212 LICHEXACKI. [aLECTOEIA. 



— Disfr. General in the hilly and mountainous tracts of Great Britain — 

 verv abundant amongst the Grampi-^ns. Scotland : rare in Ii-eland. — B. M : 

 St. Leonards, Sussex : New Forest, Hants ; Hay Tor, Dartmoor, Devon- 

 shire ; Helminton and Roughton, Cornwall ; Charnwood Forest. Leicester- 

 shire : Gamliugay Park. Cambridgeshire : near Kingley, Warwickshire ; 

 near Oswestry, Shropshire ; Dolgelly, Aberdovev; and near Barmouth, 

 Merionethshire : Baysdale and near Great Ayton, Cleveland, Yorkshire ; 

 Teesdale, Durham : Keswick and Alston, Cumberland ; The Cheviots, 

 Northumberland. Xew Galloway, Kirkcudbrightshire ; Beld Craig, 

 MofPat. Dumfriesshire ; Pentland Hills, near Edinburgh ; Appin, 

 Argvleshire : Glen Falloch, Killin (frt.), Ben Lawers, and Knock of 

 Crieff, Perthshire: Deerhill Wood. Forfarshire (frt.); Countess welld 

 Wood, near Aberdeen : Ballochbuie Forest, Craig Cluny, and Mar Forest, 

 Braemar ; Rothiemurchus Woods, Glen Xevis, and Glen Morriston, Inver- 

 ness-shire : Lairg. Sutherlandshire. Killiney Hills, near Dubhn ; Luggle- 

 law, CO. Wicklow ; near Innishowen, co. Donegal. 



Tar. /3. lanestris Ach. Lich. Univ. (1810) p. 593. — Thalki.s some- 

 what small, prostrate, rather soft, verj- sparingly sorediiferous, 

 brownish-black or blackish ; branches short, slender, densely en- 

 tangled. Apothecia not seen. — Cromb. Journ. Bot. 1872, p. 233. — 

 Lichen juhatus Eng. Bot. t. 1880 (upper fig.). 



This variety, which superficially resembles Pannelia lanata. is well 

 distinguished by the smaller, denser, more tender thallus, and by the 

 almost entire absence of soredia. The fructification has apparently never 

 been observed, even in countries where the plant is more common. 



Hah. On old fir pales in mountainous districts. — Disfr. Local and rare, 

 in W. England and among the Grampians. Scotland : no doubt to be 

 detected elsewhere. — B. M. : Helsby Hill, Cheshire. Killin, Perthshire ; 

 Braemar, Aberdeenshire ; Rothiemurchus, Inveniess-shii'e. 



Form tenerrima Cromb. Grevillea, xv. (1886) p. 48. — ThaUus 

 smaller, very much branched ; branches short, very slender, fragile, 

 soft and much interwoven. 



At first sight might readily be mistaken for an Ephebe. It is always 

 sterile. 



Hab. On the trunks of old birch trees in upland situations. — Distr. 

 Very local and rare among the N. Grampians, Scotland. — B. M. : 3lorrone, 

 Braemar, Aberdeenshire. 



Subsp. 1. A. dialyljeiforiiiis Xyl. e.r Cromb. Grevillea, xv. p. 48. — 

 Thallus subfiliform, prostrate, flexuose, rigid, divaricately branched, 

 sparinglv sorediate. olive- or brownish-black (or dark leaden- 

 coloured), often a little paler at the apices ; branches short, remote 



(lv~, CaCl~). Apothecia not seen. — Alectoria juhaia var. chulif- 



heiformis Ach. Lich. Univ. (1810) p. 51i2; Hook. FL Scot. ii. p. 67 ; 

 Sm. Eng. Fl. v. p. 227 ; Mudd, Man. p. 70 ; Cromb. Lich. Brit, 

 p. 24 : Leight. Lich. Fl. p. 89, ed. 3, p. 80. — Ahctoria diahjhei- 

 fiirmis Gray, Xat. Arr. i. p. 408. Lichen chalyheiformis Linn. Sp. 

 I'l. (1753) p. 1155 ; With. Arr. ed. 3, iv. p. 47. Usnea ri<jida hor- 

 snm vorsinn e.rtensa Dill. Muse. 66, t. 13. f. 10. Lichenoides caule 

 riffido, in-Hor Jili chaJi/hei Dill in Ray Svn. ed. 3, p. 65, n. 2. — 

 lint. E.r.<!. : Larb. Lich. Hb. n. 245. 



