LEPTOGIUM. ] COLLEMEI, 71 
laciniate. Apothecia small, somewhat rare.——Cromb. Journ. Linn. 
Soc., Bot. xvii. p. 567.—Leptogium lacerum B. pulvinatum Mudd, 
Man. p. 47; Cromb. Lich. Brit. p.8; Leight. Lich. Fl. p. 33, ed. 3, 
p. 28. Collema pulvinatum Hoftm. Deutsch. Fl. (1795) p. 104. 
Jachen tremelloides y Lightf. Fl. Scot. ii. p. 842; With. Arr. ed. 3, 
iv. p. 73. Lichenoides tenue crispum, foliis ewiguis surrectis Dill. 
Muse. 146, t. 19. f. 344, et_Lechenoides tenue crispum et veluti 
aculeatum p. 146, t. 19. f£. 35.—Brit. Exs.: Larb. Cesar. n. 55; 
Lich. Hb. n. 241. 
This, which might almost be regarded as a distinct species, is dis- 
tinguished by the minute, crowded, denticulate lacinie ; it forms pulvi- 
nate tufts which are either determinate or somewhat spreading. The 
apothecia, which are seldom seen, are chiefly central. 
Hab. On rocks and old walls, occasionally on the ground, among 
mosses in upland and subalpine tracts —Distr. Frequent in the Channel 
Islands, Great Britain and Teelarid, usually plentiful where it occurs.— 
B. M.: Quenvais, Island of Jersey. Cromer, Norfolk; Epping Forest, 
Fssex ; Shiere, Surrey; Bonchurch 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 Hills, Shropshire; Kildale, Cleveland, Yorkshire; Stavely, 
Westmoreland; Alston, Cumberland. Appin, Argyleshire; Killin and 
Ben Lawers, Perthshire; S. of Fort William, Inverness-shire. Inchi- 
gagoin, co. Cork; near Armagh, co. Antrim. 
Subsp. 2. L. lopheum Nyl. ew Cromb. Grevillea, xv. (1886) p. 13. 
—Thallus very small, pulvinate, greenish-black ; lobes minute, very 
much crowded, ciliato-dissect or ramoso-fimbriate, the branchlets 
cylindrical. Apothecia unknown.—Leptogium lacerum var. lopheum 
Cromb. Lich. Brit. p. 8; Leight. Lich. Fl. p. 34, ed. 3, p. 29. 
Parmelia scotina y. lophea Ach. Meth. (1803) p. 238. 
Probably a distinct species, differing from the preceding subspecies in 
the cylindrical branches and smaller thallus, which is composed of minute, 
irregularly laciniate and ramulose denticulate lobes. ith us, as else- 
where, it is sterile. ; 
Hab. On decaying stumps of old trees in maritime tracts.—Distr. 
Found but sparingly in N. Wales and in the W. Highlands of Scotland. 
—B. M.: Barmouth, Merionethshire. Barcaldine, Argyleshire. 
13. L. scotinum Fr. Sum. Veg. (1846) p. 122; Nyl. Syn. i. 
(1858) p. 123.—Thallus 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. Jong, 0,008-0,016 mm. 
thick—Cromb. Lich. Brit. p., 8, pro parte—Leptogium sinuatum 
Mudd, Man. p. 47, pro parte; Leight. Lich. Fl. p. 37, pro parte, ed. 3, _ 
p- 89, pro parte. Lichen scotinus Ach. Prodr. (1798) p. 128.—Brit. 
Exs.: Mudd, n. 6, pro parte; Cromb. n. 109, pro parte. 
