LECANORA] LECANORACER 269 
S. Lancashire, to DL. chlarona var. lecideina Oliv. Syst. Lich. i. 
p. 274 (1897), on account of its disappearing margin. 
Hab. On smooth bark of trees, occasionally on palings.—Distr. 
Fairly common throughout the British Isles —B. M. Withiel, Corn- 
wall; near Torquay, Devon; near Ryde, I. of Wight; Eridge Park, 
Henfield, Withyam, near Lewes, and Glynde, Sussex; Holmwood 
and Shiere, Surrey; Wrotham, Kent; Epping Forest, Gosfield Hall 
and White Colne, Essex; Hawkridge, Somerset; near Cirencester, 
Gloucestershire ; Ampthill, Bedfordshire ; Babraham, Cambridgeshire ; 
Gopsall Park and Twycross, Leicestershire ; Aberdovey, Merioneth ; 
Wrekin Hill, Shropshire; Cliffrigg and near Ayton, Cleveland, York- 
shire; Teesdale, Durham; Wastdale, Cumberland; near Glasgow; 
Appin, Argyll; Finlarig, Killin, Perthshire; Glen Cluny, Braemar 
and Countesswells Wood, Aberdeenshire; Loch Linnhe, Inverness- 
shire; Upper Lake, Killarney, Kerry; Mallaranny, Dugort and 
Glandarry, Achill, Mayo. 
Form geographica Hue in Bull. Soc. Bot. Fr. 1. p. 81 (1903). 
—Thallus similar to that of var. chlarona, but limited and 
dissected by black lines. Apothecia small, the margin at first 
prominent, entire, then crenulate.—L. subfusca var. geographica 
Massal. Ric. Lich. p. 6 (1852). L. chlarona var. geographica Nyl. 
ex Cromb, in Grevillea xviii. p. 68 (1890). L. rugosa subsp. 
chlarona var. geographica Cromb. Monogr. i. p. 414 (1896). 
Exsicc. Johns. n. 260; Mudd n. 113 pro parte. 
Evidently only an accidental form of growth which occurs also 
in other Lecanore. As noted by several observers, the black 
‘‘ seographical’”’ lines are constantly, if not always, due to an 
accompanying growth of Lecidea parasema, though they are occasion- 
ally present without any apparent Leczdea thallus. In some specimens 
of var. chlarona a dark margin is developed, but it seems to be 
composed of brown hyphomycetous hyphe. 
Hab. On somewhat smooth bark of trees.—Distr. Not common 
throughout the British Isles —B. M. Ullacombe, near Bovey Tracey, 
Devon; New Forest, Hants; St. Leonard’s Forest, Sussex; near 
Gravesend, Kent; Bathampton and Hawkridge, Somerset; Desford, 
Leicestershire; Malvern, Worcestershire ; Clitirigg, Cleveland, York- 
shire; New Galloway, Kirkcudbrightshire; Airds, Appin, Argyll; 
Finlarig, Killin, Perthshire. 
Var. pinastre Scher. Enum. p. 74 (1850).—Thallus effuse 
or subdeterminate, generally thin and _ subleprose, sometimes 
rather thicker and finely warted-areolate, greyish-white. Apothe- 
cia small, plane or convex, scattered or crowded, the dise reddish- 
or dark-brown, the thalline margin rather prominent, at first 
entire, becoming slightly crenulate ; paraphyses as in the species ; 
spores broadly ellipsoid, 9-15 » long, generally 7-9 jw thick.— 
Mudd Man. p. 146. L. rugosa subsp. chlarona f£. pinastre Cromb. 
Monogr. i. p. 413 (1894). 
Differing from the species in the more developed margin of the 
apothecia and in the generally smaller spores. From var. chlarona it 
is separated by the almost constantly entire apothecial margin. 
