Coenogonium stramineum

Coenogonium stramineum is a species of corticolous (bark-dwelling) crustose lichen in the family Coenogoniaceae. Originally described as Dimerella straminea in 2004, it was transferred to the genus Coenogonium in 2006. The lichen forms a wafer-thin, grey-white to grey-green crust on tree bark, distinguished by its tiny yellowish apothecia (reproductive discs) that give the species its epithet, which means "straw-coloured" in Latin. It is known only from its type locality on Silhouette Island in the Seychelles, where it grows as an epiphyte in the island's lower-montane evergreen forest....read more on Wikipedia.