Quantitative and qualitative characters were collected from 11 natural populations of four taxa: G. prochazkianum, G. simile, G. simplex and G. bicolor. In this paper the results of one-way ANOVA of 11 quantitative characters using taxon identity as the single predictor, and results of PCA are published. Seven qualitative characters were evaluated out of a morphometric analysis.

The results show a mostly intermediary position of G. simile between G. prochazkianum and G. simplex, whereby G. simile is classified here as a intermediate type at subspecies level (likely to be of hybrid origin between the assumed parents G. prochazkianum and G. simplex, which grow close to each other). G. simplex, which did not have a valid name, is classified as a subspecies of G. prochazkianum for its morphological and geographical proximity, as well as its genome size, and is described here.

For the identification of the taxa also flow cytometry was used, which demonstrated diploid ploidy level and a high similarity of genome sizes of all the taxa. Notes on the morphological differences between G. bicolor Schütz nom. inval. and G. prochazkianum subsp. simplex are added.