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268 OLA V GJ.lEREVOLLMost greas that emerge from the snow consisteither of bare rock or of enormous boulder fields.But soil is not entirely absent. From earth containingsome fine material, solifluction forms a networkof polygons with stones and coarse material attheir periphery and fine material in the interior.The vascular plants, when present, are concentratedto those parts of the polygons where fine soilprevails but soil movements are moderate. DwarfSalix (herbacea or polaris) are confined to the lowerparts of this belt, and also most of the Saxifragaspp. See further KILANDER. The number of vascularspecies gradually decreases upward, and above1800 m only a few vascular plants are found inNorthern Sweden. Luzula arcuata (incl. L. confusa),Lycopodium selago, Oardamine bellidifolia, Poaflexuosa, etc. have scattered occurrences at highaltitude. The record is held by Ranunculus glacialiswhich ascends to 2055 m on Mt. Kebnekaise. Evenat the highest elevations, bryophytes and lichensoccur in considerable numbers. They either areepilithic or grow in cushions on the bare soil orbetween boulders.Acta Phytogeogr. Suec. 50