70 COLLEMACEI. [lEPTOGITJM. 



p. 47 ; Cromb. Lich. Brit. p. 8 ; Leight. Lich. Fl. p. 32, ed. 3, p. 28. 

 — Collemal acerum Hook. PI. Scot. ii. p. 72 ; Sm. Eng. Fl. v. p. 213 ; 

 Tayl. iu Mack. Fl. Hib. ii. p. 111. Lichen lacerus Sw. in Ach. 

 Prodr. (1798) p. 113. Lichen lacer Eng. Bot. t. 1982. Lichen tre- 

 mella With. Arr. ed. 3, iv. p. 72. Lichen tremelloides Lightf. Fl. 

 Scot. ii. p. 842 ; Huds. Fl. Angl. ed. 2, p. 537. Lichenoides pellu- 

 cidum, endivice foliis tenuibus Crispin Dill. Muse. 143, t. 19. f. 31 a, b. 

 Lichenoides saxatile teniie rufescens Dill, iu Ray, Syn. ed. 3, 77. 89. 

 — Brit. Exs. : Mudd, n. 5, pro parte ; Larb. Caesar, n. 4. 



Easily recognized by the tballus and lacinife. The thaUus is more or 

 less effuse, often interrupted by fresh growths of the living musses upon 

 which it is developed ; in a moist condition- it is very delicate and sub- 

 peUucid. The apothecia, which are rather rare in British specimens, are 

 sparingly and irregulaily scattered. 



Hab. Among mosses on the gi-ound and old walls in shady places in 

 maritime and upland districts. — Distr. Pretty general, but not very 

 common, in tbe Cbannel Islands and most parts of Great Britain and 

 Ireland. — B. M. : Quenvais, Island of Jersey. Near Cambridge ; Shiere, 

 Surrey ; Ventnor, Isle of Wight ; Buckfastleigh and Murleigh, Devou- 

 shire ; Penzance and near Withiel, Cornwall ; Cheddar Clifl's, Sumerset- 

 shire ; near Cirencester, Gloucestershire; Seddingtou, Bedfordshire; 

 Charnwood Forest, Leicestershire ; Broadwas and Aliric, Worcestershire ; 

 Gam Dingle, Denbighshire ; Cotteral Clough, Lancashire ; near Kendal, 

 "Westmoreland ; Mulgrave Castle, Cleveland, Yorkshii'e ; Keswick, Cum- 

 berland. Near Moffat, Dumfriesshire ; Barcaldine, Argyleshire ; Killin 

 and the Uchills, Perthshire ; Glen Dole, Forfarshire ; Corriemulzie, 

 Braemar, Aberdeenshire ; Lochaber, Inverness-shire. Blarney and Kil- 

 worth, CO. Cork ; KiUarney and Dingle Bay, co. Kerry; Connemara, co. 

 Galway. 



Form fimbriatum Nyl. Syn. i. (1858) p. 122.— Thallus larger; 

 lacinise broader, densely fimbriate and ciliatc at the margins, the 

 cilise very much branched. Apothecia much scattered. — Cromb. 

 Journ. Bot. 1874, p. 335 ; Leigbt. Lich. Fl. Suppl. p. 468, td. 2, 

 p. 28. — Collema Jimbriatum Hoffin. Deutsch. Fl. (1795) p. 104. 

 LicJienoides pellucidiim, endivice foliis tenuibus crispis Dill. Muse. 

 143, t. 19. f. 31 c— Brit. Exs.: Cromb. n. 108; Mudd, n. 5, pro 

 parte. 



From the type this differs chiefly in the densely fimbriato-ciliate 

 margins of the lacinipe, though both states occasionally occur in the same 

 specimen. With us, as elsewhere, it is rarely seen fertile. 



Mdb. Among mosses on rocks and old walls, chiefly in upland tracts. 

 ^Disfr. Seen only in S., W., and N. England, iu iS. Scotland, aud the 

 W. Highlands. — B. M. : Luccombe, Isle of Wight ; near Totuess and 

 Tavistock, Devonshhe : Cheddar Cliffs, Somersetshire ; Chalford and 

 near (Cirencester, Gloucestershire; liroadwas, Worcestershire; Barmouth, 

 Merionethshire ; Cleveland, Yorkshire. New GaUoway, Kirkcudbright- 

 shire ; Barcaldine and Inverary, Argyleshire ; Killin, Perthshire ; S. o f 

 Fort William, Inverness-shire. 



Subsp. 1. L. pulvinatum Xyl. Flora, 1878, p. 345. — Thallus small, 

 pulvinato, dark-brown : lobes minute, much crowded, donticulato- 



