STEREOCArLON.] STEREOCAULKI. 121 



The sorodiate apices of the podrtia and their brauches distinguish this 

 foi'iu from the type. In the only fertile British specimen seen the ajio- 

 thecia are small and very sparingly present. 



Ilab. On rocks and boulders in subalpine regions. — Distr. Local and 

 scarce, having as yet been found only in N. Wales, among the Gram- 

 pians, and in the X.A\'. Highlands of Scotland, though probably to be 

 detected elsewhere. — E. M. : Cader Idris, Merionethshire. B(>n Lawer.'s, 

 Perthshire ; Braemar, Aberdeenshire : hills of Applecross, Ross-shire. 



/3. pulvinatum Flot. Lich. Sil. (1842) n. 16 y.— Thallus densely 

 piilvinato-ca'spito.se ; podetia short, fastigiately and intricately 

 branched ; podetial granules turgid, nodulose, crowded. Apothecia 

 small, extremely rare. — Cromb. Journ. Bot. 1882, p. 272. — Stereo- 

 caiilon pasdiale e. pulvinatum Schser. Spic. (1883) p. 274. Stereo- 

 canhn tonientosum var. hotryosum Cromb. Lich. Brit. p. 17 ; Leight. 

 Lich. Fl. p. 78, ed. 3, p. 71. Stereomulon jiascJude y. alpimtm 

 var. hotriiosum Mudd, Mau. p. 66. Stereocaulon hotrifosum Sm. Eng. 

 Fl. V. p. 233.— i?/-<7. Kcs. : Leight. n. 387. 



In Herbaria frequently confounded with other species, more especially 

 S. alpinum form bo^rijosum, which apparently does not occur in Britain. 

 It is loosely affixed to the substratum, and the granules are sometimes 

 almost crustaceo-c jnflueut. In this country, as elsewhere, it is very 

 rarely seen fertile. 



Hah. On rocks and boidders in subalpine situations. — Distr. Bather 

 local in N. "Wales, X. England, among the Grampians, Scotland, and in 

 S.W. Ireland. — B. M. : Cader Idris, Merionethshire ; Llyn Howel and 

 Saowdon, Carnarvonshire : Teesdale, Durham. Ben Lawers, Craig Cal- 

 liach, Ben Vrackie, and near Loch Eagh, Rannoch, Perthshire ; Morrone 

 and Ben ^lacdhui, Braemar, Aberdeenshire ; Ben Nevis, Inverness-shire. 

 Connor CliSs, co. Kerry. 



h. Thallus persistent at the base ; podetia subsimple ; cephalodia 

 sessile, glomeruliform or verrucose. 



8. S. condensatum HofFm. Deutsch. Fl. ii.(1795)p. 130.— ThaUus 

 rather small : podetia very short, or almost none, simple or sub- 

 simple, somewhat robust, the axis at first slight]}- arachnoid and 

 then more or less glabrous ; granules squamulose, caespitosely con- 

 gested at the base, scattered on the podetia, creuulate, glaucous or 

 greyish-white. Apothecia moderate, terminal, at length convex, 

 often confluent, brownish or dark reddish-brown : spores 3-7-septate, 

 fusiformi-cylindrical, 0,020-36 mm. long, 0,0015-25 mm. thick. — 

 Mudd, Man. p. 66 ; Cromb. Lich. Brit. p. 17 ; Leight. Lich. Fl. 

 p. 79, ed. 3, p. 71. — Brit. Exs.: Mudd, n. 33; Leight. n. 295. 



The thallus often spreads extensively, forming an efhise, gxanulose 

 crust, and the podetia are often almost entirely wanting. The cephalodia 

 are verrucose, dark-greyish, adnate towards the base of the podetia, the 

 gonimia glomeriilosely arranged. The apothecia sometimes occur also on 

 the basal p-auules, and the spermogones are frequent, with spermatia 

 about 0,00o mm. long, scarcely 0,001 mm. thick. 



Hah. On the ground and on turf-covered walls in maritime, upland, 



