long, 0 ,0 1 0 -1 2 mm. thick.—Cromb. Grevillea, iii. p. 2 2 ; Journ.
Hot. 1874, pp. 140, 333 ; Leight. Lioh. Fl. ed. 3, p. 25.
This rather inconspicuous plant is characterized by the apparently
constantly granulose thallus. The only specimen gathered occurred iii
small scattered pulvinuli, most of which were infertile. The nature of
the thallus and the form of the spores separate it from Leptor/ium mkro-
phyllum, to which it hears a general resemblance. The apothecia are at
first somewhat urceolate.
I/è/i. On the hark of an old ash-tree in a wooded upland district.__
D k fr. Known only from the S.W. Highlands, Scotland.—B. M. ; Shores
of Loch Katrine, Perthsliire.
b. Thallus aoervulato-aggregatc or pulvinato-congested.
6. C. c e ran is cum Nyl. Flora, 1865, p. 353.—Thallus small,
cæspitoso, smooth, opaque, pulvinato-congested, laoiuiato-divided,
d ark olive-greenish or olive-brown, divisions suhrotundato-com-
))i-essed, oeranoideo-dissected, somewhat obtuse and nodulose a t the
apices, erect or ascending. Apotheoia small, somewhat concave,
brownish-black, th e th allin e margin th in , smoothish ; spores (4- )
8uæ, ellipsoid, rounded a t both apices, 2-6 transversely seriate and
looulose, 0 ,0 2 7 -3 4 mm. long, 0 ,018-21 mm. th ic k ; paraphyses
slender ; hymenial gelatine bluish (th e thecæ more intensely so)
with iodine.—Carroll, Jo u rn . Bot. 1865, p. 287 ; Cromb. Lioh. Brit,
p. 6^ Jo u rn . Bot. 1874, pp. 140, 3 3 3 ; Leight. Lioh. Fl. p .2 4 ,e d . 3,
p. 17.— Collema ceranoides Mudd (non Borr.), Man. p. 4, pro parte!
This very distinct .species (of which Nylander has given me the above
amended diagnosis) h.as the appearance of a larger condition of Synalissa
symphorea. The thallus, whicli forma small pulvinuli, is often pale olive
a t the base, and has the gonimia moniliform. The apothecia, which are
subconeolorous with the thallus, are not at all numerous iu the specimens
seen. “ The character of the thallus with its crowded nodulose dark apices,
aud the form of the spores which are internally as if grossly botryoso-
gramdose, prevent this species being confounded with any other ” ("Nvl
in litt). - ^ ■'
Ilah. On damp shaded rocks among small mosses iu alpine places.—
B k tr . Found only very .sparingly among the S. Grampians, Scotland.
—B. M. : Summits of Ben Lawers and Craig Calliach, Perthshire.
c. Thallus macrophylline, variously lobed.
7. C. a iiric u la tum Hoffm. Deutsoh. Fl. ii. (1795) p. 98.—Thallus
dilated, slightly rigid, roundly lobed, more or less granulate, opaque,
sordid glaucous-green or olive-brown ; lobes irregularly repando-
orenate, transversely rugulose ( I -|- blood-red). Apotheoia moderate,
scattered, concave, a t length nearly plane, reddish-brown, th e margin
thick, entire ; spores ovoid or ellipsoid, 3-soptate, w ith a few longitudinal
septa, 0 ,0 2 2 -2 7 mm. long, 0 ,0 1 1 -1 5 mm. thick.—Cromb.
Journ. Bot. 1870, p. 96 ; Leight. Lioh. F l. p. 21, ed. 3, p. 17.— To
this belongs Collema dermatinum Borr. Eng. Bot. Suppl. t. 2716.
f. 2 (lower fig.). Var. membranacea Kremp., Cromb. Journ. Bot.
1874, p. 333, Leight. Lioh. Fl. ed. 3, p. 17, is a slightly th in n e r
state of th e species.
The thallus is membranaceous in texture, and has rather small gonimia.
From the allied species it is readily distinguished bj' the transversely
rugulose lobes, and by the reaction with iodine in a thin section of the
thaUus, wliich takes place immediately on application. In the British
specimens the apothecia are very rare.
Ilab. On rocks and old walls, chiefly calcareous, in upland districts.—
Distr. Local aud scarce in W., Central, and N. England, N. Wales, in
the S.W. Highlands and the S. Grampians, Scotland.—B. M .; Paignton,
S. Devon; Sherbrook and Colo Heath, Buxton, Derbyshire; Island of
Anglesea; Ashgill Force, Cumberland. Appin, Argyleshire; Killin,
Perthshire.
Subap. C. granosum Nyl. ex Cromb. Grevillea, xv. (1886) p. I I .—
Thallus smaller, thickish, more rigid, somewhat smooth or g ran u late
; lobes more elongate, variously incised, imbricate in tho
centre, crenate a t th e margins. Apotheoia and spores as in tho
type.— Collema dermatinum Borr. Eng. Bot. Suppl. t. 2716. f. 2 (two
upper figs) ; Sm. Eng. Fl. V. p. 212 ; Mndd, Man. p. 36. Leptogium
dermatinum Leight. Lich. PI. p. 29, ed. 3, p. 32. Lichen granosus
Wulf. in Jaoq. Coll. iii. (1789) p. 131, 1 .10. f. 2. Lichenoides gela-
tinosum atro-virens, aurieulatum et granosum Dill. Muse. 140, t. 19.
f. 24 A.
This is well distinguished as a subspecies by the smaller siihcoriaoeous
thallus and by the more incised, imbricate lobes. The apothecia are
sessile and numerous on our fertile British specimens.
Hab. On calcareous rocks and walls in upland districts.—Distr. Local
aud scarce in W. England, N. Wales, and S.W. Ireland.—B. M .; Cheddar
Cliffs and opposite St. Vincent’s Ilocks, Bristol, Somersetshire ; near
Cirencester, Gloucestershire; Peutragaer, Oswestry, Shropshire. Dunkerron,
CO. Kerry.
8. C. furvum Ach. Lioh. Univ. ( I 8 I 0 ) p. 650.—Thallus roundly
lobed, more or less gran u la te on both sides, d a rk greenish-brown or
olive-blaok ( I J-blood-red when dry) ; lobes irregularly complicate,
usually undulate and crisp, entire. Apotheoia moderate, somewhat
scattered, plane, brown, th e margin e n tir e ; spores ovoid or eUipsoid,
3-septate, becoming irregularly murali-looular, 0 ,0 1 8 -2 4 mm. long,
0,009-11 mm. th ick .—Hook. F l. Soot. ii. p. 7 2 ; Mudd, Man. p. 36 ;
Cromb. Lich. Brit. p. 5 ; Leight. Lich. Fl. p. 24, ed. 3, p. 17.—
Lathagrium fu r v um Gray, N a t. Arr. i. p. 400. Lichen fu r v u s Aoh.
Prodr. (1798) p. 132. Collema granulatum Sm. Eng. El. v. p. 2 1 1 ;
Tayl. in Mack. El. Hib. ii. p. 110. Lichen granidatus Huds. Fl.
Angl. ed. 2, p. 536, pro p a rte ; With. Arr. ed. 3, p. 73, pro pa rte ;
Eng. Bot. t. 1757. Lichenoides gelatinosum lobis crassioribus fusoo-
viridibus DiU. Muse. 138, t. 19. f. 22 .—Drit. E x s .: Cromb. n. 102.
The thallus, usually of moderate size, is either naked or more
frequently grauulato-furfuraceous, from the presence of numerous isidia,
occasionally giving origin to young lobules. By our older authors
Iii:
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