STEREOCAULON | CLADONIACE® 409 
cap-shaped (pileate), plane then convex, brown or reddish-brown ; 
spores 3-septate, narrowly ellipsoid, obtuse at the ends, 18-30 p 
long, 4—5 p thick.—Cromb. in Grevillea xv. p. 15 (1886) & 
Monogr. i. p. 122. St. cereolus Borr. in Engl. Bot. Suppl. t. 
2667 (1830) deser. pro parte; Hook. in Sm. Engl. Fl. v. p. 233 
pro parte. St. cereolinum Koerb. Syst. Lich. Germ. p. 14 (1855) ; 
Mudd Man. p. 67. St. condensatum var. cereolinum Cromb. Lich. 
Brit. p. 17 pro parte; Leight. Lich. Fl. p. 79; ed. 3, p. 72. 
Ezsicc. Larb. Lich. Hb. n. 6 
Closely allied to the preceding but differs in the larger podetia 
and in the coralline structure of the basal squamules. Th. Fries 
(Lich. Scand. p. 52) describes the cephalodia as occurring towards the 
base of the podetia. In British specimens they occur on the thallus 
as in the previous species. 
Hab. On rocks in subalpine districts.—Distr. Rare and local in 
N. Wales, N. England, S.W. Scotland, the W. Highlands and 
N.W. Ireland.—B. M. Cader Idris and Dolgelly, Merioneth; Wast- 
dale, Cumberland ; New Galloway, Kirkcudbrightshire; Ben Cruachan, 
Argyll; Glen Ogle and Glen Lochay, Perthshire ; Connemara, Galway. 
3. St. nanum Ach. Meth. Lich. p. 315 (1803).—Primary 
thallus effuse, granular, powdery, the granules small whitish or 
bluish-green. Podetia crowded, slender, rather short, obsoletely 
arachnoid, simple or sparingly fastigiately branched towards the 
apices (K—). Apothecia and spermogones unknown —S. F. 
Gray Nat. Arr. i. p. 411; Mudd Man. p. 67; Cromb. Lich. 
Brit. p. 17 ; Leight. Lich. Fl. p. 80; ed. 3, p. 73. Lichen nanus 
Ach. Lich. Suec. Prodr. p. 206 (1798). Leprocaulon nanum Nyl. 
ex Lamy in Bull. Soc. Bot. Fr. xxv. p. 352 (1878); Cromb. in 
Grevillea xv. p. 15 (1836) & Monogr. i. p. 123. 
Exsicc. Larb. Lich. Hb. n. 284. 
Frequently placed in a separate genus Leprocaulon on account 
of the leprarioid structure; it agrees with Stereocaulon in the two- 
fold thallus and in the squamulose podetia. Th. Fries (Monogr. 
Ster. & Pil. p. 65 (1858) ) describes cephalodia as “‘ conglomerate, plane, 
smooth, black”; there are none present on the British specimens. 
Hab. In crevices of rocks and walls in maritime and mountainous 
districts—Distr. Local, though plentiful where it occurs, throughout 
the British Islands.—B. M. Boulay Bay, Jersey; Guernsey ; Lamorna 
and Helmen Tor, Cornwall; Loddiswell, Cawsand Bay, near Kings- 
bridge and Totnes, Devon; near Alfrick, Knightswick and Worcester 
Beacon, Malvern Hills, Worcestershire ; Oswestry and Llanymynech, 
Shropshire; Bettws-y-Coed, Carnarvonshire; Teesdale, Durham; 
Balmerino and Westwater, Fife; Glen Lochay, Perthshire; Den of 
Balthayock and Reeky Linn, Forfarshire; Falls of Lui, Braemar, 
Aberdeenshire ; Learmont, Derry. 
Primary thallus evanescent. 
4, §t. coralloides Fr. Sched. Crit. iv. p. 24 (1824).—Podetia 
cespitose, erect, branched, the axis glabrous, the podetial 
