88 LECANO-LECIDEEI [lBCIDEA 



Perthshire; Nigg, Portlethen, and Cove, Kincardineshire; Morrone, 

 Braemar, Aberdeenshire; Glen Nevis, Invemessshire ; Kylemore, 

 Connemara, Galway. 



Form obscurior Cromb. in Leight. Lich. Fl. ed. 3, p. 291 

 (1879). — Thallus rimose-areolate, thinnish, brownish-black; 

 hypothallus predominating. Apothecia sessile, somewhat small ; 

 otherwise as in the type. 



The numerous and crowded hypothalline lines everywhere inter- 

 secting the thallus give it a concolorous aspect. 



Hah. On quartzose rooks in mountainous regions. — Distr. Found 

 only very sparingly in N. Wales and on the N. Grampians, Scotland. 

 — B. M. Llyn Dinas near Beddgelert, Carnarvonshire ; Morrone, 

 Braemar, Aberdeenshire. 



152. L. Kochiana Hepp Lich. Fl. Wurz. p. 61 (1824) ; Nyl. 

 Lich. Scand. p. 223. — Thallus determinate, smooth, rimose- or 

 areolate-diflfract, mouse-coloured or pale-greyish-brown; the areolae 

 plane or somewhat convex (K— , CaCl — ); hypothallus black, 

 limiting the thallus. Apothecia moderate or somewhat large, 

 innate, plane, immarginate, often flexuose- or angulose-difform, 

 black, dark within ; paraphyses discrete ; hypothecium thin, 

 colourless; spores shortly elHpsoid or subglobose, 0,008-11 mm. 

 long, 0,006-8 mm. thick ; hymenial gelatine bluish, the apices 

 of the asci at length wine-red, with iodine. — Cromb. Lich. Brit, 

 p. 79 ; Leight. Lich. Fl. p. 281 ; ed. 3, p. 285. L. rivulosa var. 

 13 Kochiana Mudd Man. p. 199. Biatora rivulosa var. Kochiana 

 Fr. Lich. Eur. p. 271 (1831). 



Differs from the preceding mainly in the absence of intersecting 

 hypothaUine lines, in the darker, inner immarginate apothecia, and 

 the more globose spores. It is a rather variable plant, according to 

 the habitat, but presents only the following well-marked variety. The 

 apothecia, which are even with the thallus, are in a very young state 

 thinly margined, but the margin is speedily evanescent. 



Hah. On rocks and boulders in mountainous regions, — Distr. Only 

 here and there in Great Britain ; not seen from Ireland or the Channel 

 Islands. — B. M. Trellick, Monmouthshire ; Cader Idris, Merioneth ; 

 Pen-y-gwryd, Snowdon, Carnarvonshire ; Craig Eossie, The Ochils, 

 and Ben-y-Gloe, Perthshire ; Upper Glen Dee and Morrone, Braemar, 

 Aberdeenshire ; Hills of Applecross, Bossshire. 



Var. lygsea Leight. Lich. Fl. p. 282 (1871).— Thallus dark, 

 umber-brownish-coloured, effuse, continuous, smooth, slightly 

 cracked-areolate. Apothecia smaller than in the type. — Leight. 

 Lich. Fl. ed. 3, p. 286. Lecidea lygaea Ach. Syn. p. 34 (1814) 

 excl. var. 



Distinguished by the thumer and smoother thaUus and by the 

 minute apothecia. Occasionally the thallus is intersected and limited 

 by the dark hypothallus and the apothecia are rather larger. 



Hah. On rocks in maritime and mountainous regions. — Distr. 

 Somewhat rare in the Channel Islands, Wales, the Grampians of 



