A peculiar plant, looking, with its wliite spurious inargin, as if allied
to Lecidea coarctata, but with all the essential characters of this genus.
Superficially it still more resembles L. carneolutea (Turn.), but among
otlier c J r a c te r s J once differs in the simple spores. Nylander observel
{ uch. Scand. P- 197) that there are scanty gonidia towards the base of
tJie apotliecia and th a t their margin consists chiefly of minute crystals of
Z o le t e British specimens the thallus is almost
fv n Z r t “ mountainous regions.—Dfsfr. Seen only
fiom the S.W. Highlands of Scotland aud N. Wales.—B. M ■ Annin
Argyleshire. i u ’
25. P. m q u in a ta F r. fil Bot. Not. 1867, p. 1 0 8 .-T h a llu s snb-
aeterminate, areolato- or verrucoso-rimose, greyish (K —, C a C l- )
Apotheoia innate, one or several in each areola, th e ostioles some?
Hb a t plaue, variously flexuose, and rotundate, the margins irreg u lar
tte n persistent, paler ; spores 0 ,0 2 5 -3 0 mm. long, 0 ,0 1 4 -1 8 mm’
th io k n -L e ig h t. Lich. Fl. e d .3 , p. 2 3 5 ; Cromb. Grevillea, xix.'
4'' Lecanora coarctata S. inquiiiala Aob. Licb. Dniv. (1810)
p. o5o. '
I I (Lich. Scand. p . 311). The microscopical
t * fnU • “ ¿®,"I'°*.T“®‘"> however, show its true place, though, with
sertf ? “i. ®^ respects a connection with tbe Aspicilia
f t’«' fragmentary British specimens, which
thiVl frrifrfe.tfle tballus is tliinmsh, though elsewhere it varies in
thickness, according to the nature of the substratum.
Hab. On rocks in maritime and upland situations.—Dfsfr. Verv local
M a Z ” '®Z“ th « w®I i e l a J and the S.W. Highlands of Scotland.—NBor. tbMu.m ; beBrlaarncda)ld, iWne.
Aigjlesliire. Lettermore, Connemara, co. Galway. ’
26 P. n o l e j Nyl. Flora, 1864, p. 4 8 9 .-T h a llu s determinate,
smooth, areolato-nmose, greyish (K - , CaCl - ) . Apotheoia innate,
n o t promment, two or more approximate, colourless w ith in ; th e
ostioles plane, difform, rotundate or oblong, black, whitish a t the
m a rg in s ; spores 0 ,0 3 0 -4 2 mm. long, 0 ,0 1 5 -2 2 mm. thick —
Carroll, Journ Bot. 1865, p. 2 8 9 ; Cromb. Lioh. Brit. p. 6 1 -
Leight. Lioh. F l. p. 245, ed. 3, p . 235.
_ Probably not specifically distinct from tbe preceding, to which it is
intimately relat J ; though difiering, among some minor characters, in the
b?’ ol>sei7 atioii8 upon the original specimen gathered
by him. Admiral Jones (bat. Hist. Soe. Dublin, May 1864) s a y s “ In
the beginning this plant might be supposed to be ‘ Urceolaria/ but the
Urceolarimi appearance IS of short duration. There are no prominent
w j t s as in Pertusaria, W t the nuclei are in masses, as in this ¡enus, and
TnL ail t l ” ®?"'®®! a white pulverulent ma-gin.
N f “^ ? distric ts.-D isfr. Only yery sparingly in
K.E. and W. I re la n d .-B .M .: Glenarm, co. Antrim; Lou»h iVagh
Connemara, co. Galway. > d“ «agn.
27. P. gyrocheila Nyl. Flora, 1865, p. 354.— Thallus determinate,
subgranuloso-unequal, rimoso-diffract, greyisb (K + yellow,
CaCl —). Apotheoia in thelotremoid tubercles, simple or a t
1 j g t h subgyroso, the tballine margin thiok, subgyrose ; epitheoium
glypholeoeine, hymenium pale ; spores 0 ,0 6 8 -7 0 mm. long 0 0 3 6 -
50 mm. th ic k ; hymenial gelatine and the theoæ b lu is h ’with
iodine.—Carroll, Journ. Bot. 1866, p. 23 ; Cromb. Liob. Brit n 61 •
Leigbt. Lioh. F l. p. 241, ed. 3, p. 232.
A væry distinrt species well characterized by the peculiar form of the
fiuctiticjion. The thallus is small, with the fertile verrucæ more or less
¿OTfog®ferïife specimens gathered are only
ILib. On mica-schist rocks in an alpine situation.—Dikfr. Extremelv
local and scarce on one of the S. Grampians, Scotland.—B. M. ; Summit
ol Ben Lawers, Perthshire.
6. Spores normally 4uæ.
J ' (T823) p. 66 ; Nyl. Lioh. Scand.
p. i b i .— ih a llu s subdeterminate, th in or ra re ly submoderate
smooH or ruguloso-nnoqual,^ milk-white, yellowish-whit?
or whftisb (K — or f + yellowish). Apotbecia in somewhat convex
sm o o tj usually discrete verruoæ, the ostioles solitary or few
(1 -3 -5 ) punctiform, dark ; spores usually 4næ (b u t variable in
number), oblongo-ellipsoid or subellipsoid, 0 ,0 4 2 -7 5 mm Iona-
0 ,0 2 0 -3 8 nim. tb ic k .-M u d d , Man. [ . 2 6 7 ; ’ Cromb. Lich. S
P -2 3 4 .-P o r in a leioplaca
Aoh. Vet. Ak. Handl. 1809, p. 159 ; Licb. Univ. p. 309, t. 771 2
Pertusaria communis var. 2. leioplaca Turn. & Borr. ’uich. Br"
p. 197.—B rit. Exs. Leigbt. n. 230 ; Mudd, nos. 265, 267.
The thallus varies somewhat in thickness, becoming at times subcon-
crescent, wheii the verrucæ are more prominent. As noted by Th. M
Irie s (tech. Scand. p. 316), the chemical reaction varies according to the
TOlour of the thallus being little (or not) distinct when it is dealbate.
ih e apotnecia are also variable, usually solitary, rarely 3 or 5 in the
verrucæ, with the spores at times 3-5-6-8næ, very rarely 2næ (in a
single British specimen). ^ '
Hab. On the trunks of trees iu maritime and upland districts.—Dfsri-
In iiiost parts of Great Britain uo doubt also of Ireland ; not seen from
He Channel Islands.—R M. : Near Highheach, Epping Eorest; Ightham
Kent; St. Leonards Forest, Sussex; Shanklin, Isle of Wight - Kei?
Forest, Ite n ts ; Lustleigh S. Devon; Withiel, Cornwall; near Ciren-
oester Gfoucestershire; Woodbury Hill and Malvern, Worcestershire •
Gopsall Park, Leicestershire; GloddaeH, Carnarvonshire; Bettws-v!
j e d , Denhighshii-e; Island of Anglesea; Newton Wood and Sowerdaie
ClevelaJ,_YOTkshire; Lamplugh, Cumberland. Barcaldine, Argyle!
Hire ; Craig Calliach, Killiu and FaUs of Moness, Aberfeldy, Pei-thsliii-e ■
Moor of Mori-oiie, Braemar, AJrdeenshire ; Glen Nevis, Iiiverness-shire!
Enniskeau, co. CoH ; M Ja i-th y ’s Island and Upper Lake, Killarney, co
Kerry ; Renvyle Wood, Connemara, co. Galway.