Carl Linnaeus, The Lapland Journey, translated by Peter Graves (Edinburgh: Lockharton Press, 1995), p. 80.
Lycksele Lappmark, 05/06/1732, ¶371:
It is very harmful to the reindeer if autumn snow falls, melts and then re-freezes so that the reindeer moss gets frozen. They get their winter feeding almost exclusively from ‘Coralloides montium’ [Reindeer Moss] and, if they cannot get it, they die since they do not eat hay. The Lapps chop down trees so that the reindeer can eat ‘Usnea arborea’ [beard moss] but this is not particularly suited to their stomachs.14 I was amazed at how the reindeer are able to reach their food through the deep snow that falls here.