REPORT ON THE LICHENS OF EPPING FOREST. 
IOI 
Tribe— USNEEI. 
Usnea hirta, Hoffm. 
On sallow trunk, Blackweir Hill ; sterile. 
Tribe—CETRARIEI. 
Cetraria aculeata, Fr. 
form Jiispida . Cromb. 
Heathy ground, E. border of Great Monk Wood ; Black¬ 
weir Hill; Highbeach ; spermogoniferous. 
Platysma glaucum, Nyl. 
On projecting beech-roots, Great Monk Wood ; sterile. 
Tribe—PA RMELIEI. 
Parmelia perlata, Ach. Meth. 
On oak trunk, S. slope of Loughton Camp ; on beech 
roots, Great and Little Monk Woods; Epping Thicks; 
sterile, in poor condition. 
P. sulcata, Tayl. 
On stump, Great Monk Wood ; on oak trunk, Staples 
Hill; on projecting hornbeam root, W. of Wake Valley ; 
sterile. 
P. caperata, Ach. Meth. 
On tree-root, Epping Upland ; small and in poor con¬ 
dition ; sterile. 
P. fuliginosa, Nyl. 
var. laetevirens, Nyl. 
On hornbeam and crab trunks, S. of Loughton Camp ; 
sterile. 
Tribe—PELTIGEREI. 
Peltigera spuria, Leiglit. 
On heathy ground about the Wake Arms ; west of 
Loughton Camp ; fertile. 
Tribe—PHY SC IE I. 
Physcia lychnea, Nyl. 
At base of ash trunk, by the Roding at Buckhurst Hill ; 
ditto at Blackacre, Theydon Bois ; fertile. 
P. pulverulenta, Nyl. 
Sub. sp. pityrea, Nyl. 
On old tombstones, St. Nicholas Churchyard, Loughton ; 
fertile ; on beech trunk, Little Monk Wood, on tree 
