48 COLLEJIACEI. [COLLE.MA. 



0,016-24 mm. long, 0,007-11 mm. thick. Borr. in Eng. Bot, Suppl. 

 t. 2716. f. 1 ; Sm. Eng. Fl. v. p. 212 Tayl. in Mack. Fl. Hib. 

 ii. p. 110 ; Mudd, Man. p. 40 ; Croinb. Lich. Brit. p. 4 ; Leight. 

 Lich. Fl. p. 21, cd. 3, p. 19. Lichen crispus Ach. Prodr. (1798) 

 p. 126. Lichen crispits of our older authors belongs to G. cheikum. 

 Brit. Exs. : Leight. n. 106 ; Mudd, n. 2. 



This is allied to C. pulposum, but differs in the form of the granulate 

 lobes, and especially in the crenato-granulate thalJme margin of the 

 apothecia. From C. cheileum, which in fructification it closely resembles, 

 it is distinguished by the central lobes being more developed, erect and 

 aggregate. The apothecia are usually central, generally crowded, and 

 sometimes large. 



Hob. Among mosses on gravelly soil, and the tops of old walls, 

 chiefly in upland districts. Distr. Local and scarce, at least in a fertile 

 condition, in the Channel Islands, Great Britain and Ireland. B. M. : 

 Shores of the Island of Herm. The Downs, Sussex ; St. Lawrence and 

 Sandown, Isle of Wight ; near Torquay, S. Devon ; St. Minver, Corn- 

 wall ; Windsor Great Park, Berkshire ; Coatham Marshes, Cleveland, 

 Yorkshire. Appin, Argyleshire ; Craig Tulloch, Blair Athole, Perthshire. 

 Killarney and Dunkerron, co. Kerry. 



Subsp. C. ceranoides Nyl. ex Cromb. Grevillea, xv. (1886) p. 12. 

 Lobes in the centre imbricate, ascending, dilated upwards, some- 

 what proliferous, fastigiate. Apothecia with subentire or granulate 

 margin ; spores 3-septate, 0,017-25 mm. long, 0,008-9 mm. thick. 

 Collenia pulposum var. ceranoides Cromb. Journ. Bot. 1874, 

 p. 333 ; Leight. Lich. Fl. ed. 3, p. 18. Cottema ceranoides Borr. in 

 Eng. Bot. Suppl. (1831) t. 2704. f. 2 ; Sm. Eng. Fl. v. p. 209 ; 

 Mudd, Man. p. 41 pro parte ; Cromb. Lich. Brit. p. 6 ; Leight. 

 Lich. Fl. p. 23. 



Having regard merely to the imperfect portion of the plant figured in 

 E. B. Suppl., this might be taken for a well-marked species. More 

 perfect specimens, however, in which the lobes at the circumference are 

 depressed and more typical, show that it is to be viewed rather as a sub- 

 species of C. crispum, well distinguished by the thallus and apothecia. 

 It is usually seen only in a sterile condition. 



Hob. On cretaceous and calcareous soil, sometimes on shell-sand, in 

 maritime and upland tracts. Distr. Rather local and scarce, in the 

 Channel Islands, and S. and W. England. B. M. : Island of Herm. 

 Henham, Essex ; Shiere, Surrey ; The Downs, Halmaker, and Rotting- 

 dean Cliffs, Sussex ; Babbicombe Downs, Devonshire ; St. Minver and 

 near Penzance, Cornwall ; Bathampton Downs, Somersetshire ; near 

 Cirencester, Gloucestershire ; Malveru, Worcestershire. 



Form cristatulum Nyl. ex Cromb. Journ. Bot. 1874, p. 334. 

 Thallus microphylline, lobes crowdedly granulato-crenate. Apothecia 

 small ; spores 0,016-21 mm. long, 0,007-9 mm. thick. Leight 

 Lich. Fl. Suppl. p. 468, ed. 3, p. 20. 



This is a smaller and less developed state of C. ceranoides, from which 

 probably it ought not to be distinguished. As in the type, the apothecia 

 are but sparingly present. 



