ALECTORIA. | ALFCTORIFT. 211 
margin thin, at length exciuded; spores 0,021-35 mm. long, 0,015 
—20 mm. thick.—Carroll, Journ. Bot. 1865, p. 287; Cromb. Lich. 
Brit. p. 24; Leight. Lich. Fl. p. 87, ed. 3, p. 78.—Oornicularia 
ochroleuca (3. nigricans Ach. Lich. Univ. (1810) p. 615.—Brit. Eus. : 
Cromb. n. 19. 
The thallus, which is at length free, and, except in colour, like that of 
A. ochroleuca, is often blackish almost throughout, though sometimes 
only towards the apices. When long preserved in herbaria it becomes 
reddish, avd tinges the paper of the same colour. The apothecia have 
been found only in Labrador and Arctic N. America. With us the sper- 
mogones are not uncommon. They are somewhat protuberant, most 
oe iihadaa the apices, with spermatia 0,007 mm. long, about 0,001 
mm, thick. 
Hab. Among mosses on the ground and on rocks, in alpine and sub- 
alpine situations.— Distr. Somewhat local, but usually plentiful on several 
of the higher Grampians, Scotland ; very sparingly on mts. in N. Wales ; 
doubtfully on those of N. England—B.M.: Cwm Bychan, Merioneth- 
shire; The Glyders and Carnedd Llewelyn, Carnarvonshire ; ? Teesdale, 
Durham. Ben Lawers and Mael Girdy, Perthshire; Ben-y-Gloe and 
Cairn Gowar, Blair Athole; Ben-naboord, Morrone, and Ben Macdhui, 
Braemar, Aberdeenshire; Ben Nevis, Inverness-shire. 
5. A. jubata Nyl. ex Cromb. Journ. Bot. 1872, p. 233.—Thallus 
elongate, pendulous, filiform, subrounded, somewhat rigid, much 
branched, sorediiferous, olive-brown or brownish black, rarely 
paler; branches entangled, smooth, subconcolorous at the apices 
(K_, CaCl—). Apothecia innato-sessile, affixed to geniculations of 
the thallus, small, plane or convex, the margin entire, at length 
excluded ; spores 0,006-9 mm. long, 0,004-5 mm. thick.—Gray, 
Nat. Arr. i. p.408; Hook. Fl. Scot. ii. p.67; Sm. Eng. Fl. v. p. 227; 
Tayl. in Mack. Fl. Hib. ii. p. 86; Mudd, Man. p. 70 pro parte; 
Cromb. Lich. Brit. p. 24 pro parte; Leight. Lich. Fl. p. 88 pro 
parte, ed. 3, p. 80.—Lichen jubatus Linn. Sp. Pl. (1753) p. 1155 
pro parte; Huds. Fl. Angl. p. 461 pro parte; Lightf. Fl. Scot. ii. 
p. 891 pro parte ; With. Arr. ed. 3, iv. p.46; Eng. Bot. t. 1880 pro 
parte. Usnea jubata nigricans Dill. Muse. 64, t. 12. f. 7.  Lichen- 
oides quod Muscus corallinus sawatilis foniculaceus Dill. in Ray Syn. 
p. 65, n. 7.—Brit. Exvs.; Leight. n. 72; Mudd, n. 37; Cromb. 
n. 128 (pallidior); Bohl. n. 83. 
The thallus of this-well-known plant, of which the type is A. proliva 
Ach. Lich. Univ. p. 592, is in its young state suberect, as it frequentl 
appears on old fir pales. Usually it is more or less sprinkled with whitis 
or greyish soredia, which are especially abundant in the less elongate or 
suberect states. It is one of our most social lichens, frequently along 
with Usneas completely covering the trunks and branches of firs in 
Highland woods and forests. The apothecia are extremely rare in Great 
Britain, owing, no doubt, to so many old forests having been felled. The 
spermogones, which are also very rare, are inclosed in scattered thalline 
tubercles, with spermatia 0,006-7 mm. long, about 0,005 mm. thick. 
Hab. On the trunks and branches of old trees, chiefly pine and larch, 
as also on boulders among mosses, in wooded upland and subalpine regions, 
P2 
