Collema.] 



LICHENES. HI 



small, crowded, rounded, sinuato-incised, crisped, nearly entire ; 

 apothecia scattered, sessile, brownish, their border entire. Hook. 

 Eng. Flor. v. 5, p. 213. Eng. Bot. t. 772. 



On rocks, walls, and on the earth. Near Belfast, Mr. Templeton ; 

 near Bantry, Miss Hutchins : at Dunkerron, where it is never found 

 but on limestone. 



16. C. tremolloides, Ach. Thallus foliaceous, membranace- 

 ous, very thin, almost diaphanous, smooth on both, sides, of a 

 leaden green colour, lead coloured and opaque when dry ; the 

 lobes oblong, rounded, sometimes incised, entire ; apothecia 

 sessile or elevated, flat, reddish, with a smooth, pale border. 

 Ach. L. Un. p. 655. Eng. Bot. t. 385. 



In moist woods. Near Belfast, Mr. Templeton. Dargle River, 

 Br. Whitley Stokes. Near Bantry, Miss Hutchins. Askew Wood, 

 County of Kerry. In a dry state the shining surface of the thallus, 

 its lead colour, entire edges, and the elevation of the neat apothecia 

 are very characteristic. 



17. C. lacerum, Ach. Thallus foliaceous, membranaceous, 

 subdiaphanous, when dry reticulato-subrugose, glaucescent, or 

 bluish brown ; the lobes small, subimbricated, finely jagged 

 and fringed; apothecia scattered, minute, concave, reddish, with 

 a pale border. Ach. L. Un. p. 657. Eng. Bot. t. 19S2. /3. 

 proliferum. 



Among mosses ; common. At Askew Wood, Countyof Kerry, a 

 variety, (if it be only a variety,) in a barren state, occurs, in which the 

 lobes are minute, ascending, concave, slightly waved, quite entire, of a 

 dull dun-green when wet, lead coloured when dry. There is, indeed, a 

 crenulate appearance of the lobes, but a magnifier shows this to arise 

 from minute, round, entire foliaceous buds, that issue from the edges of 

 the frond ; these, when grown to half the size of the fronds, remain 

 perfectly entire ; and hence may, perhaps, with much propriety, be 

 considered a proliferous state of the present species. 



* * * * Thallus cut into numerous slender branches. 



18. C. subtile, Ach. Thallus substellated, blackish-green, 

 lacinice appressed, narrow-linear, subdivided, entire, obtuse, 

 radiating ; apothecia central, flattish, very minute, brownish, 

 with a narrow entire border. Ach. L. U. p. 659. Eng. Bot. t. 

 1008. 



On wet clay : not uncommon in winter and spring. 



12. C. muscicola, Ach. Thallus tufted, shrub-like, dark, olive- 

 brown ; the branches cylindrical, erect, flexuose, somewhat 

 knotted, obtuse; apothecia subterminal, flat, brown, their mar- 

 gin entire. Ach.L. U. p. 660. E. Bot. t. 2264. 



Among mosses ; very common. 



20. C. spongiosum, Ach. Thallus of a dull green, the seg- 

 ments crowded, branched, granulated, cylindrical, obtuse ; apo- 



