Wolf lichen

The thallus, or vegetative body, has a fructicose shape — that is, shrubby and densely branched — and a bright yellow to yellow-green, or chartreuse color, although the color will fade in drier specimens. Its dimensions are typically 2 to 7 cm (0.79 to 2.76 in) in diameter.[2] The vegetative reproductive structures soredia and isidia are present on the surface of the thalli, often abundantly.-Wikipedia