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LICHEN scalaris.
Olive and Black Imbricated Lichen,
CRYPTOGAMIA Alger.
Gen. Char. Male, scattered warts.
Female, smooth shields or tubercles, in which the
seeds are Imbedded.
Spec, Char. Crust imbricated, often scattered; its
lobes kidney-shaped, ascending, distinct, pale olive;
powdery at the edge and back. Shields flat, irregular,
black, with a black border.
Syn. Lichen scalaris. Ach. Prod. 95.
L. leucophaeus. Dicks. Crypt, fasc. 2, 20. With.
V• 4. 28. Hull. 292.
Lecidea scalaris. Ach. Meth. 78.
GATHERED by Mr, James Turner on the inside of old
hollow trees near Halesworth, Suffolk. We have received the
same from Eton, by favour of Mr. Gotobed. The fructifica-,
tion, which is excessively rare, was first observed on Lord
Rous’s park pales at Henham, Suffolk, by Mr. D. Turner,
whose specimens, compared with those of Dr. Acharius aqd
Mr. Dickson, haye ascertained the synonyms as above.
Mr. Dickson’s leucophceus is the very same plant as the scalaris,
not a variety; but neither the leucophceus of FI. Dun.
t. 955. f , 2, nor the plant of Diljenius, t. 82. ƒ . 2, is now
considered as belonging to it.
The crust is composed of small prominent scaly lobes, often
almost separate at their base, of a rounded or kidney-shaped
form, a little concave; their inner substance milk white, their
ppper surface pale olive, smooth, the back and margin while
and powdery. Shields sessile, scattered, of a roundish irregular
form, with a flat black opaque disk, and when young a
narrow border of the same colour.