29. L. Viridescens Ach. Meth. p. 62 (1803).—Thallus effuse,
thin, minutely granulose-leprose, pale-greenish (Kf + yellowish,
K(CaCl) + crimson). Apothecia minute, almost sessile, subconvex,
subimmarginate, opaque, brownish- or livid-black, within dark or
whitish ; hypothecium p a le ; paraphyses slender, subconcrete ;
spores ellipsoid, 0,010-13 mm. long, 0,004—6 mm. thick; hymenial
gelatine bluish with iodine.—Mudd Man. p. 196; Cromb. Lich.
Brit. p. 67; Leight. Lich. FI. p. 264; ed. 3, p. 262. Lichen
viridescens Schrad. Spicil. p. 88 (1794).
Lxsicc. Mudd, n. 164 (as L. prasina); Cromb. n. 81.
Might a t first sight be taken for a lignicolous form of L. granulosa,
from which the smaller, constantly darker apothecia, the smaller
spores, &c., distinguish it. The apothecia are sometimes solitary or
more frequently crowded and confluent.
Hah. On decayed trunks of trees in upland and maritime wooded
districts.—Distr. Only a very few localities in England and the S.W.
Highlands of Scotland.—B.M. New Forest, Hants ; Hurstpierpoint,
Sussex; Oaksey, Wiltshire; Oswestry, Shropshire ; Hoggart’s Wood,
Ingleby, Yorkshire ; Barcaldine, Argyll.
30. L. gelatinosa Floerke in Berl. Mag. 1809, p. 201.__
Thallus effuse, thin, leprose-gelatinous, greenish-grey or sub-
seruginose (K —, CaCl — ), a t times nearly evanescent. Apothecia
submoderate, appressed, plane, blackish or livid, with thin, paler
margin, a t length immarginate, pale-brownish with in ; hypothecium
colourless or pale-yellowish-brown; paraphyses slender,
olive or brownish a t the apices; spores ellipsoid or oblong-
ellipsoid, 0,007-9 mm. long, 0,004-5 mm. th ic k ; hymenial
gelatine slightly bluish then tawny-wine-reddish with iodine.—
Cromb. Lich. Brit. p. 66 ; Leight. Lich. FI. p. 299; ed. 3, p. 308.
L. viridescens var. ¡3 gelatinosa Mudd Man. p. 196 (1861).
Biatora viridescens var. a gelatinosa Koerb. Syst. Lich. Germ
p. 201 (1855).
Exsicc. Leight. n. 353 ; Larb. Lich. Hb. n. 30.
Differs from the preceding, of which it has frequently been regarded
as a variety, in the thinner subgelatinous thallus, the plane apothecia
and the smaller spores. The apothecia, though numerous, are somewhat
scattered, becoming at length difform.
Hab. On the bare ground, rarely incrusting decaying mosses, in
upland situations.—Distr. Very few localities in Great Britain and
Ireland.—B.M. The Downs, Sussex [Withiel, Cornwall; Stiperstones
Hill and the Wrekin, Shropshire; Guisboro’ Moor and near Ayton,
Cleveland, Yorkshire; Glen Falloch and Aberfeldy, Perth sh ire ; Barcaldine,
Argyll; near Bantry, Cork; Lough Muck, Connemara,
Galway.
Subsp. prasinorufa Nyl. in Flora Ixv. p. 453 (1882).—
Thallus sorediose, the soredia rotundate, somewhat plane,
greenish. Apothecia small, immarginate, dark-red, pale w ith in ;
hypothecium colourless; spores ellipsoid, 0,009-0,010 mm. long,
0,004 mm. thick.
Differs from the type chiefly in the soredia and the colour of the
fructification. In the British specimens the apothecia are sparingly
present. The sterile plant is probably not uncommon in the
Highlands of Scotland, where the soredia are either yellowish or
subaeruginose.
Hab. On turfy ground in an upland hilly district.—D. M. Dartmoor,
Devon (the only locality).
31. L. Wallrothii Floerke ex Spreng. Neue Fntdeckung. ii.
p. 96 (1821).—Thallus effuse, thickish, appressed, granulose-
squamulose, whitish or glaucous, the granules more or less
scattered, or usually congested and confluent (K + yellow,
K(CaCl)+red). Apothecia appressed, moderate or somewhat
large, plane or convex, pale- or dark-brown, subpruinose, the
margin pale, thin, inflexed; paraphyses slender; hypothecium
pale; spores ellipsoid, 0,018-21 mm. long, 0,009-11 mm. th ick ;
hymenial gelatine bluish then sordid wine-red with iodine.—!
Cromb. in Grevillea xxii. p. 9. L . glebulosa Nyl. in Act. Soc
Linn. Bord. ser. 3, i. p. 357 (1856); Cromb. Lich. Brit. p. 66
(1870). L. Salweii Borr. in Engl. Bot. Suppl. t. 2861 (1834)
Leight. Lich. FI. p. 249 ; ed. 3, p. 241. Biatora glebulosa P r
Lich. Eur. p. 252 (1831) (excl. syn. Engl. Bot. t. 1955).
Exsicc. Larb. C/esar. n. 32 ; Lich. Hb. n. 303 ; Cromb. n. 170
A very distinct species, easily recognized by the subsquamulose
thallus and slightly pruinose apothecia, which distinguish it from all
states of i . granulosa, to which it is somewhat similar. The
apothecia, at first plane and thinly margined, become at length convex,
often several confluent and immarginate.
_ Hab. On the ground in crevices of rooks in maritime, rarely mountainous
districts.-Dfsfr. Bather local, though usually plentiful where
ff occurs in the Channel Islands, S.W. England and Wales.—B. M
Beaufort Bay and the Warren, Noirmont, Jersey; Saint’s Bay,
Guernsey; Valley of Books, Lynton, Devon; near Bodmin, St.
Michael s Mount, Hensborrow, and near Penzance, Cornwall; near
I ishguard, Pembrokeshire ; banks of the Teify, Cardiganshire.
32. L. demissa Th. Fries Lich. Scand. p. 420 (1874). _
Thallus subdeterminate, adnate-squamulose, greenish-brown or
lurid-greyish, the squamules smooth, verrucose-tumid or subimbricate
( K - , C a C l - ) ; hypotballus black. Apothecia small
or moderate m size, adnate, plane or convex, reddish-brown or
blackish, whitish within, the margin thin, soon obliterated;
paraphyses stoutish, incrassate and brown a t the apices •
colourless; spores ellipsoid, 0,010-17 mm. long!
0,006-8 mm. thick ; hymenial gelatine deep blue with iodine —
L. atrorufa Ach. Meth. p. 74 (1803) & Lich. Hniv. p. 200 ■
Carroll in Journ. Bot. iv. p. 23 (1866); Cromb. Lich. Brit.'
u 4- F Lichen demissus
Rutstr. Diss. PL Crypt, p. 8 (1794). L. atrorufus Dicks. Crypt,
fasc. IV. p. 22 t. 12, f. 4 (1801); Engl. Bot. 1. 1102. Lepidoma