See 
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: 
54 CYCLOCARPINER [COLLEMA 
greenish- or olive-black, generally orbicular in outline, with deeply 
cut laciniz, rarely granular, the lobes narrow or somewhat broad, 
often crowded and imbricate, more or less erect at the margins, 
crisp and crenate or lacerate (I + wine-red in thin section). 
Apothecia small to moderate in size, sessile or somewhat promi- 
nent, on or near the margins of the lobes, reddish-brown or 
blackish, the thalline margin entire or crimped or breaking into 
granules; spores ovoid, 2—3-septate, irregularly muriform, 
21-27 » long, 9-11 p thick —C. melenum Ach. Lich. Univ. 
p- 636 (1810) (incl. var. marginale) ; Hook. Fl. Scot. ii. p. 71 
(1821); Grev. Fl. Edin. p. 350; Mudd Man. p. 37; Cromb. 
Lich. Brit. p.5 & Journ. Bot. xii. p. 334 (1874) (inel. £. mar- 
ginale & £. complicatum); Leight. Lich. Fl. p. 19 (incl. var. 
complicatum) ; ed. 3, p. 20 (incl. f. marginale and var. complicatum). 
C. marginale Hook. in Sm. Engl. Fl. v. p. 210 (1833) ; Tayl. in 
Mackay FI. Hib. ii. p. 109. C. auriculatum var. pinguescens Nyl. 
in Flora lv. p. 353 (1872) & Ixvi. p. 534 (1883); Cromb. in 
Journ. Bot. xi. p. 133 (1873); Leight. Lich. Fl. ed. 3, p. 17. 
Lichenoides gelatinosum fuscum, Jacobex maritime divisura Dill. 
Hist. Muse. p. 140, t, 19, fig. 25 (1741). Lichen multifidus 
Scop. Fl. Carn. p. 396 (1772). L. marginalis Huds. Fl. Angl. 
ed. 2, p. 534 (1778); With. Arr. ed. 3, iv. p. 34; Engl. Bot. 
t.1924. Enchylium marginale 8. F. Gray Nat. Arr. i. p. 397 (1821). 
Exsicc. Croall n. 604 ; Johns. nos. 43, 283. 
The thallus is very dark-coloured when dry, with crowded, rather 
thin lobes, and often rather wide-spreading. The margins of the lobes 
are often deeply lacerate-crenate and sometimes bordered with minute 
outgrowths. The apothecia are generally numerous, their position 
exactly on the margin—a distinguishing character of f. marginale— 
is not constant. 
Hab. On calcareous rocks and walls in maritime and inland 
districts.— Distr. Probably general, though somewhat uncommon, 
throughout the British Islands.—B. M. Near Torquay, Devonshire ; 
Manorbeer, Pembrokeshire; Pentregaer, near Oswestry, Shropshire ; 
Llangollen and Wrexham, Denbigh; near Buxton, Derbyshire; near 
Settle, Yorkshire; near Kendal, Westmoreland; near Alston and 
Lamplugh, Cumberland; Teesdale, Durham; Island of Lismore and 
Appin, Argyll; Glen Tilt, Killin, Ben Lawers and Craig Tulloch, 
Perthshire ; Braemar, Aberdeenshire ; Gairloch, Rossshire ; Middleton, 
Cork; Dunkerron, Kerry; Loughcooter, Galway. 
Var. jacobeifolium Scher. Enum. p. 255,—Thallus more 
deeply laciniate, the lobes radiate, pinnatifid, narrow and canali- 
culate, the margins crisp and lacerate. Apothecia marginal, with 
subentire margin.—C. melenum var. jacobsifolium Ach, Lich, 
Univ. p. 637 (1810); Mudd Man. p. 37 ; £. jacobeifolium Cromb. 
in Journ. Bot. xii. p. 354 (1874) & Monogr. i. p. 52; Leight. 
Lich. Fl. ed. 3, p. 21. Lichen jacobeifolius Schrank Bai. FI. ii. 
p. 530 (1789). 
Exsice. Larb. Lich, Cesar. n. 2. 
