Galanthus earlier authors had mainly relied on was shown to be highly homoplasious. A number of species, such as "G. nivalis" and "G. elwesii" demonstrated intraspecific biogeographical clades, indicating problems with speciation and there may be a need for recircumscription. These clades were assigned names, partly according to Davis' previous groupings. In this model clade Platyphyllus is sister to the rest of the genus. By contrast another study performed at the same time, using both nuclear and chloroplast DNA but limited to the 14 species found in Turkey, largely confirmed Davis' series and subseries, and with biogeographical correlation. Series "Galanthus" in
Luzula nivalis wide range of mainly moist habitats and , including wet meadows, snow patches, seepages, along the margins of ponds, marshes, streams (and other water bodies) as well as tundra, slopes and ridges. Occasionally "L. nivalis" has been found on dry sites including gravel, sand, silt, clay, till. Luzula nivalis Luzula nivalis, commonly known as arctic wood-rush or less commonly as snowy wood-rush (both names are used with or without hyphenation), is a species of perennial rushes endemic to Canada, Greenland, Alaska, and Northern Europe in Scandinavia. It was described by Polunin (1940) as one of the most abundant, ubiquitous, and