Floristic relationship between plant communities of corresponding habitats in southeast Greenland and alpine Scandinavia

Barkman's similarity coefficiënts have been calculated for twelve ecologically related communities of southeast Greenland (SEG) and alpine Scandinavia (SCA). Comparisons were made between corresponding saxicolous lichen communities, dwarf shrub communities, snow bed communities and herb and Salix shrub communities. The corresponding SEG and SCA communities of extreme habitats have the same faithful taxa or the same dominant taxa, relatively few or no area-differential (ArD) taxa and they are floristically strongly related. They should be classified in one single association; the geographical variation is expressed in terms of geographical races. Corresponding vegetation types of mesic habitats have low floristic similarity coefficiënts, many ArD taxa and the same dominant taxa, or different faithful taxa. The geographical variation should be expressed here on the association level.