REPORT ON THE LICHENS OF EPPING FOREST. 103
L. parella, Ach.
On mortar of brick wall, Copt Hall Green ; fertile.
Sub-Tribe—PERTUSARIEL
Pertusaria leioplaca, Schaer.
On hornbeam trunk to west of Staples Hill ; on oak trunk
between Woodberrie Hill and Grubbs Pits ; fertile.
Sub-Tribe—THELOTREMEI.
Phlyctis argena, Koerb.
On hornbeam trunk, between Broadstrood and Debden
Green ; fertile.
Urceolaria scruposa, Ach. Meth.
On brick walls, Theydon Bois ; Uplands, Loughton ;
fertile.
Sub-Tribe—LECIDEEI. 
Lecidea ostreata, Schaer.
On oak trunks, usually towards the base, in and about
Loughton Camp ; Jacks Hill ; sterile.
L. lucida, Ach. Meth.
On north faces of brick walls, Theydon Bois, Loughton,
Highbeach, and elsewhere ; sterile.
L. quernea, Ach. Meth.
On decaying bark, Great Monk Wood ; near Loughton
Camp.
C. coarctata, Nyl.
On flint pebble, Blackweir Hill ; on brick coping, Debden
Slade ; fertile.
L. flexuosa, Nyl.
On decayed stump between Sandpit Plain and Little
Monk Wood ; on hornbeam trunk, Grubb's Pits ; fertile.
L. uliginosa, Ach. Meth.
On damp ground, Oak Hill, Theydon ; about Loughton
Camp ; Great Monk Wood ; near Robin Hood ; fertile.
L. fuliginea, Ach.
On rotting stumps, Loughton Camp ; between Sandpit
Plain and Little Monk Wood ; fertile.
L. parasema, Ach. Meth.
On hornbeam trunk, near Grubb's Pits ; fertile.
L. crustulata, Koerb.
On flint-pebbles, Little Monk Wood, Blackweir Hill;
fertile.