COLLEMA | COLLEMACEX 55 
Differs from the species in the narrower radiating lobes. British 
specimens are rarely fertile. 
Hab. On calcareous rocks in maritime districts.—Distr. Local 
and rare in the Channel Islands and 8. England; not yet found else- 
where.—B. M. Quenvais, Jersey; I. of Wight. 
Var. gyrosum A. L. Sm.—Thallus of crowded upright com- 
plicate lobes, crisp and crenate and often bordered with granules. 
Apothecia scattered, marginal, the thalline margin entire or 
slightly granulate—C. melenum var. gyrosum Ach, Lich. Univ. 
p. 638 (1810) ; £. gyrosum Cromb. in Journ. Bot. xii. p. 334 (1874) 
& Monogr. i. p. 52; Leight. Lich. Fl. ed 3, p. 21. Lichen gyrosus 
Ach. Lich. Suec. Prodr. p. 135 (1798). 
The crowded undulate lobes all about the same height give a 
gyrose appearance to the thallus. The apothecia are very rare in 
a fully developed condition. 
Hab. On the ground among calcareous rocks in inland situations. 
—Distr. Local and scarce in Central England and among the Gram- 
pians, Scotland.—B. M. Near Buxton, Derbyshire; Craig Tulloch, 
Blair Athole, Perthshire. 
10. C. hypergenum Nyl. in Flora lix. p. 232 (1876).—Thallus 
dark-greenish or blackish, the lobes short, upright or spreading, 
with crisp crenate margins (I + wine-red to crimson in thin 
section). Apothecia marginal or submarginal, crowded, moderate 
in size or rather large, the dise reddish or dark-brown, the 
margin entire, sometimes excluded; spores broadly fusiform, 
2—3-septate and muriform, 26-36 p» long, 10-16 » thick.—Cromb. 
in Grevillea v. p. 25 (1876); Leight. Lich. Fl. ed. 3, p. 21. 
C. melenum subsp. hypergenum Cromb. Monogr. i. p. 52 (1894). 
Exsicc. Johns. n. 284. 
Closely allied to the preceding, differing chiefly in the larger 
spores, and from C. cristatwm in the entire margin of the apothecium. 
Hab. On calcareous rocks in inland districts——Dzstr. Rare in 
N. England and W. Ireland.—B. M. Cumberland; Tullywhee Bridge, 
Galway. 
11. C. cristatum Hoffm. Deutschl. Fl. ii. p. 101 (1795).— 
Thallus intricately laciniate, olive- or blackish-green, the lobes 
short, crowded, undulate and crisp, the margins dentate or 
crenate (I + red). Apothecia rather large, plane, reddish-brown, 
the margin becoming crenulate ; spores broadly fusiform, 3-septate 
and irregularly muriform, 26-34 p long, 10-12 pw thick.—Scher. 
Enum. p. 255 (1850); Cromb. in Journ. Bot. xii. p. 334 (1874) ; 
Leight. Lich. Fl. ed. 3, p. 22. C. subplicatile Nyl. ex Cromb. 
in Journ. Bot. xii. p. 147 (1874) (non Nyl. in Flora lviii. 
p. 297). 
Closely allied to the two preceding species, differing chiefly in the 
more deeply cut margins of the lobes, the larger rarer apothecia, and 
the larger spores. 
