ALECTORIA.] ALECTORIEI. 213 



Tlie simpler, less intricate thallus, which is usually more compressed at 

 the axils, more shortly and remotely branched, thicker, flexuose aud less 

 sorediate than in A. jubata, entitles this to be viewed as a subspecies. 

 The apothecia have never been detected, and the spermogones are absent 

 in our specimens. 



Hal). Among mosses on rocks and boulders in upland and mountainous 

 districts. Distr. General and not uncommon in England and N. Wales ; 

 plentiful among the Grampians, Scotland ; not seen from Ireland. 

 B. M. : Thetford Warren, Norfolk ; Bridge Rocks, near Tuubridge Wells, 

 Sussex ; Templemore and Dartmoor, Devonshire ; near Malvern and 

 Herefordshire Beacon, Worcestershire ; Cader Idris, Merionethshire ; 

 Snowdon, Carnarvonshire; Island of Anglesea; Battersby, Cleveland, 

 Yorkshire ; Gateshead Fell, Durham ; Suddale, Westmoreland. Ben 

 Cruachan, Argyleshire ; Ben More and Ben Lawers, Perthshire ; Clova 

 Mts., Forfarshire ; Craig Coinnoch, Glen Cluny, Lochnagar, and Ben- 

 naboord, Braemar, Aberdeenshire ; Ben Nevis and Loch Ennich, Inver- 

 ness-shire. 



Subsp. 2. A. subcana Nyl. ex Cromb. Journ. Bot. 1876, p. 360. 

 Thallus pendulous, filiform, subelongate, much branched, greyish- 

 white (K~, CaCl~); soredia small, somewhat prominent, whitish. 

 Apothecia not seen. 



Very similar in colour to A. implexa f. cana, for which but for the 

 absence of any reaction it might readily be mistaken. The thallus is less 

 elongate, more slender, with the branches less entangled than in A.jubata, 

 while the soredia also are different. It has not been found fertile. 



Hab. On the branches of old firs in wooded mountainous tracts. Distr. 

 Very local among the Grampians, Scotland. B. M. : Ben Lawers, Perth- 

 shire ; Glen Derrie, Braemar, Aberdeenshire. 



6. A. implexa Nyl. ex Norrl. Med. Soc. pro F. et Fl. Fenn. i. 

 (1876) p. 14. Thallus pendulous, elongate, filiform, subrounded, 

 very much branched and entangled, slender and flaccid, greyish- 

 yellow or greyish -white, with whitish or greyish scattered soredia 

 (K+ Y ellowish , c a d-). Apothecia as in the preceding species. 



Usnea implexa Hoffm. Deutsch. Fl. ii. (1795) p. 134. Alectoria 

 cana Leight. Lich. Fl. p. 88. Alectoria capillaris Cromb. Journ. 

 Bot. 1372, p. 233; Leight. Lich. Fl. ed. 3, p. 79. This is the 

 Lichen jubatus pro parte of Linnaeus and of some of the older British 

 authors. 



Similar in habit to A.jubata, of which it has usually been considered 

 a variety, but from which it is separated by the more slender and differ- 

 ently-coloured thallus, and especially by the reaction. It has a still closer 

 resemblance to A. sarmentosa f. crinalis Ach., with which, in countries 

 where both are frequent, it is apt to be confounded. It is often almost 

 entirely esorediate. It is very rarely fertile, and the few British speci- 

 mens are sterile. 



Hab. On the trunks of old firs in mountainous districts. Dustr. Very 

 local and rare in N. England and the Grampians, Scotland. B. M. : York- 

 shire. Killm, Perthshire ; Deerhill Wood, Forfarshire ; Mar Forest,, 

 Braemar, Aberdeenshire ; Rothiemurchus Woods, Inveruess-shire. 



