1
On the outside the walls are overgrown with black lichen and grey moss.
2
The lowest branches, with their nests of black lichen, burst alight.
3
Marshall led a nice pitch up into this huge slanting dihedral of white rock streaked with black lichen: the Zebra.
4
The horses were tied to the trees and stood with heads lowered beneath gnarled boughs that seemed tangled with black lichen.
5
The strange black lichen enwreathing those branches now gathered round her, growing in answer to a muttering of power from her full, blood-tinted lips.