close up of pretty grey and yellow lichens growing on a branch with soft bokeh background

abstract algae autumn background blurred botany branch brown close closeup colour colourful cover cyanobacteria day detail ecology ecosystem environment flora foliose forest fungi fungus garden green grey greygreen grow growing hood hypogymnia ichens lichen lichens living macro monks moss nature organism outdoor parietina park physodes plant scale season side symbiosis symbiotic texture tree twig winter wood xanthoria yellow