flora of chukotka: dactylina arctica (butterfinger lichen or arctic finger lichen) growing in brushy tundra

butterfinger parmeliaceae environment background dactylina botanical yellowish chukotka beringia national greenish northern arctica growing russian closeup habitat lichens natural outdoor texture lichen arctic finger brushy tundra detail floral fungus growth nature summer yellow flora close fungi green grows mossy north plant park east gray grey leaf moss pale view wild top