210 LICHENACEI. [ALECTOKIA. 



sulphur-coloured ; branches very much divaricate, long, attenuate, 

 concolorous or sparingly blackish at the apices (K~, CaCLT -M'-h)' 

 Apothecia lateral, becoming brownish-black, the margin entire. 

 Cromb. Grevillea, xv. p. 79. AJectoria ochroleuca var. cincinnata 

 Leight. Lich. Fl. p. 88, ed. 3, p. 79. Evernia ochroleuca b. cin- 

 cinnata Fr. L. E. (1830) p. 22. Alectoria ochroleuca var. sannentosa 

 Cromb. Lieh. Brit. p. 24. Alectoria sarmentosa Gray, Nat. Arr. i. 

 p. 408 ; Hook. Fl. Scot. ii. p. 68 ; Sm. Eng. Fl. v. p. 227 ; Mudd, 

 Man. p. 70. Lichen ochroleucus With. Arr. ed. 3, iv. p. 46 pro parte. 

 As specimens in herbaria show, this was mistaken by our earlier 

 and some later writers for A. sarmentosa (cfr. Cromb. Journ. Bot. 

 1872, p. 232). Brit. Exs. : Cromb. n. 18. 



The thallus often bears large foveolate and scrobiculate concolorous 

 excrescences, and usually is here and there tinged of a bluish-black colour. 

 The apothecia do not occur in this country, and the spermogones are very 

 rarely seen. 



Hob. On the ground in alpine places, creeping loosely over mosses and 

 the stems of Azalea procumbens. Distr. Very local, though somewhat 

 plentiful on a few of the higher N. Grampians, Scotland. B. M. : Ben- 

 naboord, Morrone, Ben Macdhui, Cairngorm, Braemar, Aberdeenshire. 



I. Apothecia lateral : spores 8nae, small, colourless (Bryopogon Link. 

 Handb. (1833) p. 164 pro parte). 



3. A. divergens Nyl. Lich. Scand. (1861) p. 71. Thallus caespi- 

 tose, erect or prostrate, robust, rigid, and fragile, somewhat rounded 

 or subangular, shining, often much branched, brownish-chestnut- 

 coloured ; branches dichotomously diverging (K~, CaCl ^ d red ). 

 Apothecia bright-brown, the margin usually crenulate or rough ; 

 spores 0,008-10 mm. long, 0,0045-55 mm. thick. Cromb. Journ. 

 Bot. 1873, p. 133 ; Leight. Lich. Fl. ed. 3, p. 78.Cornieularia 

 divergens Ach. Heth. (1803) p. 303. 



This is like larger states of Cetraria aculeata, from which, however, it is 



ished by 

 reaction with CaCl', and the nature of the spermogones. In the few 



, 



well distinguished by being more robust, not spinulose, by the medullary 

 ' 



specimens gathered in Britain the thallus is less developed than in those 

 from Arctic regions, and is destitute of the white points which elsewhere 

 pre sometimes present, arising from the rupture of the cortical layer. 

 The apothecia have as yet been detected only in N.E. Asia. 



Hob. On the ground among mosses in alpine places. Dintr. Found 

 only on one of the higher N. Grampians, Scotland. B. M. : Cairngorm, 

 Braemar, Aberdeenshire. 



4. A. nigricans Nyl. Lich. Scand. (1861) p. 71. Thallus caespi- 

 toso-fruticulose, erect or ascending, rigid, somewhat rounded, dicho- 

 tomously and intricately branched, livid- or chestnut-bjack, paler 

 towards the base, opaque, branches more or less deflexed at the 

 apices, the axils somewhat lacunoso-impressed (KT . 11 *- K ' 

 l 7 re( j,3i8h)- Apothecia lateral, moderate, badio-brownish, the 



