128 THE ESSEX NATURALIST.
Boletus candicans Fr.—considered by modern authors to be a variety of
if not identical with albidus (Roques) Quel. As the nomen-
clature is doubtful, candicans is left in the list. It is not
unlikely that B. pachypus in Syst. Myc. may be this species,
but pachypus is not clearly defined and is assumed to be
the same as B. calopus.
„ elegans Fr. 1836 = flavus (With.) Fr. 1835.
„ laricinus Berk. = viscidus (Linn.) Fr.
,, rubinus W. G. Sm. was placed by Worthington G. Smith in the
sub-tomentosus group, but all the species of this series
have big fusiform spores. Those of rubinus are oval about
6 x 41/2 and probably would be more correctly placed next to
sulphureus. There is little doubt that it is a distinct species
though unrecorded outside Britain.
„ rugosus Fr. = leucophaeus (Pers.) Gilbert. This is the common
Boletus under birch which is usually determined as scaber.
The latter, however, is uncommon and grows under various
deciduous trees. Scaber is distinguished by the glabrous
pileus made up of round cells whereas leucophaeus has a
minutely tomentose pileus, formed by long interlacing
hyphae. The base is often green. Fries in error adopted
Boletus rugosus from Sowerby who under this name illustrated
Polyporus aligatus.
Polyporus umbellatus Fr.—This rare species is retained in the list, but it
is a doubtful record. Plowright identified a specimen sent
from the Haslemere Museum in 1897 and mentions that it
had been recorded for Epping Forest.
nidulans Fr. = rutilans (Pers.) Fr.
Fomes.—It will be noticed that the genera in brackets include two that are
also given under Polyporus. The main distinction between
Fomes and Polyporus is whether the tubes are in strata or
not, i.e., whether there are or can be several seasons growth
on the same fruit body. Most specialists of this group do
not consider this a fundamental distinction, so the division
into genera is conceived on other lines which cut right across
the older views.
Fomes fomentarius (Linn.) Fr.—The old records for this species were
Ganoderma applanatum. The true fomentarius does not occur
in the South (in litt., E. M. Wakefield).
,, roseus (A. & S.) Fr.—From Loughton ; the only British record ;
probably on imported coniferous wood (in litt., E. M. W.).
Radulum fagineum Fr.=i?. quercinum Fr.
Acia Karst.—replaced by Mycoacia Donk, the first name having been
previously used for another genus.
Thelephora laciniata (Pers.) Fr. = terrestris Fr.