LECANOKA.] LECANO-LEClDKja. 385 



Britisli plant, tlioiigli tliere aru two spc'cinien,s from Mr. Miidd in Herb, 

 Brit. Mus. piirjjorting to have been gatliered in the locality cited. 



Ilnb. On calcareous rocks in a maritime district. — Distr. Only in ? N.E. 

 England. B. M. : Hartlepool, Durham. 



Subsp. holocarpa Nyl. Lich. Scand (18G1) p. 145. — Thallus nearly 

 obsolete. Apothccia contiguous, crowded, vitelline or yellow- 

 orange ; spores 0,010-14 mm. long, 0,00(5-10 mm. thick.— Cromb. 

 (Jrevillca, xviii. p. 40; Lich. lirit, p. 47 pro parte; var. holocarpa 

 Lcight. Lich. Fl. p. 222 pro parte, cd. Ji, p. 211 pro parte. — Callo- 

 2nsma lateoaVnun fj. hohjcaqniin Mudd, Man. p. 127 pro parte. 

 Lichen holocarpus Ehrh. Crypt. (17!J3) u. 284. 



Occasionally there are visible slight traces of a thin, dark-greyish, 

 granulose or subfurfuraceous thallus, which, however, is probably not 

 proper. The apothfcia are vei'V numerous and crowded, so that, from 

 mutual pressure, they become angular. 



Hub. On old pales, very rarely on rocks, in lowland and upland situa- 

 tions. — Distr. Seen only from a few localities in Gi'eat Britain. — B. M. : 

 Near Ayton, Cleveland and l-lowcliff, Loftus (sa.xicolous), Yorkshire ; 

 Morpeth, Northumberland. Achmore, Killin, Peithshire. 



46. L. vitellinula Nyl. Flora, 1863, p. 305.— ThaUus subefluse, 

 veiy thin, yellowish or vitelline-yellow (K + purplish). Apothccia 

 small, biatorine, plane, margined, at length convex, viteUiiie {K + 

 purplish); spores polari-bilocular with longitudinal tube, 0,009- 

 0,012 mm. long, 0,004-6 mm. thick.— Cromb. Journ. Dot. (1882) 

 p. 273. 



Closely allied to L. pyracea, from which it differs chiefly in colour and 

 in the size of the spores. The thallus is at times nearl}' evanescent, and 

 the apothecia are usually numerous. Only saxicolous in Britain. 



Hah. On calcareous rocks in maritime and hilly tracts. — Distr. Only 

 sparingly in the Cliannel Islands, S.W. and N. England, the 8.W. 

 Highlands of Scotland, and S.W. Ireland. — B. M. : Noirmout, Island of 

 Jersey ; Sidmouth, Devonshire ; Yattou and "Weston-super-Mare, Somer- 

 setshire ; Overend, Egremont, Cumberland. Island of Lismore, Argyle- 

 shire. Carrigogumal, co. Limerick. 



47. L. luteoalba Njl. ex Lamy, Bull. Soc. Bot. t. xxv. (1878) 

 p. 398.— Thallus effuse, thin, leprose, greyish-white (K — ), 

 often almost obsolete. Apothecia minute, biatorine, orange-yellow, 

 at first innate, plane, with paler entire proper margin, at length 

 convex and immarginate (K -|- purplish) ; spores ellipsoid, 1-septate, 

 0,009-11 mm. long, 0,004-5 mm. thick; paraphyses not very 

 discrete. — Cromb. Grevillea, xviii. p. 46. — CaUopisma luteo-album 

 Mudd, Man. p. 136 pro parte. Lecidea luteo-alba Gray, Nat. Arr. 

 i. p. 475; Hook. Fl. Scot. ii. p. 40. Lichen luteo-albus Turn. 

 Trans. Linn. Soc. vii. (1804) p. 92; Eng. Bot. t. 1426. Lecanora 

 jjyracea^&v. uhnicoJa (DC.) Leight. Lich. Fl. p. "222, ed. 3, p. 211. 

 Lecidea ul mi col a Sm. Eng. Fl. v. p. 185.^^/-i^. Exa. : Leight. n. 84 ; 

 Mudd, n. 98 ; Cromb. n. 61 ; Larb. Lich. Hb. n. 168 ; Bohl. n. 76. 



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