LECIDEaJ LECIDEACEiE 53 



Exsicc. Cromb. n. 181 : Leight. iios. 126, 137, 328 ; Mudd nos. 

 169, 170; Baxt. Sbirp. Crypt. Ox. n. 19; Bohl. n. 45; Johns, n. 345. 



Distinguished from the type by the differently coloured thallus 

 and apothecia which at first sight would almost seem to render it 

 specifically distinct. The apothecia are usually smaller and more 

 numerous than in the type. When the thallus is limited and 

 intersected by the hypothallus in frequent black serpentine lines, it 

 is var. limitata Ach. Lich. Univ. p. 175 (1810) pro parte; Cromb. 

 Lich. Brit. p. 77. 



Hah. On trees. — Distr, Common throughout the British Isles. — 

 B. M. Sark ; Tregawn and Withiel, Cornwall ; Newton Bushell, 

 Ilsham, Torquay ; Ullacombe, near Bovey Tracey, Devon ; New 

 Forest, Hants ; St. Leonard's Forest, and Fairlight, near Hastings, 

 Sussex ; Shiere, Surrey ; Lydd, Kent ; Epping Forest, Essex ; Oxford ; 

 Twycross, Leicestershire ; near Bath, Somerset; near Shrewsbury and 

 Oswestry, Shropshire ; Malvern, Worcestershire ; Barmouth and 

 Dolgelly, Merioneth ; Haileywood, Cirencester, Gloucestershire ; 

 x\bergavenny, Monmouthshire ; near Ayton, Cleveland, Yorkshire ; 

 Baldoran Woods, Forfarshire ; Glen Lochay, Killin, Perthshire (var. 

 limitata) ; Morrone, Braemar, Aberdeenshire ; near Inverary, Argyll ; 

 Applecross, Ross. 



81. L. latypea Ach. Meth. Suppl. p. 10 (1803).— Thallus 

 effuse, thickish, unequal, granular-areolate, whitish or greyish- 

 white (K + yellow, CaCl -f orange-red) ; hypothallus usually 

 obsolete. Apothecia small or sometimes rather large, black, 

 plane with a thin margin becoming convex and immarginate ; 

 liypothecium thick, brownish or dark-brown ; paraphyses sub- 

 coherent, dark-bluish-green or almost black at the tips ; spores 

 ellipsoid, 0,010-15 mm. long, 0,005-8 mm. thick. — L. parasema 

 var. latypea Nyl. Lich. Scand. p. 217(1861); Cromb. Lich. Brit, 

 p. 77 ; Leight. Lich. Fl. p. 269 ; ed. 3, p. 270. L. coniops Mudd 

 Man. p. 201 (1861), (non Wahl). L. continuior Nyl. in Flora Ix. 

 p. 463 (excl. var.) (1877) ; Leight. Lich. Fl. ed. 3, p. 277. 

 Exsicc. Larb. Lich. Hb. n. 103. 



Differs from L. parasema in habitat, in the thicker granular thallus 

 which is either conglomerate or broken up and scattered, and in the 

 somewhat darker hypothecium. The apothecia are plane and scattered 

 or sometimes subconfluent with the margin evanescent. I have 

 not seen specimens of L. continuior ; Nylander says it differs only in 

 the rather flat rimose-areolate thallus and the more rapid reaction 

 with hypochlorite of lime. 



Hah. On granitic and schistose rocks in maritime and upland 

 districts. — Distr. Somewhat general throughout Great Britain. — B. M. 

 Islands of Alderney and Sark ; Vale Castle, Guernsey : Mount Orgueil 

 Castle, Jersey ; Bolt Head, and near Plj^mouth, Devon ; Gerrans, and 

 near Penzance, Cornwall ; Bellleigh, near Maldon and tilting, Essex ; 

 near Norton, and near Malvern, Worcestershire ; Langbaurghrigg, and 

 near Ayton, Cleveland, Yorkshire; Aberdovey, Merioneth; Barcaldine, 

 Argyll ; Nigg and Portlethen, Kincardineshire ; Ben Lawers, Perth- 

 shire ; Sybil Head, Kerry ; Dawros Cliffs, near K3demore, and near 

 Letterfrack, Connemara, Galway ; Lambay Island, Dublin ; Borris, 

 Carlow. 



