LECAXOEA.J LECANO-LECIDEEI. 365 



would then be a variety. The thallus at length becomes indeterminate 

 in consequence of the confluence of several thalli. The apothecia are 

 numerous and crowded ; but the spermogones are not present. 



Hub. On quartzose rocks in a subalpine district. Distr. Found only 

 sparingly in a single locality among the N. Grampians, Scotland. B. M. : 

 Morrone, Braernar, Aberdeenshire. 



18. L. granulosa Nyl. ex Lamy, Bull. Soc. Bot. Fr. t. xxx. (1883) 

 p. 373. Thallus orbicular, closely adnate, minutely diffracto- 

 granulose, shortly subradiate at the circumference, yellow-vitelline ; 

 granules usually crenulate, scattered, or agglomerate, but not con- 

 tinuous (K + purplish). Apothecia small, concolorous (K-f purple), 

 the thalline margin entire, at length subcrenulate ; spores 0,010-16 

 mm. long, 0,006-8 mm. thick. Cromb. Grevillea, xviii. p. 45. 

 Amphiloma granules um Miill. Arg. Mem. Soc. Phys. et Hist. nat. 

 Genev. xvi. (1862) p. 380. 



Not unlike less developed states of L. cirrochroa, as observed by 

 Miiller /. c., but differing entirely in the creuulato-granulose and non- 

 efflorescent thallus. It is only sparingly effigurate at the extreme cir- 

 cumference, with the radii rugose, plane or convex. In the two British 

 specimens seen, the apothecia are but few, with the thalline margin at 

 times evanescent. 



Hab. On calcareous rocks in a hilly district. Distr. Only very 

 sparingly in W. England. B. M. : Cheddar Cliffs, Somersetshire. 



19. L. teicholyta Ach. Lich. Univ. (1810) p. 425 ; Nyl. Flora, 

 1873, p. 197. Thallus subdetermiuate, thin, entirely pulverulento- 

 granulose or occasionally radiato-lobed or crenate at the circum- 

 ference, csesio-greyish or greyish-white (K ). Apothecia small 

 or submoderate, plane, orange- or tawuy-red (K-f deep purple), 

 the thalline margin thickish, undulate, whitish ; spores ellipsoid, 

 0,012-16 mm. long, 0,008-9 mm. thick. Cromb. Grevillea, xviii. 

 p. 45. Lecanora arenaria Cromb. Lich. Brit. p. 46 ; Leight. Lich. 

 Fl. p. 223, ed. 3, p. 212. Callopisma arenarium Mudd, Man. 

 p. 139. Lichen arenarius Dicks. Crypt, fasc. iv. p. 27. Lecanora 

 ccesiorufa 8m. Eng. Fl. v. p. 189. Lichen ccesiorufus Eng. Bot. 

 t. 1040. Rinodina rubricosa Gray, Nat. Am i. p. 452. Brit. Exs. : 

 Larb. Lich. Hb. n. 96. 



Easily recognized by the cffisio-greyish, subpulverulent thallus and the 

 saffron-red colour of the apothecia. The thallus is usually subeff use, 

 forming a loose crust, rarely determinate and slightly radiating at the 

 circumference. It is at times almost entirely evanescent, when it is 

 Lichen arenarius Pers. in Ust. Ann. vii. (1794) p. 27. The apothecia, 

 which are innato-sessile, are scattered or occasionally a few congregated. 



Hab. On sandstone rocks and walls, rarely on bricks, in maritime and 

 lowland districts. Distr. Local and scarce in S.E. and W. England, 

 and in S. Wales. B. M. : Strumpshaw, Norfolk ; Burv St. Edmund's, 

 Suffolk; Maidstone, Kent; Fairlight, Hastings, Sussex; Isle of Wight; 

 near Hereford; near Momnouth ; AVisbech aud "Waterbeaoh, Cambridge; 

 near Lydstep, Pembrokeshire. 



