54
IV.
On the Lichen-Flora of Epping Forest, and the Causes
affecting its Recent Diminuation.
By the Rev. James M. Crombie, M.A., F.L.S., &c.
[Read April 28th, 1883.]
The first list of the Lichen-Flora of Epping Forest is that
given in Turner and Dillwyn's 'Botanist's Guide,' published
in 1805. In this the following fifteen species are enumerated,
viz.:—
Lichen pinicola.
,, sophodes.
,, tigillaris.
,, lynceus.
,, graniformis.
,, pezizoides.
,, sphaeroides.
„ inquinans.
Lichen tesselatus.
„ palmatus.
„ granulatus.
,, subtilis.
,, trapeziformis.
,, pulmonarius.
,, vermicularis.
All the above, with the exception of Lichen pinicola, Lichen
lynceus, and Lichen vermicularia, are recorded as having been
gathered by Edward Forster, jun., who, residing in the dis-
trict, collected at intervals for nearly half a century the
lichens of the Forest. The next list is that given by Mr.
Forster himself in his MS. notes interleaved in his copy of
the above work of Turner and Dillwyn—a transcript of which,
made by your President (Professor Boulger), I have had the
advantage of perusing. In this, exclusive of several species
from other parts of Essex, as also of some "Spilomas," there
are enumerated, in addition to the above, the following forty
species, which I have transcribed in the order in which they
occur in the MS.:—
Lichen farreus.
,, aipolius.
,, aryenus.
„ coarctatus.
Lichen turneri.
,, scolecinus.
,, scalaris.
,, polycarpus.