348 LICHENACEI. [LEPROLOMA. 



59. LEPROLOMA Nyl. Flora, 1883, p. 107. Thallus mono- 

 phyllo-lobate, submembranaceous, soft, pulverulent on the surface, 

 containing gonidia. Apothecia and spermogones unknown. 



A pseudo-genus separated by Nylander from Amphiloma (now restricted 

 to exotic species) on account of the thallus b^ing leprarioid and always 

 sterile. Indeed in Lich. Scand. p. 129, he had said in regard to the single 

 species of which it consist?, " it is possible that our lichen may be a de- 

 graded state of a type which we do not yet know." In the absence of 

 fructification, its systematic place is quite uncertain. 



1. L. lanuginosain Nyl. Z. c. Thallus orbicular or subeffuse, 

 granuloso-pulverulent in the centre, white or yellowish-white, lobes 

 Bubimbricate, adpresso-adnate (K ) ; hypothallus tomentose, 

 bluish-black. Cromb. Grevillea, xviii. p. 44. Amphiloma lanugi- 

 nosum Mudd, Man. p. 126 ; Cromb. Lich. Brit. p. 44 ; Leight. Lich. 

 Fl. p. 170, ed. 3, p. 156. Squamaria lanuginosa Sm. Eng. Fl. v. 

 p. 53. Parmelia lanuginosa Hook. Fl. Scot. ii. p. 53 ; Gray, Nat. 

 Arr. i. p. 439 ; Tayl. in Mack. Fl. Hib. ii. p. 148. Lichen lanugi- 

 nosus Ach. Prodr. (1798) p. 120. Lichen membmnaceas Dicks. Crypt, 

 fasc. ii. p. 21, t. 6.'f. 1 ; With. Arr. iv. p. 61. Brit. Exs.: Leight. 

 n. 55 ; Larb. Lich. Hb. n. 332. 



'The thallus, which is moderate, or at times somewhat expanded, is 

 occasionally granuloso-pulverulent almost throughout, so that the lobes 

 are nearly obliterated. It is never seen except sterile, though apothecia 

 have been described both by Dickson and Acharius; by the former as 

 being " few, minute, pale-yellow," and by the latter as " minute, reddish, 

 with pulverulent margin." Apart from the discrepancy as to colour, these 

 evidently were not the true fructification. 



Hob. On decayed mosses on shaded rocks, chiefly granitic and schistose, 

 in maritime and upland situations. Distr. General and not uncommon 

 in the mountainous tracts of Great Britain and probably also of Ireland ; 

 rare in the Channel Islands.- B. M. : Rozel, Island of Jersey ; Island of 

 Guernsey. Lustleigh Cleeve, S. Devun ; Roche Rock, Cornwall ; Bardon 

 Hill, Leicestershire ; Malvern, Worcestershire ; Longmynd Hill and 

 Stiperstones, Shropshire ; Barmouth, Merionethshire ; Falcon Clints, 

 Durham ; Kentmere, Westmoreland ; Wastdale, Cumberland. Black 

 Craig, New Galloway, Kirkcudbrightshire; Ben Lomond, Dumbarton- 

 shire ; Achrosagan Hill, Appin ; The Trossachs and Craig Calliach, Perth- 

 shire ; Canlochan, Forfarshire; Craig Cluny, Braemar, Aberdeenshire; 

 Glen Nevis, Inverness-shire ; near Lairg, Sutherlandshire. Bonane, near 

 Dunkerron, co. Kerry. 



60. LECANOEA Ach. Lich. Univ. (1810) p. 77; Nyl. emend. Not. 

 Sallsk. pro F. et Fl. F. Forh. v. (1866) p. 125. Thallus radiato- 

 laciniate, squamulose, granulose, rarely leprose or evanescent. Apo- 

 thecia lecanorine, occasionally biatoroid ; spores usually 8nae, 

 seldom numerous, ellipsoid or oblong, rarely fusiform, simple or 

 sometimes locular or septate, usually colourless ; hymenial gelatine 

 variously tinged with iodine. Spermogones with jointed, rarely 

 simple sterigraata and various spermatia. 



