52 COLLEMACEI. [couLEMA. 
Huds. Fl. Angl. ed. 2 (1778), p. 584; With. Arr. ed. 3, iv. p. 35 5 
Eng. Bot. t. 1924. Lichenoides gelatinosum fuscum, Jacobee mart- 
time divisura Dill. Muse. 140, t. 19. f. 25. 
This differs from the type in the form of the lacinie, the situation of 
the apothecia, and their entire margin. The thallus also is not so dark 
when growing, and the apothecia are more scattered, and concave when 
young. 
Hab. On calcareous rocks and walls in maritime and upland tracts.— 
Distr. Probably general, though as yet seen only from W. England, N. 
Wales, the W. Highlands, Scotland, and 8S. Ireland.—B.M.: Near 
Torquay, Devonshire; Pentregaer, near Oswestry, Shropshire; near 
Wrexham, Denbighshire; near Settle, Yorkshire; Teesdale, Durham ; 
near Kendal, Westmoreland ; Lamplugh, Cumberland. Appin, Argyle- 
shire; Gairloch, Ross-shire. Middleton, co. Cork; Dunkerron, co. 
Kerry; Loughcooter, co. Galway. 
Form 2. jacobeifolium Ach. Lich. Univ. (1810) p. 637.—Thallus 
deeply laciniate; lacinie lacero-pinnatifid, radiate, narrow, canali- 
culate, the margins crisp. Apothecia marginal, the thalline margin 
subentire—Mudd, Man. p. 37; Cromb. Journ, Bot. 1874, p. 334; 
Leight. Lich, Fl. ed. 3, p. 21.—Lichen jacobeefolius Schrank, FI. 
Bay. (1789) ii. p. 530 —Brit. Exs.: Larb. Cesar. n. 2. 
Very closely allied to the preceding, differing in the more deeply 
divided, radiating, narrower laciniz, and the subentire thalline margin of 
the apothecia. The fructification is very rarely present in the British 
specimens. 
Hab. On calcareous rocks in maritime districts — Dist. Local and rare, 
in the Channel Islands and 8. England; it no doubt occurs elsewhere.— 
B. M.: Quenvais, Island of Jersey. Isle of Wight. 
Form 3. gyrosum Ach. Lich. Univ. (1810) p. 638.—Thallus 
gyroso-complicate ; lacinie: approximate, subequal, crisp and crenate 
at the margins. Apothecia scattered, marginal, the thalline margin 
entire or slightly granulate—Cromb. Journ. Bot. 1874, p. 334; 
Leight. Lich. Fl. ed. 3, p. 21.—Lichen gyrosus Ach. Prodr. (1798) 
p. 135. 
This form (identified from a specimen of Acharius in Linn. Soc.) is 
not unlike C. eristatwm, and differs from the type in the gyrose laciniz, 
which are plicate, densely approximate, and nearly even at the margins, 
oe apothecia are scattered, but.are very rare in a fully developed con- 
ition. 
Hab. On the ground among calcareous rocks in upland situations— 
Distr. Very local and scarce, in Central England and among the Central 
Grampians, Scotland—bB.M.: Near Buxton, Derbyshire. Craig Tul- 
loch, Blair Athole, Perthshire. 
Subsp. C. hypergenum Nyl. Flora, 1876, p. 232.—Thallus lacero- 
laciniate ; laciniee somewhat narrow and short, the margins crisp and 
crenate. Apothecia marginal or submarginal, approximate, the 
thalline margin entire; spores 0,026-86 mm. long, 0,010-16 mm, 
thick.— Cromb. Grevillea, v. p. 25; Leight. Lich, Fl. ed. 8, p. 21. 
