| Carex hartmanii Caj., a sedge new for the Netherlands and closely allied to C. buxbaumii Wahlenb., is ecologically compared to the latter. Whereas the habitat of C. buxbaumii presents a geographical gradient from a Central European eutrophic environment of swamps and wet meadows (Magnocaricion and Cnidio-Juncetum juncetosum subnodulosi) up to, in Sweden, a nearly ombrotrophic vegetation of a raised bog, Carex hartmanii does not show such a gradient. It is known from a slightly more dry and acid habitat (compared to C. buxbaumii) in Central Europe (Cnidio-Juncetum juncetosum acutiflori) up to damp rivulet meadows rich in nutrients in S.-Sweden (Calthion). Both species are, however, contrasting in such a way, that in Central Europe C. hartmanii is more... |
