COLLEMODIUAl.] COLLE.MEI. 61 



shire ; Malham Cove, Yorkshire. Bonnington Falls, near Lanark ; near 

 Leven, Fifeshire ; River Isla, near Ruthven Wood and Lochearn, Perth- 

 shire. Ardtully, Kenmare, co. Kerry. 



<J. C. glebulentum Nyl. ex Cromb. Grevillea, xv. (1886) p. 12. 

 Thallus effuse, thickly isidiose, glomuloso- diffract, sublobate, and 

 membranaceous at the circumference, olive-brown or blackish ; lobes 

 very small, subentire or lacerate at the margins. Apothecia and 

 spermogones unknown. Leptoyium ylebulentum Nyl. Cromb. Journ. 

 Bot. 1882, p. 272. 



A peculiar plant externally diverse, but nearly allied to the pre- 

 ceding. The thai] us is rather thin, except where it is covered with the 

 irranuloso-crustose isidia, by which it is almost obliterated, unless at the 

 circumference. Apothecia and spermogones are absent in the few speci- 

 mens seen. 



Hub. On moist limestone rocks in subalpine and alpine localities. 

 Dixfr. In S. and N. Grampians, Scotland, rare. B. M. : Above Loch- 

 na-Gat, Ben Lawers, Perthshire ; Craig Guie, Braemar, Aberdeenshire. 



7. C. turgidum Nyl. ex Lamy, Bull. Soc. Bot. Fr. t. xxv. (1878) 

 p. 342. Thallus thickish, roundly lobed, naked or granulate, dark- 

 olive or reddish-black ; lobes turgid, rugulose, ascending and some- 

 what imbricate in the centre, concave and undulato-plicate at the 

 circumference. Apothecia moderate, urceolate or at length some- 

 what plane, reddish-brown or dark-bro\vn, the thalline margin 

 turgid, more or less granulate: spores oblongo- ovoid, 3-septate and 

 murali-locular, 0,023-32 mm. long, 0,01012 mm. thick. Lepto- 

 to'i'mnt turgidum Nyl. Cromb. Lieh. Brit. p. 10; Leight. Lich. Fl. 

 p.' 28, ei 3, p. 33. Collema turgidum Ach. Lich. Univ. (1810) 

 p. 634 ; Sm. Eng. Fl. v. p. 209 ; Mudd, Man. p. 38. Si-it. Exs. : 

 Leight. n. 257 ; Larb. Lich. Hb. n. 42. 



From all states of Collema jnilposum or Colkmodinm plicatile this is 

 distinguished by the peculiar sublobato-fruticulose thallus, which when 

 dry appears as if minutely verrucfeformi-lobed. The apothecia, which 

 are sessile and normally urceolate, are usually numerous. 



Jfftb. On limestone and brick walls, also on calcareous and cretaceous 

 soil, in upland tracts. Distr. General, though uowhere common, through- 

 out England, rare in the S.W. Highlands of Scotland, not seen from Ire- 

 land. B. M. : Dunwich, Suffolk ; Chelsfield, Kent ; Reigate Hill and 

 Shiere, Surrey ; near Hastings, Sussex ; Shanklin, Isle of Wight ; Ply- 

 mouth, Devonshire ; Wadebridge, Cornwall ; Chew Magna, near Bristol, 

 Somersetshire ; Charneld, Gloucestershire ; Sevenhampton, Wiltshire ; 

 Barrington Hill and Malvern, Worcestershire ; Tetsworth, Oxfordshire ; 

 near Shiffnal, Shropshire. Appin, Argyleshire. 



Var. ft. depression Cromb. Grevillea, xv. (1886) p. 12. Thallus 

 depressed, somewhat rosulate, very small, much scattered. Apothecia 

 minute. 



This peculiar variety evidently depends upon the nature of the habitat, 

 and is probably a starved form of the type. Although the thallus is 

 little developed, the apothecia are rather numerous. 



