COLLEGIA.] COLLEJ1EI. 45 



Devonshire ; Boconnoc, Camelf ord, and St. Minver, Cornwall ; near 

 Worcester and Malvern, Worcestershire ; Barmouth, Dolgelly, and Lyn 

 Gwernan, Merionethshire ; Nant Gwynant, Carnarvonshire ; Rievaulx, 

 Yorkshire ; near Kendal and Windermere, Westmoreland ; Keswick, 

 Cumberland. New Galloway, Kirkcudbrightshire ; King's Park, Edin- 

 burgh ; Barcaldine, Argyleshire ; Killin, Kenmore, Kinnoull Hill, and 

 Craighall, Perthshire ; Den of Glammis, Forfarshire ; Craig Coinnoch, 

 Braemar, Aberdeenshire ; Applecross, Ross-shire. Mallow, co. Cork; 

 Blackwater Bridge, co. Kerry. 



d. Thallus microphylline, variously lobed. 



10. C. pulposum Ach. Syn. (1814) p. 311. Thallus thickish, 

 subimbricato-lobed, olive-brown or dark-greenish ; lobes nearly 

 entire or repando-crenate, often plicate (I + reddish). Apothecia 

 moderate, concave or plane, reddish or dark-red, the margin thick, 

 entire ; spores ovoid, usually 3-septate, or also with longitudinal 

 septules, 0,016-24 mm. long, 0,007-10 mm. thick. Mudd, Man. 

 p. 38 pro p., t. i. f . 3 ; Cromb. Lich. Brit. p. 4 ; Leight. Lich. Fl. 

 p. 18, ed. 3, p. 18. Lichen pulposus Bernh. Schrad. Journ. (1799) 

 i. p. 7, t. 1. f. 1. Lichen crispus Eng. Bot. t. 834. Lichenoides 

 gelatinosum foUis imbricatis et cristatis Dill. Muse. 140, 1. 19. f. 26 c. 

 Brit. Exs. : Cromb. n. 4. 



From alh'ed species this is distinguished by its thick, pulpy thallus, 

 the repand, crenate, and often plicate lobes, and by the entire margin of 

 the apothecia. Frequently seen in a rudimentary nostocine condition, 

 and then not conspicuous unless in wet weather, when the thallus swells 

 considerably. The apothecia are chiefly central, numerous, sometimes 

 becoming confluent, and slightly convex, with thin recurved margin. 



Hab. On the ground and old walls, chiefly calcareous, in maritime and 

 upland districts. Distr. General in the Channel Islands, and in most 

 parts of Great Britain and Ireland. B. M. : St. Saviour's Hill, Island of 

 Guernsey. Reigate Hill, Surrey ; Shoreham, Kent ; Lewes and Hurst- 

 pierpoiut, Sussex ; Uiidercliff and Shanklin, Isle of Wight ; near Ply- 

 mouth and Torquay, Devonshire ; St. Minver, Cornwall ; Preston, Wilt- 

 shire ; Bathampton Downs, Somersetshire; Tetbury and Cirencester, 

 Gloucestershire ; Norton, Worcestershire ; Barmouth, Merionethshire ; 

 Teesdale, Durham ; Kendal, Westmoreland ; near Whitehaven, Cumber- 

 land. Appin, Argyleshire ; Killin, Perthshire. Great Island, co. Cork ; 

 Killarney, co. Kerry. 



Form compactum Nyl. Syn. i. (1858) p. 109. Thalline lobes 

 densely complicato-imbricate, somewhat rugose ; apothecia reddish. 

 Cromb. Journ. Bot. 1874, p. 333 ; Leight. Lich. Fl. ed. 3, p. 18. 

 Collema compactum Ach. Syn. (1814) p. 313. 



The closely imbricate and rougher thallus distinguishes this form, 

 which, however, is connected with the type by intermediate states, de- 

 pending on the nature of the habitat. When fertile, the apothecia are 

 numerous and become darker with age. 



Hab. On the ground in maritime and upland tracts. Distr. Local and 

 scarce in a typical condition, having 'been observed only in W. England 

 and in the S. and W. Highlands, Scotland. B. M. : Kernble, Glouces- 

 tershire ; Malvern, Worcestershire. Island of Lismore, Argyleshire ; 

 Killin, Perthshire, 



