m
varia it at once differs in the leprose thallus, though in all oth^er respects
it nearly agrees with that species (Nyl. in litt). The margin of the young
apotliecia is leproso-pulverulent.
Ilab. On old beeches (n e a r the roots) and on aged p i n e s in wooded
upland tracts.-DfsZr. Only a few localities m E S., Central, and N.
Enteand, but plentiful in these.—B. M .; N e a r Highbeech, Epping forest,
Ess°ex; New Forest, Hampshire; near Buxton, Derbyshire; Overend,
Egremont, Cumberland.
118. L. ex p allen s Aoh. Lich. Univ. (1810) p. 374.—Thallus
effuse, thin or thinnish, leproso-pulverulent, pale-sulphur-ooloured
(K + yellow, CaCl + orange-red). Apotheoia small, lecanorine, subinnate,
plane or slightly convex, pale-yellow or flesh-coloured, the
tlialline margin th in , pulverulent, a t length o b lite ra ted ; spores
ellipsoideo-oblong, 0 ,0 1 1 -1 6 mm. long, 0 ,0 0 4 -5 mm. t h i c k . -
Cromb. Grevillea, xviii. p. 69 ; Leight. Lich. Fl. p. 199 pro parte
ed. 3, p. 184 pro parte.— Lecidea expallens Sm. Eng. Fl. v. p. 181
(exol. “ on rooks ” ) ; Tayl. in Mack. F l. H ib . ii. p. 127. Leprarra
expallens P e r s . / * Aoh. I. c. Lecanora varia c. orosZAeaMudd, Man.
p. 150. Lichen orostheus Fu g . Bot. t. 1549.—B rit. E x s . : Larh.
Lioh. Hb. n. 216.
Easily recognized by the colour of the leprose thallus which.spreads
very extensively over the substratum. In more shaded habitats it is
somewhat thicker, whitish-sulphureous, sterile, and might readily be
taken for a “Lepraria." The apothecia, which are comparatively rare,
are usually somewhat scattered, tbougb at times several are subcon-
fliient. The spermogones, which, however, are much more HequeM ™
the following variety, have the spermatia 0,020 mm. long, 0,0009 mm.
thick {Jide Nyl. in litt.).
Hab On the trunks of trees, firs and oaks, and on old pales in lowland
and upland districts.—DfsZr. Here and there throughout Fngland and in
N. Wales; rare in S.W. and N.AV. Ireland; not seen from Scotland,
though no doubt it exists there in a leprarioid state.—B. M .; Ihettord,
Norfolk; Ickworth, Suftblk; Tetsworth, Oxfordshire; New Forest,
Hants ; near Newton Abbot, Devonshire ; Coleshorne and Oakley Park,
Cirencester, Gloucestershire ; Upton, Worcestershire ; Dolgelly, Merionethshire
; Garn Dingle, Denbighshire; Island of Anglesea ; Airyholme
Wood and Ripon, Yorkshire; St. Bees, Cumberland. Ballynabinch,
Connemara, co. Galway.
Var. p. lu te sc en s Nyl. Flora, 1872, p. 248.
granulato-pulverulent. Apothecia numerous,
convex, submoderate, sessile, w ith th e thalline
excluded. — Cromb. Grevillea, xviii._ p. 6 9 . -
Cromb. Journ. Bot. 1873, p. 133 ; Leight. Lich.
Patellaria lutescens DC. Fl. F r. ii. (1805) p.
Cromb. n. 65.
Differs from the type, w ith which it has usually been confounded, in
the more granulose tballus, and the larger, sessile apotbecia with epulve-
rulent thaliine margin. These are often so numerous as almost to obliterate
the thaUus.
—Thallus minutely
crowded, a t length
margin inflexed or
- Lecanora lutescens
Fl. ed. 3, p. 164.—
3 54.—B r it. E xs. :
433
^ Hab. On the trunk.s of trees and on old pales, especially fir, iu maritime
and upland districts.—Distr. Probably general in Great Britain,
usually plentiful where it occurs ; rare in the Chanuel Islands and S.
Ireland.—B. M. : Beauport Bay, Island of Jersey. Lydd, Kent; New
Forest, Hants; near Torquay and Totness, S. Devou; Hoche, Cornwall;
Malvern, AVorcestershire ; near Ludlow, Herefordshire; Bettws-y-Coed
and Trefriw, Carnarvonshire; Staveley, near Kendal, AA'estmoreland;
Ennerdale, Cumberland. New Galloway, Kirkcudbrightshire ; Barcal-
diiie, Argyleshire ; Craig Calliach and near Loch Tummel, Perthshire ;
near Forfar; Durris, Kincardineshire ; Countesswells Wood, near Aberdeen,
and Mar Forest, Braemar, Aberdeenshire; Rothiemurchus Woods,
Inverness-shire. Glenbower Wood and Castlebernard Park, co. Cork.
Var. y. smaragdocarpa Nyl. Flora, 1872, p. 248, nota 1.—■
Thallus as in th e type. Apotheoia b rig h t emerald-green.—Cromb.
Grevillea, xviii. p. 09.
From the peculiar colour of the apothecia to be regarded as a distinct
variety. In the only British specimen the thallus is scarcely visible,
though the apothecia are .somewhat crowded, convex, with the margin at
length excluded.
Hab. On decorticated stumps of oak iu an upland district,—Distr. Very
rare in Central England.—B. M. : Summit of the Chiltern Hills, Oxfordshire.
Subsp. L. inversa Nyl. Flora, 1879, p. 361.—Thallus nearly as
in th e typo. Apotheoia small, th e thalline margin distinct, persistent,
subentire, epulverulent ; spores not seen.—Cromb. Grevillea,
xviii. p. 69.
As observed by Nylander I. c. the tliallus (which is somewhat firmer)
agrees in the reaction with L. expallens, while the thalUne margin of the
apothecia is subsimilar to th at of L. varia. Were the spores knowu, it
might probably be a distinct species.
Hab. On the branches of furze in an uplaud district.—Distr. Only' a
fragmentary specimen from S.W. Ireland (s. n. Lecanora albo-fiavida
Tayl. nov. sp.).—B. M. ; Finnechy River, co. Kenw.
119. L. symmicta Ach. Syn. (1814) p. 340 ; Nyl. Flora, 1872,
p. 249. — ThaUus subeffuse, th in or very thin, subleprose or
minutely granulose, pale yellowish-green or whitish-straw-coloured
(K + yeUow, CaCl + orange). Apotheoia small, biatorine, a t first
plane w ith th in , entire margin, speedily convex and immarginate,
pale-yellow or pale-testaoeous, p a rtly olivaceous; spores oblong,
0 .0 1 1 -1 4 mm. long, 0 ,0 0 4 -5 mm. th ic k ; paraphyses slender, not
very well discrete ; hymenial gelatine bluish, th en sordid-yellow
with iodine.—Cromb. Grevillea, xviii. p. 69.—Lecanora symmicta
Leight. Lieh. F l. ed. 3, p. 183 (exol. vars.). Lecanora varia
1. symmicta Aoh. Lioh. Univ. (1810) p. 379 ; Aludd, Man. p. 150
pro pa rte ; Cromb. Lioh. Brit. p. 52 pro pa rte ; Leight. Lioh. F’l.
ed. 1, p. 193 pro parte.
May be recognized from its more immediate allies chieflv by tbe con-
2 f