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
Caladenia nivalis Caladenia nivalis Caladenia nivalis, commonly known as the exotic spider orchid or crystalline spider orchid, is a species of orchid endemic to the south-west of Western Australia. This orchid is easily distinguished by its bright white to pale pink and red flowers and its narrow range in and near the Leeuwin-Naturaliste National Park. "Caladenia nivalis" is a terrestrial, perennial, deciduous, herb with an underground tuber and a single erect, hairy leaf, long and wide. Up to three bright white, sometimes pale pink flowers long and wide are borne on a stalk tall. The sepals have thick, brown, club-like glandular tips.