* i
rincliing'thorpe, Cleveland, Yorkshire; Kendal, Westmoreland; near
W’hitehaven, Cumberland. Near Edinburgh; near Glasgow; Appin,
Argyleshire ; Killin, Perthshire ; near Aberdeen ; Fort William, Inverness
shire. Mallow, aud near Cork ; Tullywhee Bridge, co. Galway.
Form 1 . nudum Nyl. Syn. i. (1858) p. I l l ; Lich. Soand. p. 31.—
Thallus platyphyllous, lobate,usually naked; otherwise as in th e type.
—Leight. Lich. F l. ed. 3, p. 20.— GoUema crispum var. nudum
Sohær. Enum. (1850) p. 25.
This form is more distinctly and broadly lobed, and but sparingly, if at
all, granulose. The colour of the thallus and of the apothecia is usually
paler.
Hah. On the mortar of old walls in upland situations.—Distr. Local
and scarce in S. and W. England, the W. and S. Highlands, Scotland,
aud S. Irelan d—B. M. : Near Ventnor, Isle of Wight ; Torquay, S.’
Devon ; near Cirencester and Burton-on-the-Water, Gloucestershire •
near Farlow, Shropshire. Appin, Argyleshire ; Ben Lawers, Perthshire!
Killarney and Dunkerron, co. Kerry.
Form 2. monocarpon Nyl. Syn. i. (1858) p. 111.—Thallus microphyllino,
or nearly obliterated, visible chiefly about the apothecia.__
Cromh. Jo u rn . Bot. 1874, p. 147.— Collema monocarpon Duf ex
Nyl. 1. c.
The thallus is more or less scattered and microphylline, but often is
scarcely visible, except as a granulate margin to the apothecia. In perfect
specimens it is occasionally more developed at the circumference.
Hah. On the mortar of old walls, rarely on calcareous rocks in maritime
and upland situations.—Distr. Local and scarce in S. and S.W. England,
no doubt overlooked elsewhere.—B. M. : Shanklin, Isle of Wight •
near Hastings, Sussex ; near Cirencester, Gloucestershire. ’
e. Thallus variously laciniate.
16. C. gramilifenim Nyl. Flora, 1875, p. 103.—Thallus imbri-
cato-laoiniate, firm, sprinkled with isidiose globules, dark olive-
green or blackish, laciniæ usually somewhat erect and crowded in *
th e centre, beneath often longitudinaUy and crowdedly plioatulo-
rugnlose when dry. Apothecia moderate, slightly concave or plane,
th e thalline margin a t length suborenate, isidiose; spores ovoid!
3-septate, sometimes with 1 -2 longitudinal septules, 0 ,0 2 4 -3 2 mm!
long, 0 ,0 0 8 -1 2 mm. thick.—Cromb. GreviUea, iii. p. 191 ; Leight!
Lich. Fl. ed. 3, p. 21.— Collema pulposum var. granulatum Mudd,
Man. p. 38. Lichengranulatus pro pa rte of our older authors. B r it.
E xs. : Larb. Lich. Hb. n. 204.
In the thaUus and the fructification this species is subsimilar to C.
meloenum, but is at once distinguished by the peculiar isidiose globules'
with which it is sometimes almost entirely covered. A larger and a
smaller condition occurs, to the former of which is to be referred C. flac-
cidum, var. microlobum Nyl., e:c Carroll, Journ. Bot. 1868, p. 100 Cromb.
Licli. Brit. p. 5, and C. suhplicatile, var. meizolobmn Nyl, Cromb. Journ.
Bot. 1874, p. 334; but these are connected by intermediate states. The
apothecia are rare and scarcely seen in the larger condition.
Hab. On calcareous walls and rocks, rarely among mosses on the
ground in upland districts.—Dfsi;-. Probably general and common iu tlie
hilly aud mountainous tracts of Great Britain aud Ireland.—B. M .;
Slianklin, Isle of W ig h t; Plymouth, Elburton, Paingtou, Ogwell, and
near Kmgsbndge, S. Devon; St. Alinver, Cornwall; Bathampton Downs,
Weston-super-Mare, and Cheddar Cliffs, Somersetshire; Leigh Woods
near Bristol, Gloucestershire; Tenby, Pembrokeshire; Beaumaris, Island
of Anglesea; near Buxton, Derbyshire ; Pentregaer, Oswestry, Shropshire;
Redcar, Cleveland, Yorkshire; near Whitehaven, Cumberland
Appin, Argyleshire; Killin and Ben Lawers, Perthshire; S. of Fort
Villmin, Inverness-shire. Killarney, co. Kerry; near Kylemore and
Kecess, Connemara^ co. Galway.
17. C. melaenum Ach. Lich. Univ. (1810) p. 636.— Thallus depressed,
laoero-hioiuiate, greenish- or olive-black ( I wino-red in th in
section); lacinim more or loss elongate, somewhat broad and imbricate,
the margins elevated, undulate, crisp and crenate. Apothecia moderate,
sessile or slightly elevated, submarginal, plane, reddish-brown
or blackish, th e th allin e margin somewhat gran u la te ; spores ovoid,
2 -3 -sep ta te and irregularly divided, 0 ,0 2 1 -2 7 mm. long, 0 ,0 0 9 -
11 mm. thick. — Mudd, Man. p. 3 7 ; Cromb. Lioh. B r i t . ’p. 5
pro p a rte ; Jo u rn . Bot. 1874, p. 3 3 4 ; Leight. Lich. F l. p. 19 pro
parte, cd. 3, p. 20 .— Lichen melamus Aoh. Prodr. (1798) p. 130. 0.
aaricidatumYiir.pinguescensNyl.'Elora, 1 8 7 2 ,p. 3 5 3 ; Cromb.Journ!
Bot. 1873, p. 1 3 3 ; Leight. Lich. F l. ed. 3, p. 17 {cfr. Nyl. Flora,
1883, p. 534).
^ The depressed orbicular thallus, and the form of the laciniae readily
distinguish this from the allied species. In favourable situations it is
often considerably expanded, and then iu old plants becomes centrifugal.
I he apothecia are not uncommon, generally numerous, situated
towards the margins, and at length slightly convex aud concolorous
with the thallus. On the sterile thallus is rarely seen a parasitic Ohrtjzum,
which must not be confounded with the spermogones.
Hah. On calcareous rocks and old walls in maritime and upland
districts.—Distr, Local and scarce iuN. England, the W., Central, aiidN.
Highlands of Scotland.—B. AI.; Near Buxton, Derbyshire; Teesdale
Durham; Kendal, Westmoreland; near Alston, Cumberland. Island of
Lismore and Appin, A rgyleshire; Killin, Ben Lawers, and Craig Tulloch,
1 ertlisbire; Craig Guie and Alorrone, Braemar, Aberdeenshire; Coyg-ach
Sutherlandshire. ° ’
E o rm l. m a rg in a le Ach. Lioh. Univ. ( I 8 I 0 ) p. 637.— Thallus
olongato-laoiniate, lacinim narrow, caiialioulate, th e margins crisp
and oronate. Apotheoia marginal, scattered, tho thalline margin
prominent and entire —Aludd, Man. p. 37 ; Cromb. Journ. Bot. 1874,
p. 334 ; Leight. Lich. Fl. ed. 3, p. 21.— Collema marginale H ook. Fl!
Scot. ii. p. 71 ; Engl. Fl. v. p. 210 ; Tayl. in Mack. FÌ. Hib. ii. p. 109
Fmchglium marginale Gray, Nat. Arr. i. p. 397. Lichen marginalis
e 2
:b'l