COLLEMODIUM.] COTXEMET. 59 



3. C. fragile Nyl. ex Cromb. Grevillca, xv. (1886) p. 12.— 

 Thallus siikJI, rosulatc, laciniato-lobed, dark olive-green or oUvc- 

 brown ; lo])es convex, granuloso-unequal, radiate and crcnate at the 

 circuralc'renf'c. Apothecia minute, urceolate, at length somewliat 

 plane, dark-brown, the thalline margin entire, thickish; spores 

 ovoid, variously divided, about (.),02!J mm. long, (),Ol;J mm. thick. — 

 Leptofjiinn fragUe y.\\. Mom. Soc. Cherb. v. (1857) p. 333 ; Cromb. 

 Lich. Brit. p. 7 ; Leight. Lich. Fl. p. 36, ed. 3, p. 27. Collewa 

 fraqile Tavl. in Mack. Fl. Hib. ii. (1836) p. 109; Mudd, Man. 

 p. 38. 



The tballus is alrao.^t stellato-laciniate, with the lacinife in-egularly 

 an'anged and variously divided ; the gonimic gi-anules are rarely niouili- 

 form. With its radiating lacinife, it somewhat resembles young states of 

 Collema nmltiparfititm. In the British specimens the apothecia are only 

 sparingly present. 



Ilab. On calcareous recks in maritime and upland districts. — Dixfr. 

 Only sparingly in S. and N. England and in S.W. Ireland. — B. M. : 

 Anstey's Cove, Torquay, S. Devon : Barrowmouth, Cumberland. Dun- 

 kerron, co. Kerry. 



4. C. plicatile Xyl. ex Lamy, Bull. Soc. Bot. Fr. t. xxx. (1883) 

 p. 337.-^Tballus somewhat small, laciniato-lobed, olive- or leaden- 

 brown ; lobes thickish, slightly rugulose, erect or ascending in the 

 centre,- plicate towards the cipcT.mference, often crisp at the margins, 

 more or less granuloso-furfuraceous. Apothecia small or ncarlj- 

 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. — Leptoqvnn plicatile Nvl., Cromb. Journ. Bot. 

 1874, p. 336 ; Leight. Lich. Fl. ed. 3, p. 30. CoUema plicatile Sm. 

 Eng. Fl. V. p. 209 ; Mudd, Man. p. 38 ; Cromb. Lich. Brit. p. 5 ; 

 Leight. Lich. Fl. p. 22. Enchi/liitm jjUccitile Gray, Xat. Arr. i. 

 p. 397. Lichen plicatilis Ach. K. Act. Stock, xvi. (1795) p. 11, 

 t. 1. f. 2. Lichenoides gelatinosum otro-virens, awnculatum et r/ra- 

 nomm Dill. Muse. 140, t. 19. f. 24 ^-ii.—Brit.Exs.\ Cromb. n. 106. 



This, as observed by Xylander (Leptoyium Jirmum Lich. Scand. p. 34), 

 resembles L. simintum, 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. 



Hob. On calcareous rocks and walls, rarely on trunks of trees, iu 

 maritime and upland districts. — Distr. Local and scarce in S. and W. 

 England, rare in the W. Highlands of Scotland and in S.W. Ireland. — 

 B. M. : Near Maidstone, Kent ; Shoreham, Beeding, and Lewes, Sussex ; 

 Babbicombe and Plymouth, S. Devon ; Mendip Hills, Somersetshire ; 

 near Cirencester, Gloucestershire. Xear Appin House, Argjleshire. 

 Ardtully, co. Kerry. 



Form mmus Cromb. Grevillea, xv. (1886) p. 12. — Thallus smaller, 

 lacinise narrower, rather longer, when dry somewhat angulose ; 



