Lloyd Mycological Writings V4.pdf - MykoWeb

SECTION 6.
Merismus. This section includes species that have several pilei proceeding from
the branching of a common stem or root-stalk. This is the same sense in which it
is used in the polyporoids. In the sense of Persoon as originally applied as a genus
of Thelephoroids, viz.: the encrusting species, it is a different idea.
STEREUM PALLIDUM (Fig. 551). Pilei imbricate, multi-
plex, formed of various confluent lobes, irregular. Color rugose,
faintly zoned when fresh. The upper surface striate fibrillose with
long fibrils. Hymenium smooth, uneven. Cystidia, none. It grows
in the earth, from a thick rooting system. Some collections are moie
simple and infundibuliform, and might be sought in Section 2.
Fig. 550
Stereum pallidum.
Fig 551
Stereum petalodes.
This seems to be a rather frequent species in Euiope, and has
been badly confused. Persoon named it and figured it, and authentic
specimens are still in his herbarium. He described it, unfortunately,
as having setulose hymenium, which his specimens do not bear out
nor are there any similar species known in Europe with that character.
Fries compiled it in his Systema and confused it with Sowerby's
figure of pannosum, hence in early exsiccatae it is usually called Thelephora
pannosa (viz.: Desm. 412 & 797, Rabenhorst, 1805). When he
first met it, Berkeley referred it to Stereum elegans, a tropical species.
Afterwards he seems to have confused it with Sower byi, and finally
named it as a new species, Thelephora multizonata. A recent Vienna
exsiccatae (318) has the species correctly referred to Persoon's name,
which is the only correctly-named specimen I have seen at London.
The Germans, however, have made good recent collections, and have
mostly correctly referred it at Berlin. Quelet referred the plant to
Thelephora intybacea and then discovered that Thelephora intybacea
(in the sense of Fries, at least) was a "new species," Thelephora
atrocitrina.
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