72 C0LLE3IACEI. [LEPTOGirM. 



In anatomical structure similar to the preceding species. Externally at 

 once distinguished by the rounded lobes of the thallus, with the margins 

 entire, or occasionally obsoletely and sparingly crenate. The apothecia 

 are usually numerous, and must not be confounded in their younger 

 condition with the spermogones. 



Hab. Among mosses on old walls and boulders, chiefly in maritime 

 and upland tracts. — Distr. Geij^ral and common where it occurs in most 

 of the hilly tracts of Great Britain ; not seen from Ireland. — B. M. : 

 Hoyle Sands, near Penzance, Cornwall ; Chew Mao-na, Somersetshire : 

 near Cirencester, Gloucester;-hire ; Buxton, Derbyshire : Gam, Denbigh- 

 shire ; Lalie Ogwen and Capel Curig, Carnarvonshire : High Force Inn, 

 Teesdale, and near Stanhope, Durliam : Whitehaven, Cumberland ; by 

 the Kent, Westmoreland. Appin and island of Lismore, Argyleshire ; 

 Killin, Ben Lawers. and Blair Atiiole. Perthshire ; Morrone, Braemar, 

 Aberdeenshire. 



Var. /3. sinuatuin Malbr. Eull. Soc. Xat. Eouen, 1866, p. 365. — 

 Thallus smaller, lobes sinuate-incised, laciniate, crisp, the margins 

 depressed, crcuate and denticulate ; otherwise as in the type. — Liy- 

 togium sinnatvm Mudd, Man. p. 47, pro parte; Leight. Lich. Fl. 

 p. 37, pro parte, ed. 3, p. 39, pro parte ; Cromb. Grevillea, xv. p. 13, 

 pro parte. CoUema sinuatvm 8m. Eng. Fl. v. p. 213 ; Tayl. in 

 Mack. Fl. Hib. ii. p. 110. Lathagrium sbmaUnn Gray, Xat. Arr. i. 

 p. 400. Lichen simiatus Huds. Fl. Angl. ed. 2 (1778), p. 635 ; 

 "With. Arr. ed. 3, iv. p. 75 ; Eng. Bot. t. 772. Lk-hen tremeUoklesy 

 Lightf. Fl. Scot. ii. p. 842. Lichenovhs tenne crisptun, fullis parvis 

 depress^ Dill. Muse. 145, t. 19. f. '63.— Brit. Exs. : 'Mudd, n. 6, 

 pro parte ; Cromb. n. 109, pro parte. 



This has been confounded with the t^'pe, though it presents distinctive 

 characters. The smaller thallus, the fonu of the lobes, and their denti- 

 culato-creuate margins probably entitle it to rank as a subspecies. It is 

 often sterile ; the apothecia are numerous when present. 



Hab. On earth-covered mossy walls and rocks in maritime and upland 

 districts. — Distr. Not ver}' general nor common in Great Britain, chiefly 

 in the Vt'. ; rare in S. and W. Ireland. — B. M. : Caistor, Xorfolk ; Stor- 

 rington, Sussex; near St. Lawrence, Isle of Wight; Chagford, DeAon- 

 shire ; Gam, Denbighshire ; Pentregaer, Oswestiy, Shropshire ; AVear- 

 dale and near Stanhope, Durham. Appin, Argyleshire ; Bowling ; Dum- 

 bartonshire ; Killin, Perthshire ; near FoiTes, Elgin. Blarney, co. Cork ; 

 Dunkerron, co. Keriy. 



Form Polinieri Cromb. Journ. Bot. 1874, p. 336. — Thallus pale 

 greenish. Apothecia somewhat scattered ; otherwise as in the type. 

 — Leight. Lich. Fl. ed. 3, p. 30. — CoUema Polinieri Del. ex Nyl. 

 Syn. i. (1858) p. 123. 



Distinguished by the blight green colour of the thallus, which is per- 

 sistent both in a moist and dry condition. The apothecia also are paler 

 and not very numerous. 



Hab. Arnong mosses on shady walls, rarely on rocks, Ln upland situa- 

 tions. — Dis'tr. Very local and scarce in S. England, N. AVales, the S.AV, 

 Highlands of Scotland, and in S. Ireland. — B. M. : Henfield, Sussex; 

 (4ain, D( nbigli.-hire. Ap]iin, Argyle.-hire. Blarnt y, cti. Cork: Blackwater 

 BriHce, CO. K»■rr^ . 



