AI.KCTORIA.] ALECTORIKT. 2\ I 



margin thin, at length excluded ; spores 0,021-35 mm. long, 0,01o 

 -20 mm. thick. — Carroll, Jourii. Bot. 1865, p. 287 ; Cromb. Lich. 

 Brit. p. 24 ; Lci<?ht. Lich. ¥1. p. 87, ed. 3, p. 7S.—CornicHlnria 

 ochroleiica i3. nir/ricans Ach. Lich. Univ. (1810; p. 015. — Brit. Exs. : 

 Cromb. n. 10. 



Tlie tlialliis, which is at lenfrth free, and, except in colour, like that of 

 A. oc/iru/fiica, is often blacki.sii almo:<t throughout, though .sometimes 

 ouly towards the apices. When long preserved in herbaria it becomes 

 reddish, aud tinjres the paper of the same colour. The apothecia have 

 been found only in Labrador and Arctic X. America. With us the sper- 

 mogones are not uncDUiinon. They are somewhat protuberant, most 

 frequent towards the apices, \%'ith 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 sparinirly on mts. in X. Wales ; 

 doubtfully on those of X^. England.— B. M. : Cwm Bychan, Merioneth- 

 shire ; The (^lyders and Carnedd Llewelvn, Carnarvonshire ; ? Teesdale, 

 Durham. Ben Lawers and Mael Girdy, Perthshire; Ben-y-Gloe and 

 Cairn Gowar, Blair Athole ; Ben-naboord, MoiTone, and Ben Macdhui, 

 Braemar, Aberdeenshire ; Ben Xevis, Inverness-shire. 



5. A. jubata Xvl. ex Cromb. Journ. Bot. 1872, p. 233.— Thallus 

 elongate, pendulous, filiform, subi'ounded, 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 geniciilations 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, 

 Xat. 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 juhatus Linn. 8p. PL (1753) p. 1155 

 pro parte ; Huds. Fl. Augl. 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 juhata nigricans Dill. Muse. 64, t. 12. f. 7. Lichen- 

 oides quod MuscKS corallinus saxatilis fienicalaceus Dill, in Ray Syn. 

 p. 65, n. 7. — Brit. Kcs. : Leight. n. 72 ; Mudd, n. 37 ; Cromb. 

 n. 128 (pallidior) : Bohl. n. 83. 



The thallus of this well-lniown plant, of which the type is A. prolixa 

 Ach. Lich. Univ. p. .59:?, is in its young state suberect, as it frequently 

 appears on old fir pales. Usually it is more or less spnnkled with wlfitish 

 or greyish soredia, which are especially abundant in the less elmgate 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, owhig, no doubt, to so many old forests having been felled. The 

 spei-mogones, 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 



