pdf 25 MB - BSBI Archive

NEAV BRITISH LICHENS. 107
specimens were with difRcuIty obtained. Its systematic place is near
L. dispnnsa, Nyl., from which it is well distinguished by the above
characteristics.
6. L. aphanoides, Nyl. ; thallus obscurely olive-grey, thin, sub-
verrucose or subgranulose, unequal, indeterminate or subevanescent ;
apothecia black, small, couvex, immarginate, naked, white within ;
spores 8 in thecse, colourless, elliptical, simple, 0"009-0-013 mm. long,
OOO^.o-O'OOoD mm. thick; paraphyses not discrete; thalaniium
bluish, hypothecium colourless, or vaguely reddish below ; hymeneal
gelatine blue, and then violet-reddish with iodine.
On calcareous rocks of Craig Guie, near Crathie Church, in Braemar.
August, 1868. Apparently rare, and gathered only very sparingly
beside the limestone quarry. It is allied to L. apliana, Xyl., a species
found in Ireland by Mr. Carroll, both belonging to the group of L.
farvdla, Nyl.
7. L. meluphcuM, Nyl.; thallus black, thin, opaque, unequal, some-
what diifractate ; apothecia black, small, convex, immarginate, obscure
within; spores 8 in thecse, colourless, oblong, simple, 0"011-19 mm.
long, 0004-5-00055 mm. thick; paraphyses not discrete, epithecium
with the upper portion of thalamium blue, hypothecium slightly
brownish below ; hymeneal gelatine blue with iodine, and then partly
of a violet colour.
On granite boulders of Craig Guie, in Braemar. August, 1868.
Like the preceding, to which it is closely allied, this species occurred
but in very small quantity amongst the boulders which lie thickly
scattered on the lower slope of the hill. In both the specimens
gathered, it was associated with Lecanora fuscata, var. Sinopica.
8. L. imereua, Nyl. ; thallus obscurely cinereous, rimoso-areolate,
the hypothallus black, visible or denudate ;
black within ;
apothecia somewhat tumid,
paraphyses not discrete, epiihecium bluish-brown, hypo-
thecium with white opaque stratum beneath; spores ellipsoid-oblong,
0'014-17 mm. long, 0'006-8 mm. thick ;
hymeneal gelatine blue with
iodine.
On calcareous rocks of Craig Guie, in Braemar. August, 1868.
This species, which belongs to the group of L. tenebrosa, Flot., occurs
also on Morrone, according to specimens in my herbarium gathered
there in 1861, but not correctly named.
In addition to these, I may here notice the two following sub-
species, only one of which, however, is a new one :
—