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 description was published in "Nuytsia". The specific epithet ("nivalis") is a Latin word meaning "snowy" or "of snow" referring to the bright white flowers of this species. The exotic spider orchid occurs between Cape Naturaliste and Moses Rock in the Jarrah Forest and Warren biogeographic regions where it grows in peppermint woodland, coastal heath and in granite crevices. "Caladenia nivalis" is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife. 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