I’ f.
[t. 122 L IC IIEN A C E T . [a lEH EO C A T JLO N .
i; F : ,1
i 1 ;
and subalpino tracts.—Distr. General and common in all the mountainous
regions of Great Britain and Ireland, rare in the Channel Islands.—
B,' M. : La Aloye, Island of .Jersey. Near Jlikleiiliall, Suffolk ; near
Buxton, Derbyshire ; Battersby Moor, CleA’elaud, Yorkshire; Teesdale,
Durham ; Ilousestoads, Nortbumljevlimd. Donne, uear Stirling; Auchtev-
liouse, Forfarsliire ; Aberfeldy and Glen Fender, I’ertbsliire ; I’ortletlien,
Kincardineshire; Craig Guie, Braemar, Aberdeeiisliire. Alangerton, co.
Kerry.
Form condyloideum Nyl. Lioh. Soand. (1861) p. 60.—Thallus
suhmoderate; podetia ra th e r longer,more or less b ran ch ed ,b ran d ie s
shortly ramuloso-dividod a t th e apices.—Cromb. Lich. Brit. p. 17 ;
Leight. Lioh. Fl. p. 80, ed. 3, p. 72.—Stereocaulon ooiuhjloideiim
Aoii. Moth. Suppl. (1803) p. 51 ; Sm. Eng. Fl. v. p. 237.
This differs in being someiyliat larger, with the podetia more frequently
aud distinctly branched. Tho apotbecia, whicli are usually aggregate anil
terminal, are' sometimes also infixed on the subteriniual branchlets.
Ilah. On turf-covered walls iu upland districts.—Distr. Local and
scarce iu N. England aud among the Grampians, Scotland.—B. AI.:
Housesteads, Northumbeiiaud. lien Lawers and Glen Fender, Perthshire.
0. S. pileatum Ach. Lich. Univ. (1810) p. 582 ; F r. fil. Lich.
Soand. p. 51.—Thallus small ; podetia very short, erect, slender,
simple or sometimes sparingly branched, tho axis glabrous ; granules
squamulose or corallino-vorruoaeform, usually conglomerate a t tho
base, scattered on th e podetia, greyish. Apotheoia terminal, pileate,
somewhat plane, a t length slightly convex, b rown or reddish-brown ;
sporos 3-soptate, fusiform, obtuse at either apex, 0 ,0 1 8 -3 0 mm.
long, 0 ,0 0 4 0 -1 5 mm. thick.— Cromh. Grevillea, xv. p. 15.—Stereocaulon
condeiisatum var. eereolinmn Cromh. Lich. Brit. p. 17 pro
p a rte ; Loight. Lioh. Fl. p. 79, ed. 3, p. 72. Stereocaidon eereoUnum
Sm. Eng. Fl. v. p. 233 pro parte : Aludd, Alan. p. 67. Stereocaidon
cereolus Borr. Eng. Bot., Suppl. t. 2667 desor. pro p a rte .—-Brìi.
E.vs. : Larb. Lioh. Hb. n. 6.
From S. condensatum, of which it has been regarded as a variety, this
is distinguisbed bv the short and often nearly naked podetia, aud by the
structure of the apothecia. I t still more closely resembles Pilophorus
cereolus (Acb.), from which, however, it differs in tlie^ spores. The
podetia are closely affixed to the substratum, and are often in_ barren
plants sorediato-capitate at the apices. The ceplialodia, whicli are
situated towards the base of the podetia, are verrucose, olive-brown or
dark-greyisb, w ith the gonimia somewhat large or moderate, glomerulose.
In the British specimens the spermogones are sparingly present.
Hah. On mountainous rooks in subalpine districts.—Distr. Rare and
local in N. AVales, N. England, in S.W. Scotland, the AV. Highlands,
and in N.AA^. Ireland.—B. AI. ; Cader Idris and Dolgelly, Alerionetli-
shire ; Teesdale, Durham ; AVastdale, Cumberland. New Galloway,
Kirkcudbriglitshire ; Ben Cruachan, Argylesliire ; Glen Ample and Glen
Lochay, Perthsliire. Connemara, co. Galway.
L E P R O C A U LO N .] STEREO CA U L E I. 123
30. LEPROCAULON Nyl. ex Lamy, Bull. Soo. Bot. F r. t. xxv.
(1878) p. 352.—Tliallus minute, suhpodetiform, subloproso-granu-
lose, not bearing oephalodia, th e pseudo-podetia cæspitosely congested,
simplish. Apothecia and spermogones unknown.
This pseudo-genus, containing a single species, separated by Nylander
from Stereocaulon, is hut a fruticulescent Lepraria. I t may be placed
here on account of its superficial resemblance to Stereocaulon, to wliicb,
however, it is not even allied {vide Flora, 187C, p. 578).
1. L. n a n um iS'yL ex Lamy, I. o.—Thallus minute, Icproso-granu-
loso a t tho base ; granules very small, glaucous-white or subærugi-
noso ; pseiido-podof.ia very short, slender, filiform, oæspitoso-con-
gcstcd, somowhat simple or sparingly divided towards th e apices,
th e branches often subfastigiate, ohsoletely arachnoid, often glabrous
(K —).—Cromb. Grovillea, xv. p. 15.—Stereocaulon nanum Aoh.
Aleth. (1803) p. 3 1 5 ; Gray, Nat. Arr. i. p. 411 ; Sm. Eng. Fl. v.
p. 233 ; Aludd, Alan. p. 67 ; Cromh. Lich. Brit. p. 17 ; Leight. Lich.
Fl. p. 80, ed. 3, p. 1 3 .—B rit. Exs. ; Larb. Lioh. Hb. n. 284.
“ Stereocaulon nanum is not a Stereocaulon, hvA, so far as I have seen in
nature, only a Lepraria (Leprocaulon). The tliallus is imperfect, and it
has no right to be referred to Stei'eocaidon" (Nylxaiex in Kit.). This
view is confirmed by the absence of the yellow reaction with K, characteristic
of th at genus.
Hab. In crevices of rocks aud walls in maritime and mountainous districts.—
Distr. Local, though plentiful where it occurs, in the Channel
Islands, N. AVales, AV. and N. England, amongst the Grampians, Scotland,
and rare in N.AV. Ireland.—B. AI. : Boulay Bay, Island of Jersey ;
Island of Guernsey. Near Kingsbridge and Totness, Devonshire ; La-
inorna and Ilelmintou, Cornwall : uear Alfrick, Worcestershire ; Oswestry,
Shropshire ; Bettws-y-Coed, Carnarvonshire ; Aberdovey, Alerionetli-
sbire ; Teesdale, Durliain. Barcaldine, Argyleshire ; Balmerino, Fifeshire
; Glen Lochay, Perthshire ; Den of Balthayock and Reeky Linn,
Forfarshire ; Falls of Lui, Braemar, Aberdeenshire. Learmont, co. Derry.
Tribe VI. C L A D O N I E I Nyl. Alem. Soo. Cherb. ii.
(1854) p. 11 ; Syn. i. (1860) p. 186.
Thallus foliose, fruticulose or cæspitose, erect or ascending, consisting
of fistuloso or suhflstulose podetia, with usually a gonidial-
cortioal layer, and generally also of horizontal leaflets or squamules
a t th e base, sometimes also on the podetia, containing gonidia
and corticate only, above, or very raroly of crustaceous basal g ra nules
; medullary layer formed principally of filamentose agglutin
a te longitudinal elements. Apotheoia cephalodine or biatorine,
typically terminal on tho podetia, rarely affixed to th e leaflets, often
aggregate ( “ symphioarpous ”), variously coloured (not black) ; spores
8uæ, simple, oblong, small, colourless ; paraphyses somowhat short,
occasionally bifurcate. Spermogones generally protuberant on the
podetia ; sterigmata slender, simple or sparingly branched.
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