Bilberry forms typical undergrowth in European mesic boreal forest. Gutulia National Park, Norway
On the fertile soil of Karkali Strict Nature Reserve, Finland, undergrowth is composed of wood sorrel (Oxalis acetosella) and common hepatica (Hepatica nobilis)
Rich undergrowth in Prince Albert National Park, Canada, on thick glacial till sediment: Canadian dwarf cornel (Cornus canadensis, with berries), wild sarsaparilla (Aralia nudicaulis, with big leaves), twinflower (Linnaea borealis subsp. americana, small plants), starflower (Trientalis borealis, with some brown leaves)