LICHEN stictoceros.
Dotted-horned Lichen.
CRYPT OGAM I A Algce.
G en . Ch a r . Male, scattered warts.
Female, smooth shields or tubercles, in which the
seeds are imbedded.
S pec. Ch a r . Shrubby, spreading, much branched,
compressed, wrinkled, pale sulphur-coloured ; solid
and spongy within. Tubercles terminal, solitary,
minute, convex, black.
wVV E know no synonym or account of this Lichen, which
was found by our worthy friend and patron James Brodie,
Esq-, growing on the ground upon broken sand-banks, in the
warren opposite Exmouth, Devonshire, not above 300 yards
from the ferry, early in the spring of 1803.
At first sight it might be taken for L . pnmastri, but nothing
can prove more distinct when the fructification, and indeed
the true nature of the fronds, are attended to. The latter grow
in spreading tufts or clusters, of a pale greenish sulphur-
colour, and are repeatedly branched, divaricated, compressed,
wrinkled and pitted, scattered here and there with white
powdery warts ; being alike on both sides, they are easily
distinguished from L. prunastri. The internal substance is
light and spongy, of the purest white, not tubular, nor are the
oxilloe perforated. The terminal branches are acuté and more
cylindrical, often dotted with little dark specks, and each
tipped with fructification in the form of minute black convex
solitary smooth tubercles, such as are proper to the tribe Cla-
donia in Acharius’s Prodromus, evincing the affinity of this
new species to L . uncialis and its allies.