[ 2386 ] b o
L I CHE N Sepincola.
Fence Lichen.
CRYPT0GAM1A Algce.
G e n . C h a r . Male, scattered warts.
Female, smooth shields or tubercles, in which the
seeds are imbedded.
S p e c , C h a r . Membranaceous, smooth, glaucous-
brown; paler and somewhat pitted beneath; segments
flattish, ascending, sinuated, crenate, powdery
at the edge. Shields nearly marginal, elevated,
flattish, chesnut-coloured, with a thin
notched border.
S y n . Lichen Sepincola. Ehrh. Phytoph. 90. AcJi.
Prodr. 169. Hedw. Crypt, v. 2 . 8 . t. 2 . Dicks.
Crypt, fa s c . 3. 18. W ith . v. 4. 73. Hull. 300.
Platisma Sepincola. Hoffm. PI. Lich. v. 1 . 71.
t. 14. ƒ . 1.
Cetraria Sepincola. Ach. M e th . 297.
ivX R . DICKSON mentions this as growing on stones upon
the Scottish mountains. We have seen no authentic British
specimens, except a few, without fructification, shown us by
Mr. Turner, growing on old posts and rails by the sea near
Yarmouth. One of these is exhibited at fig. 1. That in fructification,
Jig. 2, on a branch of birch, came from Germany*.
It is usually found on old wooden fences, aged thorns, or other
bushes, sometimes on stones, and is akin to L. glaucus, t. 1606,
but not so thin, dilated, nor polished, neither is it so glaucous,
but rather of a chesnut hue verging towards a lead-colour;
the under side is paler, and whitish, not black, in the central
p a rt; the edges crenate, jagged and powdery. Shields copious
when the plant attains its full growth, chiefly about th
margin; at first sessile and concave, but soon elevated, flattish,
of a shining chesnut hue, with an uneven thin border.
Fig, 3 was gathered in Scotland by Mr. W.Borrcr.