26 Rey. 'T. Salwey on the Cryptogamic Flora of Guernsey. 
There are two varieties (unless indeed they are distinet spe- 
cies) of this plant in Guernsey. In the one the thallus exhibits 
the same loose mode of growth that it does with us in England 
and Wales, but has no sorediz ; but in the other it adheres so 
closely either to the rock or tree on which it grows that it is very 
difficult to detach the specimen. The surface too of this latter 
var. ?, and not the edges, is copiously sprinkled with sorediz. 
In the description given of the erosa in the ‘ Suppl. to E. B. it 
is observed, “ that sometimes the edges are raised, and producing 
mealy granules on the under side, assume, although not hollow, 
an appearance approaching to that common in P. tenella.” The 
sorediz however of the Guernsey var. of this plant are on the 
upper surface of the thallus. The hue of the thallus too, which 
is of a very pale whitish green, and its being more frequently 
found investing the dark crevices of rocks than growing on trees, 
seems to point out a difference of species. The shields also of 
the former variety are decidedly black, whilst those of the latter, 
though very minute in my specimens, are of a brown colour. 
The former variety I have not found in fruit m Guernsey. 
Parmelia obscura. Parmelia crassa. 
a. cycloselis, coarctata. 
B. ulothrix. saxicola, 
plumbea. elegans. 
lanuginosa, murorum. 
brunnea. 8. miniata, 
pezizoides, Suppl. to E. B. 
There is a very beautiful variety of this plant forming ex- 
tremely thin extensive patches on the rocks of a bright orange 
colour. The thallus is almost wholly minutely granular, and 
without apothecia. To the naked eye it looks only like an orange 
stain upon the rock. 
Parmelia fulgens. Downs near the 
leaden hue towards the edges, 
sea on the N. of the island, Miss 
when dry. Apothecia hemisphe- 
Lukis. rical, dark brown, with a raised 
Parmelia circinata. somewhat crenulate border of a 
cervina. lighter hue than the thallus. On 
8. squamulosa. the rocks at Dixcart Bay, Sark. 
tartarea. Parmelia hematomma, 
carneo-lutea. On an elin- 
tree in the village above 
Saint’s Bay. 
subfusca. 
atra. 
cinerea. 
badia; f. milvina. Jer- 
bourg. 
sophodes. 
—— ? exigua? 
Crust cartilaginous, of a dark green 
colour, having somewhat of a 
varia, and 
5. polytropa. 
vitellina. 
ferruginea. 
sordida ; a. glaucoma. 
B. sulphurea. 
impolita; Arthonia_prui- 
nosa, dch, 
scruposa, 
Gyalecta cupularis ; Lichen marmo- 
reus, Z. B. 
Cladonia endivizefolia. 
