of Genetics, Adam Mickiewicz University, Umultowska 89, 61-614 PoznaÒ, Poland, e-mail: *
[email protected] 2Department of Botany and Nature Protection, Uniwersity of Warmia and Mazury in Olsztyn, Plac £Ûdzki 1, 10-728 Olsztyn, Poland 3Department of Plant Ecology and Environmental Protection, Adam Mickiewicz University, Umultowska 89, 61-614 PoznaÒ, Poland Abstract: Two genetically distinct groups (PS and PB) detected previously within the C. fissa complex in Europe were studied with respect to 47 morphometric characters. The two examined groups differed statistically significantly with respect to 34 morphological traits. The forward stepwise method of discriminant analysis showed that the set of diagnostic characters could be limited to nine. The best diagnostic features were morphological characters describing the shape of leaf: length and width of leaf, height of dorsal part and distance from the apex to the ventral base of the leaf, length of the 3rd coordinate of the leaf, and underleaf width as well as characters of the stem: length of internodes and size of internode cells. Plants of the PS group were smaller (shoot width range from 922-1780 µm) than plants of the PB group (1600-3900 µm). Based on genetically identified samples, classification functions for each group were computed and the derived functions were used for the classi- fication of samples from the herbarium collections.