Barcaldine, Argylesliire; Glen Lochay, S. of Loch Tay, Killin and
Balthayock Woods, near Perth, Perthshire ; Countesswells Woods near
Aberdeen, and Craig Cluny, Braemar, Aberdeenshire; near Fort William,
Inverness-shire; Lairg, Sutherlandshire ; Applecross, Eoss-shire. Blarney,
C O . Cork ; Dunkerron, co. Keriy.
Form rupestris DC. Fl. F r. ii. (1805) p. 320 ; Nyl. Flora, 1881,
p. 456.—F e rtile verrucæ more or less aggrogato-difform, verrueoso-
areolate ; otherwise as in th e type.—Cromb. Lich. Brit. p. 59 (exol.
s j ' h . ) ; Leight. Lich. Fl. p. 239, od. 3, p. 230.— Pertusaria rupestris
Mudd, Man. p. 272. Var. (3. areolata Mudd (non Clem.), 1. c., is
merely a darker state.— Brit. Eæs. : Mudd, n. 259.
Only a saxicolous condition of the type, from which it scarcely diilers
except in the thallus being usually more verrucose.
Ilab. On rocks iu maritime aud upland distriets.—Distr. Only
sparingly in S. and N. England and the S.AV. Highlands of Scotland.-L
B. M. ; Hastings, Sussex: Ayton, Cleveland, Yorkshire; near AVhitehaven,
Cumherland ; Island of Lismore, Argyleshire ; Aherfoyle,
Perthshire.
Subsp. P. a r e o la ta Nyl. ex Hue, Kev. Bot. 1886, p. 74.—
Thallus thiokish, rimoso-areolate, rugose, shortly and more or less
densely papillate, greyish-white (K ¿ yellow). Apotheoia as in
th e type.—Pertusaria areolata Nyl. Flora, 1881, p. 4 5 6 ; Cromb.
Grevillea, xix. p. .59. Thelotrema pertusum var. areolatum Clem.
E n s. &c. Add. (18Ü7) p. 300.
Often confounded with the preceding form, but differs in the character
of the thallus and in the reactions. As Nylander says, it may be a
distinct species. In the British specimens only a few scattered apotliecia,
not well developed, are present.
Hab. On rocks and walls, schistose and arenaceous, in moimtainous
districts.—Distr. Local among the Grampians and in the N.AV. Highlands
of Scotland.—B. M. : Craig Calliach and Craig Tulloch, Blair Athole,
Perthshire ; Morrone, Braemar, Aberdeenshire ; Hills of Applecross,
Koss-shire.
14. P. dealhata Nyl. ex Cromb. Lioh. Brit. (1870) p. 59 (excl.
syn. P. lactescens) ; Elora, 1880, p. 390.—Thallus subindetermi-
na te , granuloso-unequal or papillose, rimose or diffract, thiokish or
somewhat th in , whitish or greyish-white (K + yellow, CaCl — ,
I ]? blue)' i" globulose, pulverulent verruoæ ; epithecium
d ark or sordid-glaucous, somewhat plane, suffused ; spores 2iiæ,
0 ,0 8 0 -1 5 mm. long, 0 ,0 5 0 -8 2 mm. thiok.—Cromb. Grevillea, xii.
p. 57 ; Leight. Lich. El. p. 238, e t ed. 3, p. 228 pro pa rte .—P.
syncarpa et (3. dealhata Mudd, Man. p. 273. Lichen dealbatus Aoh.
Prodr. (1798) p. 29. Variolaria chloroihecia Tayl. in Maok. El.
H ib. ii. p. 114. Isidium jmradoxum Turn. & Borr. Lich. Ilr.
p. 97 ; Sm. Eng. F l. v. p. 231. Variolaria corallina Gray, Nat.
Arr. i. p. 492 ; T a ji. in Mack. F l. Hib. ii. p. 113.—B r it. Exs. :
Leight. I I . 320 ; Mudd, n. 261.
thfokLs! Tt «xteuMvely and is oocasionally of considerable
onhrin, f ■ 11 ? ? with short, simple, conm
Z Z t Z T t e ? fractured into rugose areolæ.
H c Z f Tt g-eiierally aggregate, becoming irreeularly
the h o s t of tV frequently sterile, and is then at times
foini parasitic Spiloma sphcerale Aeh., which occurs also ou the
reofons T®"Mers, and walls in maritime and mountainous
re ions. I k s t , . Apparently general and common in Great Britain and
Ireland; rare m the Channel Is la n d s .-B . M. : Island of S a il C tm o o r
A u s tJ , Cornwall ; Malvern Hills, Worcestershire ;
Barmouth, Aberdovey, and Cwm Byohan, Merionethshire ; Island of
Z v e S ^ Shropshire ; Kildale Moor,
Cleveland, Yorkshire ; T j s J l e , Durham. Ben Cruachan, Argyleshire ;
The T r o j j h s , Cmnlanch, Ben Lawers, and Craig Oalliach, P to h sh ire •
¿ h e ¿ 1 r ^ PorfarsMre ; Glen Callater, Braemar, Aberdeen!
¿ o T n e m a î t T Z r y Oliver,
Form corallina Cromb. Grevillea, xii. (1883) p. 59.—Thallus
thick densely papillose; th e papillæ elongate, th in , simple and
branched. P. synearpa y. coralhnum Mudd, Man. p. 273 Isid ium
corcMinum Gray Nat. Arr. i. p. 412 : Turn. & Borr. Lioh.' Br.
p. 1 0 0 ; Hook. F l Scot. 11. p. 66 ; Sm. Eng. Fl. v. p. 231. Lichen
coralhnus Lm n . Mant. (1767) p. 131 ; Huds. El. Augl. ed. 2, p. 526 :
I S L f t n S i / i- “ 1”
Differs from the type in the character of the isidioid papillæ. I t is
however, c j j c t J with it by intermediate states, so th at perhaps it i?
to be regarded only as a luxuriant condition. I t is never seen fertile.
iV J . On rooks in maritime and upland situations.-Disfr. Seen iu
a t j i c a l state only from a few localities in Great Britain and Ireland
—B. M. : near 1 out-ned-yeclian, Breclmocksliire ; Barmouth, Merio-
nethsfore ; Island of J ig le s e a ; Ayton Moor, Cleveland, Yorkshire •
Eglestone, Durham; Alston, Cumberland. Ben-y-gloe, Perthshire-
Baldovan AVoods, Forfarshire. The Dargle River, co. Wicklow. ’
16. P. ceuthocarpa Turn. & Borr. Lich. Br. (1839) p 200 •
Nyl Mem. Soo. Cherb. t. v. p. 1 1 6 . - Thallus determinate, thickish’
areolato-diffract, oream-colourod ; th e areolæ convex, undiilato-’
rugose (K + yellow, then deep o ra n g e -re d ).-A p o th e c ia few, in sub-
globose, smooth, ^ conglomerate verrucæ ; th e ostioles minute
punotiform, b lack ish ; spores 2næ, 0 ,1 5 0 -1 7 0 mm Ion» 0 057?
60 mm. thick.—Sm. Eng. El. v. p. 1 6 0 : Mudd, M a n .’p . ’271 ■
Cromb Lich. Brit. p. 58 ; Leight. Angio. Lioh. p. 28, t. 9. f. 4 ’•
if® i' — Borina ceuthocarpa Tayl. in
Mack. F l. Hib. ii. p. 102. Lichen ceuthocarpus%m.. E n ^ Bot x x x iii
(1812) t. 2 3 1 2 .-B r i t . Exs. : Leight. n. 284.
^ Appare J l y an endemic species well distinguished by the characters
given, ih e areolæ are at times plane, especially towards the circuru-
ierence, where the plant is limited hy a dark-olive hypothalline margin.