Porto Santo island

I had the nice opportunity to join a group of lichenologist in this small island situated in the Madeira archipelago. The aim of this expediction was to estimate population size of the endemical lichens Anzia centrifuga and many Ramalina spp.

colorful crustose lichens

Usnea subscabrosa Motyka

The genus Usnea is rare in the Porto Santo island. This population of Usnea subscabrosa presents thamnolic acid as main medular compound.

Lecanora sulphurella Hepp

the dominant yellow crustose lichen

Squamarina sp.

Roccella sp.

with possible Opegrapha growing inside.

Rocella sp.

Ramalina portosantana Krog

Ramalina nematodes (Nyl.) Krog & Øst

Ramalina and Roccella