198
THE ESSEX FIELD CLUB.
Monk Wood. Among the lichens, Mr. Paulson discovered Trachylia
stigonella growing parasitically upon the thallus of another lichen
(Pertusaria) on an oak trunk near the Wake Valley ponds ; and Mr. Percy
Thompson found Thelotrema lepadinum growing on a felled hornbeam
trunk by the Green Ride, near to Great Monk Wood.
At the Meeting at the Roserville Retreat, which followed tea, interesting
remarks on the results of the day's search were made by the referees, and
the thanks of those present was accorded to them.
Miss Hibbert-Ware contributes the following notes on the Myxomycetes
found during the day and on the occasion of the Club's Fungus Foray on
28th October :—
NOTES ON THE MYCETOZOA COLLECTED ON THE EPPING
FOREST FUNGUS AND CRYPTOGAMIC FORAYS IN 1910.
These Forays took place on 14th October and nth November re-
spectively and the ground worked was, in each case, that between Loughton
and High Beach.
On 14th October, it was found that the alternate wet and fine weather
of the preceding weeks had been extremely favourable to the development
of Mycetozoa. The list for the day included 22 species—a good record
when it is remembered that the students of this group were deprived,
on account of illness, of the guidance of their specialist leader, Miss G.
Lister, F.L.S.
The notable finds of the day were Craterium aureum (till quite recently
unrecorded for the Forest) and Fuligo muscorum. The latter species
had occurred near Theydon Bois in great abundance some years before.
This was its second record for Epping Forest, and it was found in masses,
both as apricot-coloured plasmodium, and also as grey ash-like aethalia
on the stalks of bracken fern.
On nth November, 16 species were collected. Perhaps the rarest
among them, was Physarum virescens var. obscurum. This was found
spreading in yellow plasmodium over dead leaves and developed into
sporangia on the homeward journey. It had only once before been
recorded for the Forest. Arcyria ferruginea was gathered in coral-pink
immature sporangia. The yellow plasmodium of Badhamia utricularis,
in fan-like masses, covered several feet of the surface of two tree-stumps.
The combined lists include 26 species of mycetozoa :—
Ceratiomyxa fruticulosa Macbr. 14th Oct.
Badhamia panicea Rost. 14th Oct.
Badhamia utricularis Berk. 11th Nov.
Physarum nutans Pers. Both dates.
Physarum virescens Bitm. var. obscurum Lister. 11th Nov.
Fuligo septica Gmelin. Both dates.
Fuligo muscorum Alb. and Schw. 14th Oct.
Craterium minutum Fries. Both dates.
Craterium aureum Rost. 14th Oct.
Colloderma oculatum G. Lister. Both dates.
Didymium squamulosum Fries. Both dates.
Didymium nigripes Fr. Both dates.
Comatricha nigra Schroeter. Both dates.