STKRKOCAULON.J SXEREOCAVLKT. 117 



ft. Thallus evanescent at the base : podetia branched ; cephalodia 

 sessile, glomeruliform or verrucose. 



1. S. coralloides Fr. L. Suec. Exs. (1817) n. 118 ; Sched. Grit, 

 iv. p. 24. Thallus somewhat small or usually moderate ; podetia 

 caespitosely united at the base, erect or ascending, branched, the 

 axis glabrous; podetial granules digitately branched or subfibrillose, 

 greyish. Apothecia moderate, terminal and lateral, at length glo- 

 bose and immarginate, brown or dark-reddish ; spores 3- (rarely 

 5-7-) septate, fusiformi-cylindrical, 0,0022-40 mm. long, 0,0025- 

 40 mm. thick. Cromb. Lich. Brit. p. 16 ; Leight. Lich. Fl. p. 77, 

 ed. 3, p. 69. Stereocaulon pascliale /3. corallinum Mudd, Man. p. 65, 

 t. i. f. 14. Stereocaulon paschale Gray, Nat. Arr. i. p. 41 L ; Hook. 

 Fl. Scot. ii. p. 66 ; Sm. Eng. Fl. v. p. 333 ; Tayl. in Mack. Fl. Hib. 

 ii. p. 83 ; Mudd, Man. p. 65 ; Cromb. Lich. Brit. p. 17 pro parte ; 

 Leight. Lich. Fl. p. 77 pro parte. Lichen paschalis Huds. Fl. Angl. 

 p. 460 pro parte ; Lightf. Fl. Scot. ii. p. 886 pro parte ; With. Arr. 

 ed. 3, iv. p. 44 pro parte ; Eng. Bot. t. 282. The above synonyms 

 show that this has been confounded with S. paschale. Brit. Exs. : 

 Leight. n. 148; Cromb. n. 119 ; Bohl. n. 14. 



Readily distinguished by the mode of growth and the form of the 

 elegantly" divided granules' The podetia are very closely adnate to the 

 substratum, and the apothecia are numerous. The cei ' n 



sometimes caesio-greyish, opaque, verrucose, minutely granulate on the 

 surface, with the gonimia in gelatinous nodules. The spermogones are at 

 first simple, afterwards compound, with the spermatia 0,005-6 mm. long, 

 0,001 mm. thick. 



Hub. On rocks, boulders, and old walls in upland and subalpine dis- 

 tricts. Disfr. General and common in the hilly and mountainous tracts 

 of Great Britain, rare in Ireland. B. M. : Dartmoor, Devonshire ; 

 between Arthur's bed and Wring Cheese, and near Helminton, Cornwall ; 

 Black Edge, Buxton, Derbyshire; Abdon Burf and near Oswestry, 

 Shropshire ; Cader Idris and Dolgelly, Merionethshire ; Teesdale, Dur- 

 ham : near Stavely, Kendal, and Ambleside, Westmoreland ; Wastdale, 

 Cumberland. New Galloway, Kirkcudbrightshire; Leadhills, Lanark- 

 shire ; Inverary and Appin, Argyleshire ; Ben Lawers, Blair Athole, and 

 Loch Raunocli, Perthshire; Sidlaw Hills, Balgay Wood, and Glen Isla, 

 Forfarshire ; Craig Nich, Glen Callater, Glen Derrie, and Glen Dee, 

 Braemar, Aberdeenshire ; near Forres, Elginshire ; Ben Nevis and Loch- 

 aber, Inverness-shire ; hills of Applecross, Ross-shire. Killarney, co. 

 Kerry; Connemara, co. Galway. 



2. S. Delisei Bory in Dub. Bot. Gall. ii. (1830) p. 619. Thallus 

 small, podetia loosely ceespitose, branched, the axis thinly arachnoid 

 or often naked : podetial granules situated chiefly towards the 

 apices, crenate or digitately divided, whitish, pulverulento-dissolved, 

 sorediato-conglomerate on the apices. Apothecia unknown. 

 Cromb. Journ. Bot. 1885, p. 195. S. coralloides subsp S. Delisei 

 Xyl. Syn. i. p. 242, t. 7. f. 17. 



The granules at first resemble those of S. coralloides, but at length 

 become pulverulent and sorediite at the apices. Our British specimens, 

 which are without cephalodia, have the podetia scarcely ^ in. high, with 



