LECANORA, | LECANO-LECIDEEI. 397 
thallus and apothecia, and more especially in the smaller spores. The 
two specimens seen are well fertile. 
Hab. On granitic rocks in a maritime district.— Distr. Only very 
sparingly in S.W. England.—B. M.: Near Penzance, Cornwall. 
63. L. roboris Nyl. Flora, 1869, p. 412.—Thallus determinate 
or subdeterminate, thinnish, continuous, granuloso-unequal, whitish 
or greyish-white (K+yellow, CaCl—); hypothallus black, often 
indistinct. Apothecia moderate or somewhat large, blackish, the 
thalline margin at length crenate; spores 0,015-18 mm. long, 
0,006-9 mm. thick.—-Duf. Hb. jide Nyl. Mém. Soc. Sc. Nat. Cherb. 
t. ii. (1854) p. 326; Cromb. Grevillea, xviii. p. 46.—L. sophodes 
forma roboris Leight. Lich. Fl. p. 225, ed. 3, p. 215.— Brit. Eas. : 
Larb. Lich. Hb. n. 260, 
Often confounded with L. sophodes, but distinct in the colour and more 
especially in the reaction of the thallus with K, as also in the larger apo- 
thecia and their crenulate margin. The thallus at times is somewhat 
effuse, with the hypothallus visible only here and there at the circum- 
ference. The apothecia are generally numerous, though not crowded. 
Hab. On trunks of trees, chiefly oaks, very rarely on the stems of heather, 
in maritime and upland situations.—Distr. Not unfrequent in England ; 
rare in N. Wales, 8. and N.W. Ireland ; not seen from Scotland. —B. M.: 
East coast of Jersey; D’Ixcart, Island of Sark. Yarmouth, Suffolk ; 
Epping Forest, Essex ; Danny, Sussex; New Forest, Hants; Ilsham, 
Torquay, Devonshire ; Launceston and Penzance, Cornwall; Savernake 
Forest, Wilts ; Charnwood Forest, Leicestershire ; near Worcester ; near 
Harboro’ Magna, Warwickshire ; Cwm Bychan, Merionethshire; Tees- 
dale, Durham; Calder Abbey, Cumberland; Felton Woods, Northum- 
berland; Leven’s Park, Westmoreland. Carrigaloe, near Cork ; Dough- 
ruagh mt., Connemara, co. Galway. 
64. L. confragosa Nyl. ex Lamy, Bull. Soc. Bot. Fr. t. xxv. 
(1878) p. 404.—Thallus effuse, thin, granulose or verrucoso-areo- 
late, greyish- or sordid-white, the granules scattered or subcon- 
tiguous (K +yellow, CaCl—); hypothallus usually obsolete. Apo- 
thecia sessile, submoderate, plane, brownish-black or nearly black, 
the thalline margin at length inflexed and crenulate; spores ellip- 
soid, obtuse at the apices, 0,018-23 mm. long, 0,009-13 mm. thick. 
—lTeight. Lich. Fl. ed. 8, p. 222.—L. sophodes var. confrayosa 
Cromb. Lich. Brit.p.49 pro parte. Purmelia confragosa Ach. Meth. 
Suppl. (1803) p. 38.—Brit. Exvs.: Larb. Caesar. n. 28; Lich. Hb. 
n. 301. 
Looks almost a saxicolous state of Z. roboris, but differs in the less 
continuous thallus and in the larger spores. In the British specimens 
the thallus, which rarely has a greyish-green tinge, is but seldom con- 
tinuous, and the hypothallus is scarcely visible. The apothecia are 
numerous, here and there crowded, and then almost obliterating the 
granules. Subsp. ZL. crassescens Nyl. was erroneously recorded as British 
in Grevillea, xviii. p. 46. 
Hab. On rocks, granitic and schistose, in maritime and upland tracts.— 
Distr. Sparingly in the Channel Islands, S. England, N.E. Scotland, S.E. 
