This relatively common taxon is very variable and we can describe several forms:
Ramalina siliquosa Chem. crassa forme des rochers côtiers:
The ends of the branches are very divided in a mainly bifid way in "serpent's tongue" but also multiple "in deer horn" these divisions sometimes having their ends a little curved into a hook. On acidic coastal rocks, very exposed to sea spray and seawater projections.
The branches are flattened, especially at their ends, very divided which gives them a palmed deer horn appearance, their surface is little or not nodular. On the vertical walls in the shade of exposed coastal rocks.