and the causes affecting its recent diminution. 59
Fertile (Hb. E. F.). Near the British Camp [Loughton?].
Fertile (J. M. C).
C. coccifera, L.—On Epping Forest. Sterile (Hb. E. P.).
On heaths near the Wake Arms, sparingly and sterile (J.M.C.).
C. macilenta, var. scolecina, Ach. — On Salisbury Hall
Pound, Chapel End, Walthamstow. Substerile (Hb. E. P.).
I have not met with this variety.
Var. scabrosa, Mudd. — On old mossy trunks of trees, near
the roots, at Monk's Wood, High Beach, and Fairmead
Woods. Sparingly fertile (J. M. C).
Var. polydactyla, Flk. — On Epping Forest, between the
Reindeer and King's Oak. Fertile (Hb. E. P.). On decayed
stumps in Fairmead Woods, and near High Beach. Plentiful,
but sparingly fertile (J. M. C).
Var. ostreata, Nyl. — On trunks of old trees near High
Beach. Sparingly fertile (J. M. C.).
C. floerkiana, f. trachypoda, Nyl. — On heaths near the
Wake Arms. Fertile, but sparingly (J. M. C).
Cladina sylvatica, Hoffm. — On Epping Forest. Sterile
(Hb. E. F.). I have nowhere seen the type, which seems to
me to be now extinct, but only the following form.
P. tenuis, Flk.—On the ground near High Beach. Sterile
(J. M. C).
Tribe—Ramalinei.
Ramalina calicaris, Hoffm.—On trunks of trees near Epping
Station, at Copthall and Theydon Bois. Sparingly and but
rarely fertile (J. M. C).
B. farinacea, L. — On trees near Loughton. Sterile (Hb.
E. F.). High Beach and Great Monk's Wood. Sterile
(J. M. C). Young states occur also in various parts of the
Forest.
R. fraxinea, L. — On poplars in the Forest. Fertile (Hb.
E. F.). Near Epping, High Beach, and Copthall Lodge.
Fertile (J. M. C).
B. fastigiata, Pers. — On trees in Hainault Forest and
Theydon Mount. Fertile (Hb. E. F.). High Beach, near
Royal Oak. Fertile (J. M. C). Also sterile and stunted in
various other parts.