LECANORA. | LEOANO-LECIDEEI. 413 
give it much the general aspect of states of L. angulosa. It is a rather 
variable plant, presenting the subspecies and varieties that follow. 
Hab. On the trunks of old trees, from maritime to upland tracts.— 
Distr, General but not common throughout Great Britain and Ireland ; 
not seen from the Channel Islands.—B. M.: New Forest, Hants; Ulla- 
combe, near Bovey Tracey, S. Devon; near Cirencester, Gloucestershire ; 
near Bakewell, Derbyshire; Hollybush Hill, Malvern, Worcestershire ; 
Wark-on-Tyne, Northumberland; Calder Abbey and Alston, Cumber- 
land; Levens Park, Westmoreland. Near Glasgow, Lanarkshire ; 
Pennycuick Glen, near Edinburgh; Barcaldine, Argyleshire; Blair- 
drummond, near Stirling; Killin, Perthshire; Cults, near Aberdeen. 
Rostellan, co. Cork; Old Dromore and Killarney, co. Kerry; Tervoe, near 
Limerick; Derryclare and Lough Inagh, co. Galway. 
Subsp. L. chlarona Nyl. Flora, 1883, p. 107.—Thallus thin, 
smoothish or subrugulose, whitish or greyish-white. Apothecia 
small or submoderate, plane or slightly convex, pale or pale-brownish, 
the thalline margin subentire or finely crenulate; spores 0,009— 
15 mm. long, 0,005-9 mm. thick.—Lecanora chlarona Cromb. Gre- 
villea, xviii. p. 68. ZL. subfusca forma chlarona Leight. Lich. Fl. 
p. 203, ed. 3, p. 188. LZ. albella form chlarona Cromb. Lich. Brit. 
p. 51. L. subfusca y. glabrata (non Ach.) Mudd, Man. p. 147.— 
Brit. Exs.: Leight. n. 115; Mudd, nos. 112, 113 pro parte ; Larb. 
Lich. Hb. nos. 256, 257. 
Distinguished from the type by the thinner, smoother thallus, and the 
non-rugose thalline margin of theapothecia. It so closely touches it, how- 
ever, in other respects that Nylander /. c. does not regard it as specifically 
distinct. This view is further confirmed by the occurrence of intermediate 
states with difficulty referable to either. It is always well fertile, the 
apothecia being numerous, otten crowded, and becoming darker in age. 
Hab. On the smooth bark of trees, occasionally on old pales, from 
maritime to upland situations. — Distr. General and abundant in 
England; apparently rarer in N. Wales, Scotland, and Ireland.—B. M.: 
Epping Forest, Essex; Shiere, Surrey; Wrotham, Kent; Glynde, 
Sussex; Lyndhurst, New Forest, Hants; Isham, Torquay, and near 
Bovey Tracey, S. Devon; Withiel, Cornwall; near Cirencester, Glou- 
cestershire ; Ampthill, Bedfordshire; Over and Babraham, Cambridge- 
shire ; Gopsall Park, Leicestershire ; Aberdovey, Merionethshire; Wrekin 
Hill, Shropshire ; near Ayton, Cleveland, Yorkshire ; Teesdale, Durham ;. 
Wastdale, Cumberland. Near Glasgow; Appin, Argyleshire; Finlarig, 
Killin, Perthshire; Countesswells Wood, near Aberdeen ; Loch Linnhe, 
Lochaber, Inverness-shire. Near Cork; Upper Lake, Killarney, co. 
Kerry. : 
Form pinastri Cromb. Grevillea, xviii. (1890) p. 68.--Thallus 
subeffuse, thin, subleprose, greyish-white. Apothecia small, plane 
or convex, brown, the thalline margin entire.—Lecanora subfusca 
e. pinastri Scher, Enum. (1850) p. 74; Mudd, Man. p. 146, 
Differs only in the less developed thallus and the entire thalline margin 
of the apothecia, At times, however, it is almost confluent with the 
type, so that-the differential characters given seem owing to the habitat. 
The apothecia are either scattered or somewhat crowded. 
