apothecia. Like Pannularia, it might almost be incUided among the
Zeciileei (ride Nvl. and Cromb. Journ. Linn. Soc. Bot. xx. p. 51); but its
more appropriate place is in this subtrihe. I t comprises only a few
species, which, with a single exception, are natives of warm regions.
1. C. p lum b e a Nyl. Mom. Soo. Cherb. v. (1857) p. 109 ; Lich.
Scand. p. 128.—ïh a llu s orbicular, coriaceo-membranaceous, submonophyllous,
adnato, radiato-incised aud radiately plicato-rugose
a t th e circumference, tho margins broadly expanded and crenate,
livid-greyish or livid loaden-ooloiired ; hypothallus thiokish, tomentoso,
leaden-bluish. Apotheoia small, plane or convex, reddish-
brown, th e margin thin, entire, p a le r; spores ellipsoid, simple.
Fig. 57.
Coccocarnia phimiea'Syl—a. A theoa and paraphysis, x350. 6. Three spores,
c. Vertical section of two spermogones, X 30. X 5 0 0 . ----------------- d Jointed sterigmata
a n d sp e rm a tia , X 500.
0 ,0 1 6 -3 0 mm. long, 0,0 0 7 -1 1 mm. th ick ; hymenial gelatine bluish
w ith iodine.—Cromb. Lioh. Brit. p. 4 3 — Pannaria plumbea Mudd,
Man. p. 121 ; Leight. Lioh. IT. p. 170, od. 3, p. 154. Placodium
plumbeum Sm. Eng. El. v. p. 197. Parmelia plumbea Hook. FL Soot,
ii. p. 53 ; Gray, Nat. Arr. i. p. 440 ; Tayl. in Mack. El. Hib. ii.
p 142. Lichen plmnbeus Lightf, F l. Scot. ii. (1777) p. 826, t. 26
(lower fig.) ; With. A rr. iv. p. 60 ; Eng. Bot. t. 353. Lichen, cæru-
lesccns Huds. F l. Angl. ed. 2, p. 531. Lichenoides tenue et molle.
Agarici facie Dill. Muso. 179, t. 24. f. 13.— B rit. E xs. : LeighL n.
233 ; Cromb. n. 56 ; Larb. Cæsar. n. 72 pro parte ; Lioh. Hb. n. 253.
A well-marked and easily recognized plant, varying in diameter from
3 to 6 inches, aud occasionally still more expanded. The thallus is oiten
L
concentrically rugulose towards the circumference, is very rarely partly
panniform, and occasionally bears pale rhizinæ on the under surface. The
apothecia are small in proportion to the size of the tliallus, though sometimes
moderate, occasionally having the appearance of being compound,
while rarely they are proliferous, with the margin crenate and inflexed.
Ilab. On the trunks of old trees, seldom on mossy boulders and walls,
iu maritime and upland wooded regions.—Distr. General aud common,
especially in the mountainous tracts of Great Britain and Ireland ; scarce
iu the Channel Islands.—B. M. ; La Coupe, Island of Jersey ; Islands of
Guernsey, Crevichou, and Alderney. Appuldurcombe, Isle of AVight ;
South Brent and Bolt Head, Devonshire ; near Penzauce, Bodmin, Pentirò,
Bocconoc and Respriiig, Cornwall; Cader Idris, and near Barmouth,
Merionethshire ; Aber, Carnarvonshire ; Bettws-y-Coed, Denbighshire ;
Eglestone, Durham ; Keswick and Ennerdale Lake, Cumberland. New
Galloway, Kirkcudbrightsliire ; Barcaldine, Appin, and Head of Loch
Awe, Argylesliire ; Glen Falloch, Glen Lochay, and Killin, Perthshire ;
Clova, Forfarshire ; Craig Coinnoch, Braemar, Aberdeensliire ; S. of Fort
William, Inverness-shire; Applecross, Ross-shire. Cromaglown and
Blackwater Bridge, co. Kerry ; Connemara, co. Galway.
Var. ft. m y rio c a rp a Nyl. Lioh. Scand. (1861) p. 128.—Thallus
miorophyUine or grauulose iu the centre. Apotheoia ra th e r small,
numerous, often margined by the granulose thallus.—Cromb. Lioh.
Brit. p. 43.—Pannaria plumbea ft. myriocarpa Mudd, Man. p. 1 2 2 ;
Leight. Lich. Fl. ed. 3, p. 154. Parmelia plumbea var. myriocarpa
Del. in Dub. Bot. Gall. (1830) p. 606.— B rit. Exs. : Cromb. n. 57 ;
Larb. Cæsar. n. 72 pro parte.
Differs in the smaller, less developed tliallus, which is frequently grauulose
almost throughout, and is thus analogous to var. ft of Pannaria
rubiginosa. The apothecia are usually crowded, and in a young state are
often crowned by greyish thalline granules (form lecanoroidea Cromh.
Grevillea, xviii. p. 44).
Ilab. On the trunks of old trees in maritime and upland wooded regions.—
Distr. Rather local in S.W. aud N. England, N. Wales, the W.
Highlands, and N.E. Scotland ; rare in the Channel Islands and S. Ireland.
—B. M .; Island of Jersey. Throwleigh, Totnes, and near Ilopton, Devonshire
; near Penzance, Cornwall; Bettws-y-Coed, Denbighshire; Island
of Anglesea; Teesdale, Durham; Windermere, Westmoreland. Near
Campsie, Dumbartonshire; Barcaldine, Argyleshire; The Trossacbs,
Aberfeldy, and Killin, Perthshire ; S. of Fort AVilliam, Inverness-shire ;
Cawdor AVoods, Nairn. Deer Park, Castlebernard, co. Cork.
Subtribo I I . L E C A N O R E I Nyl. Flora, 1882, p. 458.
Thallus squamulose, granulose or pulverulent, internally containing
gonidia. Apotheoia typically lecanoriue; spores 8næ, rarely
numerous, simple or variously divided; paraphyses discrete. 'S p e rmogones
usually with jointed sterigmata.
AVell distinguished from the preceding subtrihe by the gonidial layer
consisting of eugonidia. I t is veiy variable in the characters of the thallus
and fructitication, sometimes, in tlie latter respect, passing as it were into
tlie suhtribe of the Lecideei.
I'ii ’
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