Hah. Overspreading decayed mosses on turfy soil in mountainous
districts.—Distr. Eare in Wales, S.W. and N.W. Ireland.—B. M.
Barmouth, Merioneth ; Olj’der, Carnarvonshire ; near Dunkerron and
Mangerton, Kerry ; Barnageelia and Doughruagh Mt., Oalway.
Form thiopsora A. L. Sm.—Thallus white-sulphureous.
Apothecia often 2-4-connate, subconvex, naked or greyish-
yellow-suffused; otherwise as in the type.—Lecidea thiopsora
Nyl. in Flora lix. p. 573 (1876); Cromb. in Grevillea v. p . 106 ;
Leight. Lich. FI. ed. 3, p. 354. L. pulvinata f. thiopsora Nyl.
in Flora Ixii. p. 223 (1879); Cromb. in Grevillea viii. p. 30.
Exsicc. Larb. Lich. Hb. n. 185.
Hah. On mossy ground among rocks in a iiiountainous region.—
B. M. Doughruagh Mt., Connemara, Galway (the only locality).
2. B. polysita A. L. Sm.—Thallus dark-grey or pale-greyish-
brown, thickish, squamulose, the squamules crenulate or sometimes
slightly concave ( K - , C aC l- ) . Apothecia brown or
brownish-black, sessile, somewhat plane, immarginate, a t length
convex and prominent; hypothecium thick, reddish-yellow, brown
or blackish-brown in a thick se c tio n ; paraphyses distinct,
colourless a t the apices and not clavate; spores acicular or
slenderly clavate, straight, 3-11-septate ; hypothecium and lower
portion of the hymenium K + p u rp le .—Lecidea polysita Stirton
in Scott. Nat. iv. p. 28 (1874); Leight. Lich. PI. ed. 3, p. 368.
Specimen not seen.
Hab. On old dead bark.—Dist. Eare in W. Scotland (Ben Brecht,
Argyll).
3. B. rosella He Not. in Giorn. Bot. Ital. ii. p. 189 (1846).__
Thallus effuse, thin, unequal or subgranulose, greyish-green or
greyish-white. Apothecia moderate, sessile, concave, then plane
with thick obtuse paler margin, a t length convex, immarginate,
rose- or flesh-coloured, slightly pruinose, whitish within ;
hypothecium colourless; paraphyses slender, loosely coherent;
epithecium granulose, yellowish; spores acicular, colourless,
0,068-98 mm. long, 0,0045-50 mm. thick ; hymenial gelatine
deep blue then sordid-violet with iodine.—Mudd Man. p. 181.
Lichen rosellus Pers. in Ust. Ann. vii. p. 25 (1794) (non Fngl.
Bot. t. 1651, vide P a rt i. p. 419). Lecidea rosella Ach. Meth.
p. 57 (1803); S. P. Gray Nat. Arr. i. p. 474; Cromb. Lich. Brit,
p. 73 ; Leight. Lich. FL p. 341 pro p a rte ; ed. 3, p. 369 pro
parte. L. alabastrina Ach. Lich. Univ. p. 190 (1810); Hook.
PI. Scot. ii. p. 40 & in Sm. Fng. FL v. p. 184; S. P. Gray I. c.
Easily recognized by the colour of the apothecia, which however
at times become rather darker in age; though numerous they are
somewhat scattered, especially when the thallus is less crowdedly
granulose. In other respects it is intimately related to the following
species.
Hab. On the trunks of trees hi maritime and upland districts.—
Distr. Very local and scarce in S., W., and N. England (Eipon,
Yorkshire, fide Mudd).—B. M. Chelsfield, Kent; near Hastings,
Sussex; near Eingwood, H a n ts ; Oldbury and near Alfriok, Worcestershire.
4. B. luteola Mudd Man. p. 183, t. 3, f. 68 (1861) pro
parte.—Thallus effuse, thin, leprose-granulose, greyish or greyish-
green (Kf + yellowish, CaCl — ), a t times nearly obsolete.
Apothecia moderate, sessile, naked, a t first concave, becoming
plane a.nd obtusely margined, a t length convex or subglobose,
the margin excluded, yellow-reddish or reddish-flesh-coloured ;
hypothecium pale-yellowish ; paraphyses slender, loosely coherent ;
ejjithecium not distinct ; spores acicular, pluri-septate (the septa
a t length 16), 0,045—90 mm. long, 0,003-45 mm. thick; hymenial
gelatine bluish then dark-wine-red or violet with iodine.—B.
rubella Massal. Bic. Lich. p. 118 (1852); Mudd Man. p. 182, t. 3,
f. 68. Lichen lutereus Gmelin Syst. Nat. ii. p. 1359 (1791)?
L. luteolus Schrad. Spicil. PI. Germ. p. 85 (1794). L. vernalis
With. Arr. ed. 3, iv. p. 14 (1796) (non L., non Hoffm.) ; Fngl. Bot.
t. 845. Verrucaria rubella Hoffm. Deutschl. PL ii. p. 174 (1795).
Lecidea luteola Ach. Meth. p. 60 (1803) (excl. vars.) ; S. F. Gray
Nat. Arr. i. p. 472; Tayl. in Mackay FL Hib. ii. p. 126;
Cromb. Lich. Brit. p. 73. L. vernalis Ach. Meth. p. 68 (1803) ;
S. P. Gray I. c. p. 470; Hook, in Sm. Fng. Fi. vl p. 183 pro
parte. L. rubella Schær. Spicil. p. 168 (1836); Leight. Lich. FI.
p. 341 ; ed. 3, p. 369 (excl. syn. Lichen porriginosus) ; Cromb. in
Grevillea xxii. p. 58.
Exsicc. Bohl. n. 91 ; Leight. n. 92 ; Cromb. n. 86 ; Larb.
Lich. Hb. n. 184.
Lichen lutereus Gmelin is quoted by Acharius (Prod. Lioh. Suec.
p. 42 (1798) ) as a synonym, but this identification is uncertain. The
species-name vernalis, based on Lichen vernalis Lightf. (FL Scot. ii.
p. 805 (1777) ) has been adopted by some authors ; but Lightfoot’s
plant is identical, in part a t least, with Lecanora ferruginea (Pt. i.
p. 376). Lichen rubellus Ehrh. does not rank, being only a herbarium
name. The apothecia are usually abundant and scattered, but sometimes
there are several aggregate with the margin irregular and
sublobate. ■
Hdb. On trunks of trees, chiefly elms, in wooded maritime and
upland situations.—Distr. General and common in most parts of
England, rare in Wales, Scotland, Ireland, and the Channel Islands.
—B. M. Patrimoine, Jersey ; Guernsey ; Ulting, Broomfield, Gosfield
Hall, Quendon and Epping Forest, Essex; Chilstone Park, Kent;
Middleton, Lavington Park, Chanotonbury and Glynde, Sussex ;
Lyndhurst, New Forest, Hants ; Ilsham, Torquay, Devon ; Kynanoe,
Coverack, near the Lizard, St. Judy and near Penzance, Cornwall
; Bathampton Downs, Somerset ; near Bourton - on - Water,
Cirencester, Clifton and Chesterton, Gloucestershire ; near Cambridge ;
near Yarmouth, Norfolk ; Gopsall, Leicestershire ; Broadwas and
near North Malvern, Worcestershire ; Aberdovey, Merioneth ; Oswestry
and Skelton Eough, near Shrewsbury, Shropshire; Kildale and
Newton Wood, Cleveland, Yorkshire; Teesdale, Durham; Airds,
Appin, Argyll ; Craiglockart, near Edinburgh ; Aberfeldy, Perthshire ;