Stereocaulon.] LICHENES. 033 



Rocks and stones, in the mountainous districts; and on the Sussex 

 sand-rocks. Borr. 



36. Stereocaulon. Ac/i. Stereocaulon. 



Thallus cartilaginous or somewhat woody, branched and 

 fruticulose. Apothecia turbinate, sessile, solid, plane, scarcely 

 rising above the border, the disk at length spreading-, covering 

 the border and reflexed. — Name; trse-ov, solid and x*«A«$, a 

 stem, by which character it is distinguished from some other 

 fruticulose Lichens. 



1. S. paschdle, Ach. (much-branched Stereocaulon)} tballus 

 greyish branched and .rough with granulated excrescences, 

 branches crowded and very much divided, apothecia scattered 

 and terminal at length convex conglomerate blackish-brown. 



Ach. Syn. p. 284. — Lichen paschcdis, Linn E. Bot. t. 282. — 



Dill. Muse. t. 17. /. 33. 



Rocks and stones, abundant in mountainous countries. 



2. S. botrt/osum, Ach. (clustered Stereocaulon); tballus 

 whitish-grey somewhat naked below above very densely branch- 

 ed, the ultimate branchlets passing gradually into clustered 

 granules ; apothecia collected on the fertile brandies minute dark- 

 brown. Ach. Syn. j). 284. 



Scotland, Afr. Borrer, who observes that it appears to be a dwarfish 

 var. of S. paschale. 



3. S. condyloideum, Ach. (deformed Stereocaulon); tballus 

 whitish nearly naked, the branches short crooked somewhat 

 lobed knotted and granulose, apothecia on the lateral branches 

 at length dilated flat subsessile and appressed red-brown. Ach. 

 Syn. />. 285. 



North of England, Mr. Thornhill. {Doner.) 



4. S. Cereoltis, Ach. Meth. (simple-stalked Stereocaulon); 

 stalks (podetia ?) simple erect without powdery warts rising 



from an uneven granulated crust. Borr Ach. Meth. p. 816. 



/. 7.f. 1. Borr. it, /:. 1U,l Supplt 2667. — S. cereolinum, Ach. 

 Syn. p. 285 — Li</„n Cereolus, Ach. Prodr.p. 89. 



Rocks on Cader-Idris, Rev. T. Salwey and T. ./. Knight, Junr., Esq. 

 Bgleston, Yorkshire, Rev* J. Harriman. Ben Lomond, Mr. Cotton. 



5. s. ndnum, Ach. (dwarf Sten caulon); tballus whitish- 

 grey vnv Blender filiform branched, branches Bubfastigiate floc- 

 eoso-pulverulent, apothecia lateral crowded conve* black-brown. 

 Ach. Syn. p. 285. - Lichen munis. Ach. Prodr. — Baomycee pa$~ 



clialis. o. urn 111111, 11',////. Lapp, p. 450. 



North of England, Rev. J. Harriman and .1//-. Ro6erU<m.—Tbu and 

 S. botryosum and condyloiaeum I have inserted as British od the autho- 

 rity of Mr. Borrer, who remarks thai Wahlenberg lias probably done 

 well in uniting the present species to S. patckaie. Indeed the latt< 

 most variable, as all must scknowledge who have seen it in different 

 situation- upon the mountains. 



