LEPTOQirM.] COLLEMEI. 71 



laciniate. Apothccia small, somewhat rare. — Cromb. Journ. Linn. 

 Soc, Bot. xvii. p. 567. — Leptogium laceyion fi. j^itJvinaitim 'Slndd, 

 "Man. \). 47 ; Cromb. Lich. Brit. p. 8 ; Lcight. Licb. Fl. ]>. 83, ed, cJ, 

 p. 2b. CoUema indrinatum Hoffm. IJeutscb. fl. (17')5) p. 104. 

 Lichen tremeJloidcs y Lightf. Fl. fcfcot. ii. p. 842; AVilh. Arr. ed. 3, 

 iv. p. 73. Lichenoides tenue crispum, foliis exifjuis svrrtctis Dill. 

 Muse. 146, t. I'J. f. 34 a, et Lichenoides tenue crispum et vehUi 

 acideatum p. 146, t. 19. f. 35. — Brit. Kvs, : Larb. Caesar, n. 55 ; 

 Licb. Hb. n. 241. 



This, which might almost b? regarded as a distinct species, is dis- 

 tinguished by the minute, crowded, denticulate lacinite ; it forms pulvi- 

 nate tufts which are either determinate or somewhat spreading. The 

 apothecia, which are seldom seen, are chiefly central. 



Hub. On rocks and old walls, occasionally on the groimd, among 

 mosses in upland and subalpine tracts. — Distr. Frequent in the Channel 

 Islands, Great Britain and Ireland, usually plentiful where it occurs. — 

 B. M. : Queuvais, Island of Jersey. Cromer, Norfolk ; Epping Forest, 

 J'^^sex ; Shiere, SuiTey ; Bnnchurch and Luccombe, Isle of Wight ; near 

 Plymouth, Devonshire ; Bathampton Downs, Somersetshire ; Chalford 

 and near Cirencester, Gloucestershire ; Malvern Hills, Broadwas, and 

 Alfric, Worcestershire ; Twycross, Leicestershire ; Aberdovey, Merioneth- 

 shire ; Clee HiUs, Shropshire ; Kildale, Cleveland, A'orksliire ; Stavely, 

 Westmoreland ; Alston, Cumberland. Appin, Argyleshire ; Killin and 

 Ben Lawers, Perthshire ; S. of Fort WiiUam, Inverness-shire. Inchi- 

 gaggin, CO. Cork ; near Arn:agh, co. Antrim. 



Siibsp. 2. L. lophaeum Xyl. ^.r Cromb. Grevillea, xv. (1886) p. 13. 

 — Tballus very small, pulvinate, greenish-black : lobes minute, very 

 much crowded, ciliato-dissect or ramoso-fiml)riate, the braucblets 

 cylindrical. Apothecia unknown. — Lep>toijium lac^mmxax.lophrum 

 Cromb. Licb. Brit. p. 8; Leight. Lich. Fl. p. 34, ed. 3, p. 29, 

 Paiinelia scotina y. lophaa Ach. Meth. (1803) p. 238. 



Probably a distinct species, differing from the preceding subspecies in 

 the cylindrical branches and smaller thaUus, which is composed of minute, 

 irregularly laciniate and ramulose denticulate lobes. With us, as else- 

 where, it is sterile. 



Hab. On decaying stumps of old trees in maritime tracts. — Distr. 

 Found but sparingly in X. Wales and in the AV. Highlands of Scotland. 

 — B. M. : Barmouth, Merionethshire. Barcaldine, Argyleshire. 



13. L. scotinum Fr. Sum. Teg. (1846) p. 122; Xyl. Syn. i. 

 (1858) p. 123. — ThaUus laciniato-lobed, plicate, reticulato-rugulose, 

 dark glaucous-green or brownish lead-coloured ; lobes rounded, some- 

 what crowded, suberect and entire at the margins. Apothecia small, 

 concave, brownish-red, the margin smooth, elevated : spores ovoid, 

 irregularly murali-locular, 0,024—41 mm. long. 0,008-0,016 mm. 

 thick. — Cromb. Lich. Brit, p., 8, pro parte. — Lqjtogium sinuatum 

 Mudd, Man. p. 47, pro parte ; Leight. Lich. Fl. p. 37, pro parte, ed. 3, 

 p. 39, pro parte. Lichen scotinus Ach. Prodr. (1798) p. 128. — Brit. 

 Exs. : Mudd. n. 6, pro parte : Cromb. n. 109, pro parte. 



