Stock photography, photos: Lichen on twig Stock photos of Lichen on a twig amongst dead leaves and woodland floor litter Photograph: © Andrew Palmer Click for a larger image and more information Keywords associated with this stock photo: Lichen, plant, botany, wood, woodland, twig, tree, decay, parasite, host, fall, autumn, green, forest, aboriculture, horticulture, dead, fallen, wind, blown