Coinnoch, Aforrone, Glen Dee, Braemar ; near Aviemore, and Ben Nevis,
Inverness-shire ; Applecross, Ross-shire. Dunkerron and Caher, co.
Kerry.
Form cæsio -p ru in o sa Nyl. ex Stiz. St. Gall. Nat. Ges. (1876)
p. 206.—Thallus and th e thallino margin of th o apothecia oæsio-
pruinose.—Cromb. Jo u rn . Bot. 1882, p. 272.—subsp. Parmelia
omphalodes f. coesiopruinosa Nyl. ex Norrl. Not. Siillsk. pro F . ot
F l. Fenn. Forh. xiii. (1873) p. 324.
Tliis differs merely in the presence of the cæsions pruina, which,
however, at length becomes more or less obsolete, and the thallus is
sometimes of a bluish tint. The few British specimens yet seeu are
sterile.
Ilab. On rooks in alpine situations.—Distr. Found only on two of the
S. Grampians, Scotlaud.—B. M. : Summits of Craig' Calliach and Ben
Lawers, Perthshire.
Yar. fl. p an n ifo rm is Ach. M eth. (1803) p. 204 pro parte.—Thallus
more or less eft'uso, the laomiæ much narrower, shortly dissected
and imbricate. Apotheoia small or submoderate.—Nyl. ex Stiz. St.
Gall. Nat. Ges. (1876) p. 206 ; Cromh. Grevillea, xv. p. 73.—P a rmelia
saxatilis var. p a n n ifo rm is Cromh. Lioh. Brit. p. 34 ; Leight.
Lich. Fl. p. 130, ed. 3, p. 128.
Forms a densely imbricate and congested crust wliich is somewhat
effuse. I t is usually less shining than the type. The apothecia are
occasionally present, but are not numerous.
Hab. On rocks and boulders in upland and subalpine regions.—Distr.
Not general, though plentiful in S.AV. and AV. England, N. AA’ales, S.
Scotland, and on the Grampians.—B. AI. : Hay Tor, Dartmoor, and Did-
worthy, Devonshire ; near Penzance and Helminton, Cornwall ; Llyn
Gwrionydd, Alerionethshire. Stiperstones Hill, Shropshire. New Galloway,
Kirkcudbrightshire ; Ben Cruachan, Argyleshire; Ben Alore, Ben
Lawers, and Rannoch, Pertlisliire ; Canlocban, Forfarshire ; Alorrone and
Ben-naboord, Braemar, Aberdeenshire ; Ben Nevis, Inverness-shire.
Form 1. glomulifera Cromb. Jo u rn . Bot. 1872, p. 307.—Thallus
with scattered, isidioid, nodulose, dark-brown or blackish
glomeruli.—Leight. Lich. F l. ed. 3, p. 126.
Only var. panniformis with a few glomeruli, suhsimilar in appearance,
though differing in structure, to those of Ricasolia amplissima. These
abnormal growths are probably peculiar to sterile states of the plant.
Hab. On boulders in suhalpine tracts.—Distr. Rare and local on the
mts. of N. AA’ales and the Scottish Grampians.—B. AI. : Cym Idwal,
Carnarvon. Alorrone, Braemar, Aberdeenshire.
Form 2. subconcentrica Cromb. Jo u rn . Bot. 1872, p. 306.—
Thallus panniform, subspherioal, growing involved in concentric
layers.—Leight. Lich. F l. ed. p. 128.
A peculiar state analogous to P. revalut a var. concentrica, though the
few specimens gathered were not so globular. As observed in Journ.
Bot. I. c. it evidently originates from the nodular excrescences on the
thallus of tlie preceding form becoming detached.
Hah. On the ground in alpine situations.—Distr. Found only on one
of the N. Grampians, Scotland.—B. AI. : Alorrone, Braemar, Aberdeenshire.
13. P. Borreri Turn. Trans. Linn. Soo. ix. (1808) p. 148, t. 13.
p. 2.— Thallus suborbicular, oartilagineo-membranaceous, appressed,
imbricato-lobed, rugoso-sorediate, glaucous-grey or pale whitish-
grey ; beneath brownish or pale, subfibrillose, glabrous a t th e oir- .
oumferenoe ; lobes broad, rounded, sinuate, the soredia white-puno-
tiform (K ?] CaCl]] soredia CaCl-|-red). Apothecia
large, badio-reddish, th e margin elevated, inflexed ; spores 0,O H -
15 mm. long, 0 ,0 0 8 -1 1 mm. thick.—Sm. Eng. El. v. p. 199 ; Tayl.
in Mack. El. Hib. ii. p. 147 ; Aludd, Alan. p. 94, t. ii. f. 29 ; Cromb.
Lich. Brit. p. 3 4 ; Leight. Lich. El. p. 133, ed. 3, p. 122.—Lichen
Borreri Eng. Bot. t. 1780. Lichenoides glaucum perlatum, suhtus
n igrum et cirrosum Dill. AIusc. 147, t. 20. f. 39 c. Parmelia red-
denda S tirt. in Scottish N a tu ralist, 1878, p. 298 ; Leight. Lich. Fl.
od. 3, p. 199, is an accidental state, in whioh th e medulla (not th e
soredia) gives no reaction w ith CaCl (cfr. Cromb. Grevillea, 1881,
p. 2 6 ).—B rit. Exs. ; Leight. n. 231 ; Larb. Cæsar. n. 20.
Similar to P. sulcata, from which it is distinguished by the tliicker,
more rigid, smoother, less imbricate, appressed, differently coloured
thallus, aud by the form of the soredia. These appear as numerous, irregularly
scattered, ofteu impressed and pseudo-cyphelloid, whitish
punctate verrucæ, giving it a rough aspect. The thalline reictions, the
smaller spores, and the spermogones render it very distinct. In this
country the apothecia are rare and chiefly central, becoming irregularly
perforate in old age. The spermogones have the spermatia lageniform,
0,0045 mm. long, 0,0010 mm. thick.
Hah. On trunks of old trees, rarely ou rocks, in maritime and upland
wooded distriets.—Distr. General in S. and AV. England ; rare in S.
Scotlaud, S. and S.W. Ireland, and the Channel Islands.—B. AI. ; Rozel,
Island of Jersey; near Jerhourg, Guernsey. Near Bury, Suffolk; AVal-
thamstow, Essex ; Alaidstone, Kent ; near Brighton and Henfield, Sussex ;
Ryde and Slianklin, Isle of AVight ; Basingstoke and Lyndhurst, Hampshire
; near Penzance and Withiel, Cornwall; Kemble, Gloucestershire;
near Oxford and Charlton Camp, Oxfordshire ; Hindlip and Alalvern,
AVorcestershire; Twycross, Leicestershire; Harboro’ Alagna, AVarwickshire
; Barmouth and Dolgelly, Alerionethshire ; Dynevor Castle, Carmarthenshire
; near Kendal, Westmoreland., Near Dumfries; New
Galloway, Kirkcudbrightshire. Riverston, co. Cork ; near Limerick ;
Dunkerron, co. Kerry.
h. Ochroleucoe.—ThaUus normaUy yellowish green, or pale
straw-coloured.
14. P. caperata Ach. Aleth. (1803) p. 216.—Thallus expanded,
imbrioato-lobcd, rugulose, pale yellowish-green or ochroleucous :