ALECTORIA | USNEACE® 185 
4. A. implexa Nyl. ex Norrl. in Med. Soc. Faun. & FI. 
Fenn. i. p. 14 (1876).—Thallus pendulous, elongate, slender, 
much branched and entangled, greyish-yellow or greyish, soralia 
very rare (K+, CaCl—). Apothecia and spores as in A. jubata, 
very rare.—A. jubata var. cana Ach. Lich. Univ. p. 593 (1810). 
A. cana Leight. Lich. Fl. p. 88 (1871). A. capillaris Cromb. in 
Journ. Bot. x. p. 233 (1872); Leight. Lich. Fl. ed. 3, p. 79. 
Usnea implexa Hoftm. Deutschl. Fl. ii. p. 134 (1795). Parmelia 
jubata var. capillaris Ach. Meth. Lich. p. 273 (1803). 
Similar in habit to A. jwbata, but more slender and of a lighter 
colour and with a positive reaction with potash. British specimens 
are sterile. 
Hab. On the trunks of old firs in mountainous districts.—Dvstr. 
Local and rare in N. England and the Grampians, Scotland.—B. M. 
Killin, Perthshire; Deerhill Wood, Forfar; Glen Derrie, Braemar, 
Aberdeenshire; Rothiemurchus Woods, Invernessshire. 
Thallus mostly dark in colour. 
5. A. nigricans Nyl. Lich. Scand. p. 71 (1861).—Thallus 
cespitose, rigid, erect or ascending, cylindrical or somewhat 
compressed, dichotomously and intricately branched, impressed- 
lacunose at the axils, and more or less deflexed and slender 
at the tips, rather dull chestnut-black, paler towards the 
base (K + medulla yellow at base, CaCl + medulla reddish). 
Apothecia lateral, rather large, chestnut-brown, the margin thin, 
at length excluded; spores colourless, 21-35 p long, 15-20 p 
thick.—Carroll in Journ. Bot. iii. p. 287 (1865) ; Cromb. Lich. 
Brit. p. 24; Leight. Lich. Fl. p. 87; ed. 3, p. 78. Cornicularia 
ochroleuca var. nigricans Ach. Lich. Univ. p. 615 (1810). 
Exsicc. Cromb. n. 19. 
Similar in habit to A. ochrolewca, but differs in colour. Herbarium 
specimens are generally easily recognized by the reddish tinge given 
to the paper on which they are mounted. Spermogones occur towards 
the apices, but apothecia have been found only in Labrador and Arctic 
America. A specimen in the Sowerby Herbarium is said to have been 
collected by Harriman at Teesdale, Durham. 
Hab. Among mosses on the ground and on rocks in alpine and 
subalpine localities.—Distr. Somewhat local, but usually plentiful on 
the higher Grampians, Scotland; very rare in Wales, doubtful in N. 
England.—B. M. Cwm Bychan, Merioneth ; The Glyders, Carnarvon- 
shire; Teesdale, Durham ? Ben Lawers, Mael Girdy, Ben-y-Gloe and 
Cairn Gowar, Blair Athole, Perthshire; Ben-naboord and Ben Macdhui, 
3raemar, Aberdeenshire; Ben Nevis, Invernessshire. 
6. A. bicolor Nyl. in Act. Soc. Linn. Bord. sér. 3, i. p. 291 
(1856).—Thallus czspitose, erect, cylindrical, irreguiarly and 
densely branched and intricate, the branchlets patent, short, 
slender or subfibrillose, the apices usually somewhat curved, black 
or brownish-black. Apothecia lateral, small, very rare, blackish ; 
