LIST OF SPECIES RECORDED FROM ESSEX. 43
of the cup ; the turbinate shape of the sporangia, the orange-
red colour of the mass of spores, the large size (8μ) and rough-
ness of the spores are all characteristic of C. rufa.
Dictydium cancellatum (Batsch) Macbr.—Not common;
occurring in abundance on a stump in Wanstead Park for two
years in succession ; also found by Mr. Ross near Chingford ;
var. fuscum Lister was also found in Wanstead Park on the
same stump as the typical purplish-red form. This species
usually, appears in summer and early autumn.
Tubifera ferruginosa Gmel.—Occurring in summer and
autumn on dead wood. Rare in this district; I know of one
gathering only, which was made by Mr. T. Petch, in Wanstead
Park, in October, 1904.
Dictydiaethalium plumbeum (Schum.) Rost.—Not uncommon
on logs and wood-piles, from late summer to winter.
Enteridium olivaceum Ehrenb.—Occurring on logs in autumn
and winter, not common ; the aethalia are far less conspicuous
when mature and olive-brown than they are in the immature
rosy stage.
Reticularia Lycoperdon Bull.—Abundant on dead wood
from May to September.
Liceopsis lobata (Lister) Torrend.—This species was described
from specimens found within a big hollow stump of Spanish
chestnut in Wanstead Park in July 1887-8. It has since been
recorded from Surrey, Bedfordshire, Shropshire, Cheshire and
Flintshire, and in Europe from the Jura mountains and the
Pyrenees.
Lycogala epidendrum (L.) Fries.—Very abundant on dead
wood from summer to early autumn, rarely appearing in the
winter months.
Trichia affinis De Bary.—Abundant on dead wood and occur-
ring throughout the year in favourable seasons, but most
frequent in autumn, winter and spring.
T. persimilis Karsten.—Even more abundant than the
preceding, and occurring in similar situations and in the same
seasons.
T. scabra Rost.—Not unfrequent on old stumps, appearing
from July to December ; it can be distinguished in the field
by the rich orange colour of the spores and elaters.
T. varia Pers.—Very abundant on dead wood from autumn
to spring, and often forming large developments.