274 LICHENACEI. [srrcva. 
exotic variety, cannot be retained for our British form.—-Brit. Evs.: 
Cromb. n. 38. 
Differs from the type chiefly in having the lobes more broadly dilated, 
and approaches var. Canariensis Ach. It is a very interesting British 
form of an exotic lichen, which has not been found elsewhere in Europe. 
In fertile specimens the apothecia are numerous, chiefly marginal, but 
sometimes also sparingly scattered. 
Hab, On shady rocks in maritime and upland districts —Distr. Very 
local, though somewhat plentiful in S.W. Ireland.—B. M.: Turk Cascade, 
Killarney AWonde Cromaglown, co. Kerry ; near Bantry, co. Cork. 
Subgenus PARMOSTICTA Nyl. Flora, 1875, pp. 803, 363.— 
Thallus beneath with pulverulent sorediiform pseudocyphelle ; 
apothecia truly parmeleine (with gonidia present throughout, even 
to the extreme margin of the receptacle). 
2. §. aurata Ach. Meth. (1803) p. 277.—Thallus expanded, 
opaque, or but slightly shining, lobato-divided, reddish-brown or 
red ; beneath shortly tomentose, brownish-black in the centre, 
brownish at the circumference ; lobes sinuato-incised, crenato-undu- 
late, and generally citrino-pulverulent at the margins. Apothecia 
large, subpedicellate when young, marginal or submarginal, dark 
brown, the margin thin, usually inflexed; spores 3-septate, fusi- 
form, brownish, 0,024-28 mm. long, 0,007-8 mm. thick.— Gray, 
Nat. Arr. i. p. 480; Sm. Eng. Fl. v. p. 205; Mudd, Man. p. 90; 
Cromb. Lich. Brit. p. 31; Leight. Lich. Fl. p. 119, ed. 8, p. 112.— 
Lichen auratus Eng. Bot. t. 2359. Lichenoides lacunosum rutilum, 
marginihus flavis Dill. Muse. 549, t. 84. f. 12.—Brit. Hrs. : Cromb. 
n. 39; Leight. n. 261; Larb. Cesar. n. 16. 
The thallus with us is smooth and usually little expanded. The 
pseudocyphellz and the medullary layer are citrine. In this country 
neither apothecia nor spermogones have been detected. 
Hab. On trees, rocks, and heather in maritime localities.— Distr. Local 
and scarce in §.W. England, chiefly in the Channel and Scilly Islands. 
—B.M.: Near the Eperquerie, Island of Sark; Jerboure, Island of 
Guernsey. Near Shanklin, Ryde, and Ventnor, Isle of Wight; coasts 
of Devonshire and Cornwall ; Fresco Island and Bryer Island, Scilly. 
Form subglaucescens Cromb. Grevillea, xv. (1887) p. 76.—Thallus 
pale brownish-glaucous, bright-green when moist ; otherwise as in 
the type. 
Though differing merely in the peculiar colour of the thallus both in a 
dry and wet condition, this must rank as a well-marked form. 
Hab. On the branches of old apple-trees in maritime districts.— Distr. 
Very rare in one locality of S.W. England.—B. M.: The Undercliff, 
Lyme Regis, Dorsetshire. 
48. RICASOLIA De Not. Giorn. Bot. Ital. i. (1846) p.178; Nyl. 
Syn.i.(1860) p.355.—Thallus frondose, lobed or laciniate, very rarely 
