72 COLLEMACEI. [LEPTOGIUM. 
Tn 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 gape 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. Geygral 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 Magna, Somersetshire ; 
near Cirencester, Gloucestershire; Buxton, Derbyshire; Gam, Denbigh- 
shire; Lake Ogwen and Capel Curig, Carnarvonshire ; High Force Inn, 
Teesdale, and near Stanhope, Durham ; Whitehaven, Cumberland; by 
the Kent, Westmoreland. Appin and island of Lismore, Argyleshire ; 
Killin, Ben Lawers, and Blair Athole, Perthshire; Morrone, Braemar, 
Aberdeenshire. 
Var. 6. sinuatum Malbr. Bull. Soc. Nat. Rouen, 1866, p. 365.— 
Thallus smaller, lobes sinuato-incised, laciniate, crisp, the margins 
depressed, crenate and denticulate; otherwise as in the type.—Lep- 
togium sinuatum Mudd, Man. p. 47, pro parte; Leight. Lich. FI. 
p. 37, pro parte, ed. 3, p. 39, pro parte; Cromb. Grevillea, xv. p.18, 
pro parte. Collema sinuatum Sm. Eng. Fl. v. p. 213; Tayl. in 
Mack. Fl. Hib. ii. p.110. Lathagrium sinuatum Gray, Nat. Arr. i. 
p. 400. Lichen stnuatus Huds. Fl. Angl. ed. 2 (1778), ‘p. 535; 
With. Arr. ed. 3, iv. p.75; Eng. Bot. t. 772. Lichen tremelloides y 
Lightf. Fl. Scot. ii. p. 842. Lichenoides tenue crispum, foliis parvis 
depressis Dill. Musc. 145, t. 19. f. 33.—Brit. Hxs.: Mudd, u. 6, 
pro parte; Cromb. n. 109, pro parte. 
This has been confounded with the type, though it presents distinctive 
characters. The smaller thallus, the form of the lobes, and their denti- 
culato-crenate 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 very general nor common in Great Britain, chiefly 
in the W.; rare in 8. and W. Treland.—B. M.: Caistor, Norfolk ; Stor- 
rington, Sussex ; near St. Lawrence, Isle of Wight; Chagford, Devon- 
shire; Gam, Denbighshire; Pentregaer, Oswestry, Shropshire ; Wear- 
dale and near Stanhope, Durham. Appin, Argyleshire; Bowling; Dum- 
bartonshire; Killin, Perthshire; near Forres, Elgin, Blarney, co. Cork ; 
Dunkerron, co. Kerry. ; 
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.—Collema Poliniert Del. ex Nyl. 
Syn. i. (1858) p. 123. 
_ Distinguished by the bright 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. Among mosses on shady walls, rarely on rocks, in upland situa- 
tions.— Distr. Very local and scarce in 8, England, N. Wales, the S.W. 
Highlands of Scotland, and in S. Irveland.—B. M. : Henfield, Sussex; 
Garn, Denbighshire. Appin, Argyleshire. Blarney, co. Cork; Blackwater 
Bridge, co. Kerry. 
