ALECTORIA | USNEACE 183 
Thallus mostly light in colour. 
1. A. ochroleuca Nyl. in Mém. Soc. Sci. Nat. Cherb. v. p. 98 
(1857).—Thallus erect, czspitose, the main branches stoutish, 
rather flattened, soraliate and impressed-lacunose, the ultimate 
branchlets numerous, spreading, more cylindrical, slender and 
attenuate, ochroleucous or whitish straw-coloured, the apices 
recurved and usually blackish (Kf + %"*, CaCl —). Apothecia 
rare, rather large, sessile, brownish-red or blackish, the margin 
stoutish and inflexed or almost excluded; spores becoming brown, 
28-42 w long, 14-24 » thick.—Mudd Man. p. 70; Cromb. Lich. 
Brit. p. 24; Leight. Lich. Fl. p. 87; ed. 3, p. 79. Lichen ochro- 
leucus Ehrh. Beitr. ili. p. 82 (1788); Dicks. Pl. Crypt. fase. iii. 
p. 19; With. Arr. ed. 3, iv. p. 46 pro parte ; Engl. Bot. t. 2374. 
Cornicularia ochroleuca Ach. Lich. Univ. p. 614 (1810) ; Hook. 
Fl. Scot. ii. p. 69 & in Sm. Engl. Fl. v. p. 228. 
Exsicc. Cromb. n. 126. 
The dark colour is confined to the apices in British specimens, 
though in the Arctic regions it extends over the greater part of the 
thallus. Apothecia are borne on the thicker branches. 
Hab. Among mosses and gravelly soil in alpine places.—Distr. 
Confined to the higher Grampians, on or near their summits.—B. M. 
Cairngorm and Cairntoul, Braemar, Aberdeenshire; Clova Mts., 
Forfarshire. 
Form tenuior Cromb. in Journ. Bot. x. p. 232 (1872).— 
Thallus smaller, decumbent, the branches more slender and some- 
what entangled. Apothecia small, pale reddish-brown.—Leight. 
Lich. Fl. ed. 3, p. 79. Lichen sarmentosus Sm. Engl. Bot. t. 2040 
(smaller fig.) fide Crombie. 
This form has been considered by Crombie as belonging to the 
above species rather than to A. sarmentosa. In one single specimen 
there is only a slight trace of dark colour at the apices. It is not to 
be confused with A. crinalis Leight. which is a synonym of A. ochro- 
leuca var. cincinnata. 
Hab. On sterile ground in alpine places.—B. M. Ben Luighal, 
Sutherlandshire, the only locality. 
Var. cincinnata Th. Fr. Lich. Arct. p. 27 (1860).—Thallus 
decumbent, sparingly branched, entangled, cylindrical or un- 
equally compressed, impressed-lacunose, pale greenish sulphur- 
coloured, generally with an apical tuft of slender branchlets which 
are sparingly blackish, the whole thallus often tinged here and 
there bluish-black.— Leight. Lich. Fl. p. 88 ; ed. 3, p. 79 ; £. cincin- 
nata Cromb. Lich. Brit. p. 24 (1870); var. sarmentosa Cromb. 
Lich. Brit. p. 24 (1870) ; var. erinalis Leight. Lich. Fl]. p. 88 (1871). 
A. sarmentosa 8. F. Gray Nat. Arr. i. p. 408 (1821); Hook. Fl. 
Scot. ii. p. 68 & in Sm. Engl. Fl. v. p. 227; Mudd Man. p. 70; 
var. cincinnata Ny]. in Flora lii. p. 444 (1869); Cromb. in 
Grevillea xv. p. 79 (1886) & Monogr. i. p. 209. Lichen ochroleucus 
