Anomomorpha

Anomomorpha is a genus of lichens in the family Graphidaceae. The genus, described in 1891, has a pantropical distribution. These lichens form pale grey to dull olive crusts on tree bark that often develop low wart-like bumps covered with powdery particles, and produce narrow, usually wavy slit-like fruiting bodies. They are found in tropical rainforests worldwide, growing on shaded to semi-exposed bark in primary or lightly disturbed evergreen forests, with some species being narrowly restricted to specific mountain cloud forests....read more on Wikipedia.