STEREOCAULON, | STEREOCAULEL. 119 
Distr. General and common in W. and N. England, N. Wales, among 
the Grampians, Scotland, and in W. Ireland.—B. M.: Hay Tor, Widdi- 
combe, and Wistmain’s Wood, Devonshire ; Plynlimmon, Cardiganshire ; 
Cader Idris, Llyn Bodlyn, Dolgelly, and Garth, Merionethshire ; Tees- 
dale, Durham, New Galloway, Kirkcudbrightshire; Appin, Argyle- 
shire; Crianlarich, Ben Lawers, aud near Loch Eagh, Rannoch, Perth- 
shire ; Glen Callater, Braemar, Aberdeenshire ; Loch Linnhe, Inverness- 
shire; near Forres, Elginshire; Applecross, Ross-shire, Cahir and 
Blackwater Bridge, co. Kerry; Connemara, co. Galway. 
5. §. tomentosum Fr. Sched. Crit. iii. (182+) p. 20 pro parte; 
Fr. fil. Comm. Ster. (1857) p. 29.—Thallus moderate or somewhat 
large ; podetia solitary or loosely cwspitose, depressed or ascending, 
rounded, the axis densely tomentoso-arachnoid, divaricately branched, 
the branches often subdistichous; podetial granules scarcely any 
below, crowded above, inciso-crenate, rounded, greenish-white or 
cesio-greonish. 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. 
—Mnudd, Man. p. 65; Cromb. Lich. Brit. p. 17; Leight. Lich. Fl. 
p- 87, ed. 3, p. 70.—Brit. Evs.: 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 more 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 8., W., and N. England, the E. coast of 
Scotland, and here and there among the Grampians.—B. M.: Dartmoor, 
Devonshire ; Helvellyn, Cumberland. Ben Lawers, Perthshire ; Sands 
of Barrie and Clova Mts., Forfarshire; Glen Lui Beg, Braemar, Aber- 
deenshire; Ben Nevis, Inverness-shire. 
6. §. alpinum Laur. in Fries, Lich. Eur. (1831) p. 204.— 
Thallus somewhat small; podetia congested, adherent at the base, 
erect, the axis thinly tomentose ; podetial granules whitish, verru- 
ceeform and conglomerate, or the lower ones squamulose and inciso- 
crenate. Apothecia few, usually terminal and dilated, somewhat 
plane or at length convex, dark-red or brownish-black ; spores as in 
the preceding.—Cromb. Grevillea, xv. p. 15.—-Stereocaulon tomen- 
tosum var. alpinum Cromb. Lich. Brit. p. 17; Leight. Lich. Fl. 
p. 78, ed. 3, p. 71. Stereocaulon paschale y. alpinum Mudd, Man. 
p. 66.—Brit. Ews.: Larb. Lich. Hb. n. 7. 
Though 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 
