b
LICHEN hyperellus.
Convex Pin-headed Lichen,
CRYPTOGAMIA Alga,
G en. Char. Male, scattered warts.
Female, smooth shields or tubercles, in which the
seeds are imbedded.
Spec. Char, Crust rugged, granulated, tessellated,
yellowish green. Tubercles on black stalks, blacl^,
with a very convex powdery disk.
Syn. Lichen hyperellus. Ach. Prod. 85.
Calicium hyperellum. Ach. Meth. 93,
T h i s I first found on an old oak at Earsham, Norfolk, in
1783, but took it for L. splicerocepkalus, t. 414. It however
proves, by original specimens from Dr. Acharius, to be his
hyperellus. We have received fine specimens found near
Bury by Mr. Turner, and are obliged to him for calling our
attention to the above name.
The crust is conspicuous for its bright yellowish green hue,
and is very rugged, cracked and granulated, hy no means leprous
or mealy. Tubercles copious, black all over, on black
stalks scarcely a line high, whose base is said by Acharius to
be somewhat thickened in general; but this we.Scarcely perceive.
The disk of each -tubercle is very remarkably convex,
or hemisphserical, rough or powdery in appearance, being besprinkled
with innumerable seeds, found by Mr. J. D. Sowerby
to be combined in pairs, and each about the SOOOth part of
an inch in diameter. The border of the whole tubercle is
smooth, and in due time reflexed.
Janj.ifof.fiihU shS hy JaA SowerbytLonian'.