It's dominated by reindeer moss.
A week or two ago I went to Oulu, which is up north (for somebody from Helsinki) or down south (for somebody from Lapland).
Before landing I looked down at the landscape, puzzled: what are those whitish patches in between the forest green? Chalk? Naah ...
Up close the answer is obvious: it's reindeer moss. As I'm from the south, this light grey vegetation under the trees looks really really weird.
Some forest floors were green with various berries, others were grey with the reindeer moss (Cladonia sp., a lichen). Some of the grey ones went on for kilometers at a time, others were smaller patches of grey in a sea of green. They all looked weird, though.