Abstract
Euastrum insulare var.basichondrum, morphologically taking an intermediate position in respect ofCosmarium trilobulatum var.basichondrum andEuastrum bipapillatum, appeared to exhibit such a wide range of variation that it may be considered identical to the other two above-mentioned taxa. This taxon, after having been studied with both light- and scanning electron microscopy, is re-diagnosed. This alga occurs in wet moss cushions in weakly acid to neutral environments. The relation between such a terraqueous habitat and the principally arctic-alpine distribution and a conceivably associated process of speciation is discussed.
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Coesel, P.F.M. Notes on the variation, geographical distribution and ecology ofEuastrum insulare var.basichondrum (Chlorophyta,Desmidiaceae). Pl Syst Evol 144, 137–147 (1984). https://doi.org/10.1007/BF00986671
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DOI: https://doi.org/10.1007/BF00986671