60 On the Lichen-Flora of Epping Forest, ,
R. pollinaria, Ach. — On trunks near Waltham Abbey,
Sterile (Hb. E. F.). Near Copthall Lodge. Sterile (J. M. G.).
Tribe—Usneei.
Usnea hirta, L. — On rails at Walthamstow. Sterile (Hb.
E. F.). This species is now extinct in the Forest.
U. ceratina, var. scabrosa, f. ferruginascens, Cromb.—Hain-
ault Forest, near Hoghill Pond. Sterile (Hb. E. F.). Now
also extinct.
Tribe—Alectoriei.
Alectoria jubata, L. — ". On some boards on the edge Of
Hoghill Pond, Hainault Forest," vide E. Forster's MS. notes.'
There is, however, no specimen in Hb. E. F., nor have I seen
any trace of it in the Forest.
Tribe—Cetrariei.
Cetraria aculeata, f. hispida, Lightf.—At Lord's Pond and
Hoghill, Hainault Forest. Sterile (Hb. E. F.). On heaths near
the British Camp and the "Wake Arms." Sterile (J. M. C).
Platysma glaucum, L. — Near High Beach. Sterile (Hb.
E. F.). No trace of this species is now to be seen in the
Forest, and it is evidently extinct.
Tribe—Parmeliei .
Evernia prunastri, L. — On trees at Walthamstow and in
the Forest. Sparingly fertile (Hb. E. F.). At High Beach
and in various other parts (J. M. C), but sterile and usually
in a stunted condition.
Parmelia saxatilis, L. — On trunks of trees here and
there throughout the Forest. Sterile (J. M. C). Seen only
sparingly, and poorly developed.
P. sulcata, Tayl. — In a lane between Theydon Gate and
Theydon Church; sterile. Also on an oak near the King's
Oak, High Beach; fertile. Near Hoghill Pond, Hainault
Forest; sterile (Hb. E. F.). I have not observed this species.
P. borreri, Turn. — On apple-trees in Hoe Street, Wal-
thamstow. Sterile (Hb. E. F.). Near Chingford and at High
Beach. Sterile (J. M. C.).
P. caperata, L. — Near Hoghill, in Hainault Forest;