Z l K
S P I L O M A variolosum*
Pustulous Spiloma.
CRYPTOGAMIA Algce.
Gen. Char. Receptacles shapeless, without a border,
hairy and powdery, in an uninterrupted crust.
Spec. Char. Crust tartareous, rugged, greyish white,
cracked. Receptacles convex, rounded, very black j
their centres often deciduous. •
F o r this nondescript species we are obliged to Mr. Turner,
who finds it on old trees in many places, more especially at
Coltishall, Norfolk.
The crust is white, more or less clouded with grey, and
differs from the last in being of a much thicker and tartareous
texture, rugged and rough in the surface $ like that somewhat
cracked or tessellated, and of an indeterminate figure. Receptacles
numerous, convex, intensely black, of a rounded
but irregular shape, their middle part often breaking off unequally,
and exposing to view the white crust beneath, which
is elevated, forming a sort of core to the receptacle, as in
Lichen sanguinarius, t, 1 55, and many others,
20 77
u b it«//iU. bu if Ji7ojiterl-(j *Zondon.