CALICIUM | CALICIACE® 17 
granulose, greyish, sometimes obsolete. Apothecia small, black, 
the stalk short and stoutish, the capituium somewhat top-shaped- 
cylindrical, white-pruinose at the margin, with the sporal mass 
generally much protruded; spores ellipsoid, l-septate, 7-14 » 
long, 4-7 » thick; hymenial gelatine frequently bluish with 
iodine.—Hook. in Sm. Engl. Fl. v. p. 140; Mudd Man. p. 257 ; 
Leight. Lich. Fl. p. 44; ed. 3, p. 43. C. quercinum subsp. curtum 
Nyl. Syn. p. 156 (1860); Cromb. Lich. Brit. p. 13. Phacotrum 
(Phacotium) curtum 8. F. Gray Nat. Arr. i. p. 485 (1821). 
Ezsicc. Bohl. n. 99; Cromb. n. 113; Johns. n. 169; Larb. 
Lich. Hb. nos. 83, 321; Leight. n. 133; Mudd n. 99. 
Differs from the preceding in having the capitulum pruinose at the 
margin only, and in the protruded sporal mass which gives the 
apothecium ‘“‘a miniature resemblance to a painter’s brush” (Turn. 
& Borr. 1. ¢.). The apothecia vary considerably in size even on the 
same specimen; they are usually numerous and crowded. The 
prominent black spermogones are frequent and often congregate. 
Hab. On old palings and decayed branches of trees, chiefly oaks 
in wooded districts.—Distr. General and plentiful in most parts of 
Great Britain, but local and scarce in the Channel Islands and 
Ireland.—B. M. Guernsey; Lyndhurst, New Forest, Hants ; Bolney, 
Washington and Tilgate, Sussex: near Hythe, Kent; Shiere, Surrey; 
Braydon Forest, Wilts; Tetsworth, Oxfordshire; Gopsall Park and 
Bradgate Park, Leicestershire; Hay Park, Herefordshire; Hatfield, 
near Worcester; Church Stretton, Oswestry and Stiperstones, Shrop- 
shire; Bala and Aberdovey, Merioneth; Walthamstow, Langford and 
Epping Forest, Essex; Bury, Suffolk; Middle Forest, Westmoreland ; 
near Ayton and Bousdale Gill, Cleveland, Yorkshire; Teesdale, Dur- 
ham; Wark-on-Tyne, Northumberland; New Galloway, Kireud- 
brightshire; Barcaldine and Glen Falloch, Argyll; Loch Rannoch, 
Killin, Craig Calliach and Blair Athole, Perthshire; Countesswell’s 
Wood, near Aberdeen ; Castlemartyr, Cork. 
Capitulum not pruinose. 
7. C. pusillum Floerke Deutsche Lich. 10, p. 6 (1815).— 
Thallus in greyish or whitish spots or obsolete. Apothecia small, 
entirely black, the stalk slender ; capitulum top-shaped, with a 
flat or convex disc ; spores fusiform or clavate, l-septate, some- 
times slightly constricted in the middle, 5-l0p long, 2°5-5 pu 
thick.—Cromb. in Journ. Bot. xx.-p. 272 (1882). 
Resembling a minute form of C. quercinum. In the few British 
specimens the thallus is obsolete and the apothecia are scattered. 
Hab. On decorticated wood in wooded situations.—B. M. Castle- 
martyr, Cork. 
8. C. debile Turn. & Borr. ex Sm. Engl. Bot. t. 2462 (1812) 
& Lich. Brit. p. 151.—Thallus very thin, greyish-white, or 
wanting. Apothecia small, scattered, the stalk short and slender, 
the capitulum lens-shaped or somewhat top-shaped ; sporal mass 
compact ; spores fusiform ellipsoid, nearly always simple, about 
ip c 
