THE LICHENS OF PERTHSHIRE 15 
Chomophyte formation, on the small stones with which this class 
of ground is usually strewn. 
The second Association is the Closed Rhacomitrium Heath— 
really the final stage of the preceding—in which Khacomitriwm 
lanuginosum is the dominant plant. We may unite with this the 
third Association, or the Moss-Lichen Moor. This is practically 
which may be added:—Cladonia digitata, Biatorina cumulata, 
B. contristans, B. ligniaria, Bilimbia subviridescens var. trisepta, 
Buellia disciformis var. insignis, and perhaps Der matocarpon 
cartilagine 
The fourth or Anthelia Association, occurring in hollows 
where snow lies, or where the soil is kept wet and cold by water 
draining from melting drifts; and the fifth or Marsupella Associ- 
ation, of exposed mountain shoulders with a northern aspect, 
have not yet, as regards their lichen cobutitasats, been carefully 
be lis 
e of demarcation between them. The species are:—Cetraria 
id Peltigera venosa, P. polydactyla, Solorina crocea, Pan- 
nularia lepidiota, Lecanora tartarea var. frigida, Pertusaria 
glomerata, Cladonia bellidiflora, C. cervicornis, C. gracilis, C. 
furcata, Cladi Aas ial. i}, peste Guiiuta foveolaris, Lecidea 
decipiens, L. granulosa, L. demissa, L. vernalis 
Berengeriana, Ble sabulosa var. montana, B. quali ida, Cori- 
scium viride, Dermatocarpon cinereum, Polyblas tra Sendinerz, 
gelatinosa, P. neues prihanyreNie bryospila, and A. collet 
in wadaiien to a number of Lecidex occurring on rock “dé ris 
derived from the next formation 
The Chomophyte formation of Crags and Corries is, perhaps, 
the most interesting, as it is the most alpine, of the series. Its 
rich phanerogamic and bryophytic flora has attracted most 
British botanists sooner or later to Perthshire. The lichens are 
not less rare and local. 
more sian rocks and schists a the following at 
similar high altitudes :—Huopsis hemalea, Pyrenopsis hematopus, 
. homeopsis, P. furfuracea, Collema pari, 29 . glebulen- 
tum, Homodium rhyparodes, i Ha epehe lites Collemopsis 
00 mela 
Apiailia divine ar superiuscula, A. leucophyma, A. cinereo- 
ifescens, A. pelo elobotr a, A. frustulosa, ihiged oes: 
seat fuscorubens, L. deparcula, L. pheenterodes, L. contiqua, 
L. cinerascens, L. plana, Buellia succedens, iM aii Rhizoca 
re breada 
i omen Po iyblastia intercedens, P. theleodes, P. scotinospora, 
P. Henscheliana, Stawrothele umbrina. 
