Salix reticulata (L.) - net-leaved willow. It is a prostrate, creeping dwarf shrub, up to 8 cm high with small broadly-elliptical leaves 1.5 - 5 cm long with conspicuous network of veins. Salix reticulata grows in cooler and arctic regions of Europe, North America and Asia. Samples were collected in the years 2007 - 2012 from southern Spitsbergen from the vicinity of the Polish Polar Station in Hornsund. The images of microscopic slides show cross-sections, both above ground (wooden branches) and underground (roots) parts.