Ramalina darwiniana

Ramalina darwiniana is a species of strap lichen in the family Ramalinaceae. Found only in the Galápagos Islands, it was first described in 2007 and named in honour of Charles Darwin's work on the archipelago's biodiversity. This shrub-like lichen grows up to 15 centimetres wide and is typically found on tree bark or wood in coastal and arid areas of the islands. It is characterised by its greenish-grey colour, grooved branches that often curl at the tips, and the occasional presence of small holes where branches fuse together. R. darwiniana reproduces through cup-shaped structures called apothecia and can be identified by its chemical reaction to potassium hydroxide solution (a standard chemical spot test), which turns its inner layer orange-yellow then red. The species is well-adapted to the harsh, dry conditions of its native habitat and is often abundant where it grows....read more on Wikipedia.