THE LICHENS OF PERTHSHIRE 9 
hirta) in open clearings or on the outskirts. A much greater 
variety occurs on trees in glades or wa like spaces than in the 
shade of dense wood-canopy. On trees in the former GuitHone 
R. farinacea, Evernia preeasiys Parmelia perlata, P. caperata, 
P. saxatilis, leat See eae P. physodes, Physcra 
pulverulenta, P. pepe P. aipol P. adglutinata, Lecanora 
varia and its subspecies, L. ites, L. tartarea, L. parella, Per- 
tusaria communis, P. amara, Biatorina cyrtella, B. graniformis, 
Buellia disciformis, B. myriocarpa, B. canescens, Lecidea para- 
sema, Opegrapha atra, O. varia, O. vulgata, Graphis elegans, 
midis, A. cinereopruinosa, and llax. In dense woods, as the 
e i , the s ey _grtdually oer: those which 
ultimately survive el arta a, Lecanora 
varia ff, 1nd freed, eas afien, pear a atra, 
On the 
as in hedgerows, fields, and parks, the fcllowing are conspicuous 
species :—Ramalina fraxinea, R. ca ee Parmelia sazxatilis, 
P. exasperata, Xanthoria parietina, P. fuliginosa var. letevirens, 
Pertusaria communis, P. amara, and aiade arly the various 
species o yscia, few or none of which occur in shady woods. 
oist, 
sheltered valleys protected from wind, such choice localities 
frequently being w Majsee open woodlands, under the shelter of 
mountains, debouch on the shores of lakes—as at the head of 
h Tay, and by ee Earn, Loch Katrine, and ee Sano. 
The lichens here form a very typical lacustrine plant ¢ ae 
characterized Py the snag: of the large folinceoug. Biicines 
associated with bark-loving Pannarii. 
those enumerated xbOe, the following occur in this 
Collema terrulentum, C. flaccidum, Synechoblastus fetes oe 
S. aggregatus, S. fasciculare, “aegis Burgessui, L. saturninum, 
Platysma glaucum, Ppa lina farinacea, Parmelia ciliata, P. 
cetrarioides, P. physod es (omen fruiting), Stictina Thourasii, 
S. fuliginosa, i lim bates arina scrobiculata, Lobaria ul- 
tan . partle, N. oid Signin N. subtomentellum, Peltigera 
patie ‘Physcia pale ‘pa, P. venusta, Pannularia triptophylia, 
annaria rubiginosa, Pp. rubig. var. c@ruleo-badia, Coccocarpia 
plumbea, Lecanora allophana, L. rugosa, L. chlarona, L. intu- 
mescens, Ly. lutescens, L. effusa, Pertusaria amara, P. communis, 
P. letoplaca, Thelotrema lepadina, Lecidea minor, L. parasema, 
Biatorina erysibordes, B.g a, B. premnea, Bacidia gare 
hon 
JOURNAL OF Sones Fes. 1915. eat se c 
