LECANORA. ] LECANO-LECIDEET. 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, Braemar, Aberdeenshire. 
18. L. granulosa Nyl. ev 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+ 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 granulosum Mill. Arg. Mém. Soc. Phys. et Hist. nat. 
Genév. xvi. (1862) p. 380. 
Not unlike less developed states of Z. cirrochroa, as observed by 
Miiller Z. e., but differing entirely in the crenulato-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. Qn 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 subdeterminate, thin, entirely pulverulento- 
granulose or occasionally radiato-lobed or crenate at the circum- 
ference, cesio-greyish or greyish-white (K—). Apothecia small 
or submoderate, plane, orange- or tawny-red (K+ 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 arenartum Mudd, Man. 
p. 139. Lichen arenarius Dicks. Crypt. fasc. iv. p. 27.—Lecanora 
cestorufa Sm. Eng. Fl. v. p. 189. Lichen cesiorufus Eng. Bot. 
t. 1040. Rinodina rubricosa Gray, Nat. Arr.i. p. 452.—Brit, Eus.: 
Larb. Lich. Hb. n. 96. 
Easily recognized by the cesio-greyish, subpulverulent thallus and the 
saffron-red colour of the apothecia. The thallus is usually subeffuse, 
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 8. Wales.—B. M.: Strumpshaw, Nortolk; Bury St. Edmund’s, 
Suffolk ; Maidstone, Kent; Fairlight, Hastings, Sussex; Isle of Wight ; 
near Hereford; near Monmouth; Wisbech and Waterbeach, Cambridge; 
near Lydstep, Pembrokeshire. 
