’'IT-'
not uncoimiion.—B. M. : Near Grooiubridge, Sussex ; near Stroud and
King’s Stanley, Gloucestershire ; Gopsall, Leicestershire ; Ayton, Ueve-
land? Yorkshire ; Brigsteer, Westmoreland.
13. L. c allo p ism a Ach. Licli. Univ. (1810) p. 437. Ih a llu s
orbicular, closely adnate, smooth, radiato-lobed, bright-yellow, often
A-erv tliiiily wb'ite-suffused ; lobes rimoso-areolate in th e centre,
dilated and nearly plane at tlie circumferenoe (K - f purplish). Apothecia
subsessile, plane or slightly convex, orange-coloured (K -f
p u rp le ); the thalline margin thickish, flexuose or /u b o ren u la te ,
p a le r; spores broadly citriformi-ollipsoid, 0 ,0 0 8 -1 5 mm. loug,
0 0 0 6 -1 0 mm. thick.—Cromb. Grovillea, xviii. p. 4b.— Placodium
calhpismum Mudd, Man. p. 133, t. ii. f. 42 ; Cromb. Enum. p. 45 ;
Leight. Liob. Kl. p. 176,ed. 3, p. 162. Lichen murorum Eug. Bot.
t. 2157 (upper fig.). Lichen candelarius ft. Lightf. ? Fl. Soot. ii. p. 811.
Lichenoides crustosum, orhicuUs et scutellis jia v is Dill. Muso. 236,
t. 18. f. 18 A, C.—B rit. E x s .: Leight. n. 113 ; Larb. Lioh. Hb.
n. 164.
Subsimilar to L. murorum, but ivell distinguished by the form of the
peripheral radii, and more especially by the shape of the spores. The
apothecia are generally numerous, becoming convex, with the thalhiie
maro'in at length excluded. The spermogones, which are rarely present,
have the spermatia bacilliform, 0,040-50 mm. long, 0,006-8 mm. thick.
Hab. On rocks and the mortar of walls, ofteu on old ruins, in maritime
and U])land districts.—Distr. Bather local in Great Britain ; not
seen from Ireland ; rare in the Channel Islands.—B. M. : Island of
Gueriisey. Framlingham, Suffolk; near Torquay and Plymouth, S.
Devon ; 'Balliaiiipton Doivns, Somersetshire ; near ( lirencester, Gloucestershire
; Quy Churchyard, Cambridgeshire ; near Bonsall, Tong Priory,
and Llanyiiiyiiech Hill, Shropshire. Blair Athole, Perthshire.
Subsp. L sym p ag e a Nyl. Flora, 1873, p. 197.—Thallus smaller,
somewhat shining, smoothish, or rugulose in th e centre ; laciniæ
narrow, contiguous, convex, incurved and subcreuate a t the apices
(K -f purplish). Apotheoia somewhat small.—Cromb. Grevillea,
xviii. p. 45.—Lichen sympageus Ach. Prodr. (1798) p. 105. P la codium
callopismum y&x. p licatum (Wedd.), Loight. Lich. F l. p. 177,
ed. 3, p. 163. In Herb. H. Davies there is a specimen with miniate
th allu s s. n. Lichen fu lv u s Dicks., b u t vide supra p. 299. According
to Acharius (Lich. Univ. p. 47) i t is Lichen aurantius Pers. in Ust.
Ann. Bot. ii. p. 14, which, being only another form of th e prior
triv ia l name Lichen aurantiacus Lightf., cannot be retained in
Lecanora.— B rit. Exs. : Mudd, nos. 94, 96 ; Larb. Lioh. H b . n. 15.
Externally often more resembling states of subsp. L. tegularis, but
definitely separated by the form of the spores. From the type it differs
so mucli in the laciniæ, th a t it is well entitled to rank at least as a
subspecies. The thallus, also, is usually smaller, often more or less
shining and waxy-looking (miniate in maritime situations), with the
apothecia ferver and smaller.
Hah. On rocks, chiefly calcareous, and on mortar of walls in maritime
(chiefly) aud upland districts.—Df«ir. General and uot uncommon
in Great Britain, the Channel Islands, and probably also in Ireland.—
B. M. : Vale Castle, Island of Guernsey ; coast of Alderney. Beigate,
Surrey ; Glynde and Peasemarsh, Sussex ; uear Eyde, Isle of Wight ;
Torquay and North Lynton, Devonshire; St. Maws, Cornwall; near
Buxton and Cromford, Derbyshire ; Llanymynech Ilill, Shropshire ;
near Southerndown,- Glamorganshire ; Manovheer, near Tenby, Pembrokeshire
; Island of Anglesea ; Bilsdale, Yorkshire ; near Ilartle-
pool, Durham; Arnbarrow, Westmoreland; St. Bees, Cumberland.
I.sland of Lismore, and Barcaldine, Argyleshire ; West Water, Fifeshire ;
Blair Athole, Perthshire; Portlethen, Kiucardinesliire ; near Aberdeen.
Dunkerron, co. Kerry ; Clegban, Coimemara, co. Galway.
Var. ft. brevilobata Nyl. Flora, 1883, p. 99.—Thallus moderate,
unequally diffract, or verruooso-areolate in tho centre, shortly or
ohsoletely lobulate a t the oiroiimference. Apothecia and spores as
in the type.
Differs in the thalline characters given, the laciniæ being also more discrete
at the apices. The two Biitish specimens seen are but sparingly
fertile.
Hah. On schistose rocks in maritime and upland tracts.—Distr. Very
rare in N.W. England and N.E. Scotland.—B. M. : Foreshield, Alston,
Cumberland. Portlethen, Kincardineshire.
14. L. cirrochroa Aoh. Syn. (1814) p. 181 ; Nyl. Not. Siillsk.
pro F . et Fl. F. Forh. v. p. 126.— Thallus orbicular, closely adnate,
narrowly laciniate, b right orange-yellow, verrueiilose and citrino-
sorediate towards the centre, radiate a t the circumference, in ternally
citrine ; radii minute, somewhat convex, occasionally whitish-
pruinose a t th e margins (K -f purplish). Apothecia minute,
scattered, plane, orange-coloured (K-|-purple), th e thalliue margin
su b en tire ; spores 0 ,0 1 3 -1 8 mm.long, 0 ,0 0 5 -6 mm. thick.—Cromb.
Grevillea, xviii. p. 4 5.— Placodium cirrochroum Cromb. Jo u rn . Bot.
1874, p. 147 ; Leight. Lich. Fl. ed. 3, p. 161. Lecanora linearis
Tayl. in Mack. Fl. Hib. ii. p. 260, according to a specimen from himself
in Hb. Brit. Mus., is only a very young state.
Easily recognized by being internally citrine and superficially more or
less citrino-sorediose. The thallus is small, rarely moderate (through the
confluence of several thalli), with the radii slender. Specimens iu Avhich
the radii become diffract and scattered (e. g. Taylor’s plant) closely
approach L. obliterans Nyl. (Flora, 1874, p. 7) and show that this, as
suspected by Nylander, I. c., is probably only a variety. W ith us it is
always sterile.
Hab. On calcareous rocks in maritime and upland districts.—Distr,
Bather local and scarce in S.W., Central, and N. England, in N. Wales;
rare iu the S.W. Highlands and the Central Grampians, Scotland, as also
in S.W. Ireland.—B. M. : Sidmouth, Devonshire ; Yatton and Weston-
super-Mare, Somersetshire; Doi'edale, Derbyshire ; Great Orme’s Head,
Carnarvonshire ; Arnbarrow and near Milnthorpe, Westmoreland ; Alston,
Cumberland. Island of Lismore, Aj’gyleshire ; Craig Tulloch, Blair
Athole, Perthshire. Dunkerron, co. Kerry.
15. L. lohulata Somm. Suppl. Lapp. (1826) p. 1 0 4 ; Nyl. Flora,
1873, p. 105.—Thallus suheffuso, arcolato-veirucose, th in , scarcely