36 FUNGUS FORAY ON 17TH OCTOBER 1914.
and are marked on one side by a paler area where dehiscence will take
place; the lime granules throughout are pure white.
Craterium minutum (Leers) Fries. A few old sporangia were obtained;
also a cake of the orange-red sclerotium, on dead leaves whose surface
was marked with a dark network of tracks left by the creeping plasmodium.
Didymium squamulosum (Alb. and Schw.) Fries. Freshly formed spor-
angia were found on stalks protected by a thick growth of rushes.
Comatricha nigra (Pers.) Schroeter. Tufts of old weathered sporangia
on a stick lying among grass.
C. typhoides (Bull.) Rost. A large growth in good condition on a
decaying beech log.
Lycogala epidendrum (L.) Fries. A few weathered bases of aethalia
only were seen.
Trichia varia Pers. Fine developments of both young and mature
sporangia were found on a prostrate beech trunk.
T. persimilis Karsten. Weathered and freshly formed sporangia were
obtained on dead leaves and wood.
T. botrytis Pers. A large growth, a foot or more in length, was found
on the lower side of a log; the sporangia were all old and weathered.
Arcyria denudata (L.) Sheldon. Sporangia in perfect condition occurred
on a decaying birch log associated with Trichia vatia and Comatricha
typhoides.
A. incarnata Pers. Weathered bases of sporangia only were seen on
dead wood.
A. cinerea (Bull.) Pers. Two white immature sporangia found on
fallen beech wood among grass were brought home and matured in the
course of twenty-four hours. The capillitium is irregularly formed and
consists largely of short free threads.
A. nutans (Bull.) Grev. Several gatherings were made of more or less
weathered sporangia.
A. pomiformis (Leers) Rost. A number of the scattered buff sporangia
were found on a fragment of fallen beech wood lying among deep grass.
Mr. J. Ross tells me that he has obtained this species on such protected
pieces of beech wood all through the late dry summer, together with
Stemonitis fusca, Comatricha nigra, C. typhoides, Trichia decipiens, Arcyria
incarnata, A. nutans and A. cinerea
Mr. Ross conducted some of our party to the trees, about six in number,
near Chingford, on which he had succeeded in finding Colloderma oculatum
(Lippert) G. Lister all through last winter from October to February and
on into April. It occurred on oak and hornbeam, either associated with
lichens and liverworts, or on bark green with algal growth, and usually
where the trickle of water from the crown of an old pollard had kept the
bark moist for months together. No trace of this species was seen on our
present foray.
Since the Cryptogamic Foray of last year Colloderma has been found in
other parts of the Forest, viz. in Hainault district by Mr. Ross, in Lords
Bushes by Mr. Wm. Howard in November 1913, and in Gilbert Slade by
Mr. W. H. Ryde in December 1913.