gray, green, black, lichen on rock, symbiotic combination of a fungus with an algae or bacterium, close up, macro in fall on the y

abstract algae and background bacteria bacterium biology black botanical botany canyon close combination contours copy crust detail ecosystem environment fall feed flora forest fork formicinae front fungi fungus gray green grey growth herbology lichen macro micro moss mountains natural old oquirrh organism parietina pattern reproduce research rock rose science slow space stone study symbiotic texture trails usa utah wallpaper wasatch xanthoria yellow