STEREOCAULON.] STEREOCAULEI. 119 



Distr. General and coumion iu W. and X. England, N. Wales, among 

 the Grampians, Scotland, and in A\'. Ireland. — B. M. : Hay Tor, Widdi- 

 combe, and Wistmaiu's Wood, Uovonshire : Plynlimmou, Cardiganshire ; 

 Cader Idri.«, Llyn Bodlyn, Dolgelly, and Garth, Meriouethshke ; Tee— 

 dale, Durham. New Galloway, Kirkcudbrightshire; Appin, Argyle- 

 shire; Crianlarich, Ben La\vers,'aud near Loch Eagh, Raunoch, Pei-tli- 

 shire ; Glen Callater, Braemar, Aberdeenshire ; Loch Linnhe, Inverness- 

 shire ; near Forres, Elginslm-e ; Applecross, Ross-shire. Cahir and 

 Blaclvwater Bridge, co. Kerry ; Connemara, co. Galway. 



5. S. tomentosum Fr. Sched. Cril:. iii. (182-t) p. 2u pro parte; 

 Fr. fil. Comm. Ster, (1>57) p. 29. — Thallus moderate or somewhat 

 large ; podetia solitary or loosely coespitose, depressed or ascending, 

 rounded, the axis densely tomentoso-arachnoid, divaricately branched, 

 the branches often subdistichous ; podetial granules scarcely auv 

 below, crowded above, ineiso-crenate, rounded, greenish- white or 

 caesio-greenish. Apothecia small, terminal and lateral, concave, 

 becoming subglobose, brown or dark-brown ; spores 3-, rarely 5-7- 

 septate, fusiformi-bacillar, 0,022-37 mm. long, 0,002-3 mm. thick. 

 — ^udd, Man. p. 65 ; Cromb. Lich. Brit. p. 17; Leight. Lich. Fl. 

 p, 87, ed. 3, p. 70. — Brit. Exs. : Dicks. Hort. Sic. n. 24. 



The podetia, usually somewhat robust, are loosely affixed to the sub- 

 stratum or subfree. The tomentum, by which the plant may generally 

 at once be recognized, becomes rnDre or less evanescent in age. The 

 cephalodia are minute, verrucoso-glomerulose, greyish, sometimes serugi- 

 nose, with the gonimia minute, conglomerate, and for the most part 

 moniliform. The apothecia are rather rare in this country, but the 

 spermogones are more common, with spermatia 0,005-6 mm. long, 0,001 

 mm. thick. 



Hab. Amongst gravel in stony places in maritime and subalpine dis- 

 tricts. — Distr. Local and scarce in S., W.,and X. England, the E. coast of 

 Scotland, and here and there among the Grampians. — B. M. : DartmoL-r, 

 Devonshire ; Helvellyn, Cumberland. Ben Lawers, Perthshire ; Sands 

 of Ban-ie and Clova Mts., Forfarshire ; Glen Lui Beg, Braemar, Aber- 

 deenshire ; Ben Xe^is, Inverness-shire. 



6. S. alpiimm Laur. in Fries, Lich. Eur, (1831) p. 204. — 

 Thallus somewhat small ; podetia congested, adherent at the base, 

 erect, the axis thinly tomentose ; podetial granules v\-hitish, verru- 

 coeform and conglomerate, or the lower ones squamulose and ineiso- 

 crenate. Apothecia few, usually terminal and dilated, somewhat 

 plane or at length convex, dark-red or brovniish-black ; spores as in 

 the preceding. — Cromb. Grevillea, xv. p. 15. — Stereocaidon tomen- 

 tostnn var. aljpinum Cromb. Lich. Brit. p. 17 : Leight. Lich. Fl. 

 p. 78, ed. 3, p. 71. Stereocaidon paschdle y. aljpiiuo/i Mudd, Man. 

 p. 66.— 5/-if. Exs. : Larb. Lich. Hb. n. 7. 



Thouo^h regarded as a variety of S. tomentosum, this seems to be a 

 distinct species. The generally small podetia are more erect and con- 

 gested, with their branches less divaricate : the granules are whitish, 

 more turgid and verrucoso-conglomerate : the tomentum, which is whitish 

 and more sparingly present, is at length entirely evanescent ; and the 



