274 LICHEJfACEI. [STICTA 



exotic variety, cannot be retained for our British form. Brit. Exs. 

 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 Britisl 

 form of an exotic lichen, which has not been found elsewhere in Europe 

 Tn fertile specimens the apothecia are numerous, chiefly marginal, bul 

 sometimes also sparingly scattered. 



Hub. On shady rocks in maritime and upland districts. Distr. Verj 

 local, though somewhat plentiful in S.W. Ireland. B. M. : Turk Cascade 

 Killarney Woods, Cromaglown, co. Kerry ; near Bautry, co. Curk. 



Subgenus PARMOSTICTA Nyl. Flora, 1875, pp. 303, 363.- 

 Thallus beneath with pulverulent sorediiform pseudocyphellae 

 apothecia truly parmeleine (with gonidia present throughout, ever 

 to the extreme margin of the receptacle). 



2. S. aurata Ach. Meth. (1803) p. 277. Thallus expanded 

 opaque, or but slightly shining, lobato-divided, reddish-brown 01 

 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. Apothecu 

 large, subpedicellate when young, marginal or submarginal, darl 

 brown, the margin thin, usually inflexed ; spores 3-eeptate, fusi- 

 form, brownish, 0,024-28 mm. long, 0,007-8 mm. thick. Gray 

 Nat. Arr. i. p. 430 ; Sm. Eng. Fl. v. p. 205 ; Mudd, Man. p. 90 

 Cromb. Lich. Brit. p. 31 ; Leight. Licb. Fl. p. 119, ed. 3, p. 112. 

 Lichen auratus Eng. Bot. t. 2359. L/ichenoides lacunosum rutiluin 

 maryini'ms flavis Dill. Muse. 549, t. 84. f. 12. Brit. Exs. : Cromb 

 n. 39 ; Leight. n. 261 ; Larb. Caesar, n. 16. 



The thallus with us is smooth and usually little expanded. Th< 

 pseudocyphellae and the medullary layer are citrine. In this country 

 neither apothecia nor spermogones have been detected. 



Hob. On trees, rocks, and heather in maritime localities. Distr. Loca 

 and scarce in S.W. England, chiefly in the Channel and Scilly Islands 

 B. M. : Near the Eperquerie, Island of Sark ; Jerbourg, Island ol 

 Guernsey. Near Shauklin, 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 ir 

 the type. 



Though differing merely in the peculiar colour of the thallus both in 

 dry and wet condition, this must rank as a well-marked form. 



Hob. On the branches of old apple-trees in maritime districts. Dislr 

 Very rare in one locality of S.W. England. B. M. : The Undercliff 

 Lyme Regis, Dorsetshire. 



48. EICASOLIA De Not. Giorn. Bot. Ital. i. (1846) p. 178 ; Nyl 

 Syn. i. (1860) p. 355. Thallus frondose, lobed or laciniate, very rareh 



