306 LICHENACEL [PHYBCIA. 
numerous, and the spermogones, which are not uncommon, have the 
spermatia equally cylindrical, 0,006 mm. long, about 0,001 mm. thick. 
Hab. On the trunks and branches of trees, and on old pales, rarely 
erratic on stone walls, chiefly in cultivated lowland and upland districts. 
—Distr. General and common throughout Great Britain and probably 
Treland, becoming rare in N. Scotland; rare in the Channel Islands.— 
B. M.: Island of Guernsey. Bury St. Edmunds, Suffolk ; epi, Forest, 
Essex ; Edgeware, Middlesex; Hurstpierpoint and Lewes, Sussex ; near 
Ryde, Isle of Wight; Wembury, Devonshire ; near Withiel, Cornwall ; 
Bourn, Cambridgeshire; Milton, Oxfordshire; Bolton Abbey, Lincoln- 
shire; Twycross, Leicestershire; Moor Park, Herefordshire; Crowle, 
Worcestershire; near Shrewsbury, Shropshire ; Aberdovey and Anglesea, 
N. Wales; Ayton, Cleveland, Yorkshire; Middleton, Teesdale, Durham; 
Kendal, Westmoreland. Largs, Ayrshire; near Edinburgh; Appin, 
Argyleshire; Killin and Blair Athole, Perthshire; Cults, near Aberdeen, 
and Abergeldie Castle, Aberdeenshire ; Applecross House, Ross-shire ; 
Carrigaloe and Aghada, co. Cork; Ballynegarde, co. Limerick; Dun-. 
kerron, co. Kerry. 
Form 1. panniformis Cromb. Journ. Linn. Soc. Bot. xvii. (1880) 
p. 571; Journ. Bot. 1882, p. 273.—Thallus with the lacinie short, 
crowded, densely imbricate. Apothecia small.—Lichenoides glaueum 
orbiculare, segmentis latiusculis, scutellis nigris Dill. Muse. 177, t. 24. 
f. 71>. 
One of those panniform conditions of foliaceous lichens which have 
recently been noted, forming as it were a thickish congested crust, the 
laciniz presenting their normal appearance ‘only at the extreme circum- 
ference of the thallus in entire specimens. In the fertile plants seen, the 
apothecia are few and small, with the receptacular margin thickish. 
Hab, On the trunks of old trees in upland districts.—Dzst. Only in 
W. England and among the Central Grampians, Scotland. —B. M.: He 
boro’ Magna, Warwickshire. Craig Tulloch, Blair Athole, Perthshire. 
Form 2. deminuta Cromb. Journ. Bot, 1882, p. 273.—Thallus 
effuse, more or less diffract, the lacinie minute. Apothecia very 
small, pruinose. 
Probably only a starved condition of the preceding form, in which the 
lacinize are either somewhat congested or scattered. In our few speci- 
mens the apothecia are, with one exception, very sparingly present. 
Hab, On the trunks and branches of trees in maritime and upland dis- 
tricts — Distr. Only sparingly in 8S. and W. England, 8. Wales, and the 
Channel Islands.—B, M.: Island of Guernsey. Shanklin and Appuldur- 
combe, Isle of Wight; near Cirencester, Gloucestershire; Dolgelly, 
Merionethshire. 
Form 3. argyphea Nyl. Lich. Scand. (1861) p. 104.—Thallus 
entirely white-pruinose ; lacinie somewhat firm and slightly dilated 
at the circumference. Apothecia constantly pruinose, the receptacle 
often unequal or sometimes subcrenulate.—Cromb. Journ. Linn. Sce. 
Bot, xvii. p. 571.—Parmelia pulverulenta B. argyphea Ach. Lich. 
