COLLEMODIUM. | COLLEMET. 59 
3. C. fragile Nyl. ex Cromb. Grevillea, xv. (1886) p. 12.— 
Thallus small, rosulate, laciniato-lobed, dark olive-green or olive- 
brown ; lobes convex, granuloso-unequal, radiate and crenate at the 
circumference. Apothecia minute, urceolate, at length somewhat 
plane, dark-brown, the thalline margin entire, thickish; spores 
ovoid, variously divided, about 0,029 mm. long, 0,013 mm. thick.— 
Leptogium fragile Ny]. Mém. Soc. Cherb. v. (1857) p. 8333; Cromb. 
Lich. Brit. p. 7; Leight. Lich. Fl. p. 36, ed. 8, p. 27. Collema 
fragile Tayl. in Mack. Fl. Hib. ii. (1836) p. 109; Mudd, Man. 
p. 38. 
The thallus is almost stellato-laciniate, with the lacinie irregularly 
arranged and variously divided ; the gonimic granules are rarely mouili- 
form. With its radiating laciniz, it somewhat resembles young states of 
Collema multipartitum. In the British specimens the apothecia are only 
sparingly present. 
Hab, On calcareous rocks in maritime and upland districts.—Distr. 
Only sparingly in S, and N. England and in 8.W. Ireland.—B. M.. 
Anstey’s Cove, Torquay, 8. Devon ; Barrowmouth, Cumberland. Dun- 
kerron, co. Kerry. 
4. C. plicatile Nyl. ex Lamy, Bull. Soc. Bot. Fr. t. xxx. (1883) 
p. 337.—Thallus somewhat small, laciniato-lobed, olive- or leaden- 
brown ; lobes thickish, slightly rugulose, erect or ascending in the 
centre, plicate towards the circumference, often crisp at the margins, 
more or less granuloso-furfuraceous. Apothecia small or nearly 
moderate, somewhat concave or plane, reddish-brown, the thalline 
margin thick, entire; spores ovoid, 3-septate, and irregularly murali- 
locular, 0,018-30 mm. long, 0,008-16 mm. thick.—Cromb. Gre- 
villea, xv. p. 12.—Leptogium plicatile Nyl., Cromb. Journ. Bot. 
1874, p. 8336; Leight. Lich. Fl. ed. 3, p. 30. Collema plicatile Sm. 
Eng. Fl. v. p. 208; Mudd, Man. p. 38; Cromb. Lich. Brit. p. 5; 
Leight. Lich. Fl. p. 22. Enchylium plicatile Gray, Nat. Arr. i. 
p. 397. Lichen plicatilis Ach. N. Act. Stock. xvi. (1795) p. 11, 
t. 1. f£. 2. Lichenoides gelatinosum atro-virens, auriculatum et gra- 
nosum Dill. Muse. 140, t. 19. f. 24 s—p.— Brit. Exvs.: Cromb. n. 106. 
This, as observed by Nylander (Leptogium firmum Lich. Scand. p. 34), 
resembles L. sinwatum, but the thallus is thicker, very thinly or incon- 
spicuously cellulari-corticate. The apothecia, which are scattered, are 
not very numerous in our British specimens. 
Hab. On caleareous rocks and walls, rarely on trunks of trees, in 
maritime and upland districts—Distr. Local and scarce in S. and W. 
England, rare in the W. Highlands of Scotland and in 8.W. Ireland.— 
B. M.: Near Maidstone, Kent; Shoreham, Beeding, and Lewes, Sussex ; 
Babbicombe and Plymouth, 8. Devon; Mendip Hills, Somersetshire ; 
near Cirencester, Gloucestershire. Near Appin House, Argyleshire. 
Ardtully, co. Kerry. 
Form minus Cromb. Grevillea, xv. (1886) p. 12.—Thallus smaller, 
lacini narrower, rather longer, when dry somewhat angulose ; 
