468° LICHENACEI. [LECANORA. 
165. L. alpina Somm. Suppl. Fl. Lapp. (1826) p. 94; Nyl. Flora, 
1869, p. 4138.—Thallus indeterminate, areolate or areolato-verru- 
cose, greyish or leaden-greyish ; areole rounded or angulose (K + 
yellowish, then reddish, CaCl—, medulla I+bluish); hypothallus 
black. Apothecia immersed or at length superficial, plane, reddish 
or reddish-black; the thalline margin prominent, subpersistent ; 
spores 8ne, ellipsoid or ovoid, 0,009-13 mm. long, 0,006-8 mm. 
thick; paraphyses not discrete, brownish towards the apices; hy- 
menial gelatine deep blue, the thece at length violet or wine-reddish 
with iodine-—Cromb. Grevillea, xix. p. 57, non Leight. Grevillea, i. 
p. 125.—Lecanora cinereo-rufescens Cromb. Lich. Brit. p. 55, 
Leight. Lich. Fl. p. 211, ed. 3, p. 197, is entirely referable to this 
species. 
A well-marked plant differing at once from all states of L. cinerea, 
with which it is so far comparable, in the positive reaction of the medulla 
with iodine. In the single British specimen, which is well fertile, the 
areole are contiguous, though in more northern regions they are often 
discrete, when the hypothallus is more visible. The spermogones have 
the spermatia cylindrical, straight, 0,004~6 mm. long, about 0,001 mm. 
thick, A closely allied species or perhaps only a variety is L. Myrini 
Nyl. Flora, 1869, p. 413 (Parmeli By. Sum. Veg. Scand. (1845) p. 108), 
distinguished chiefly by the yellowish thallus, the black apothecia, and 
the rather shorter spermatia. This is said by Leighton (Lich. Fl. ed. 3, 
. 173) to have been gathered at Barmouth; but the specimen in Hb. 
Salwey referred to in Grevillea, i. p. 125, is from Norway. 
Hab. On a mica-schist rock in an alpine situation.— Distr. Very local 
and scarce on one of the 8. Grampians, Scotland.—B. M.: Ben Lawers, 
Perthshire. 
166. L. cinereorufescens Nyl. Not. Sillsk. pro F. et Fl. Fenn. 
Forh. n. ser. v. (1866) p. 137,—Thallus. subdeterminate, verrucose 
or rimoso-areolate, pale or dark greyish (K—, CaCl—, medulla 1+ 
bluish); hypothallus blackish. Apothecia small or submoderate, 
at first innate and concave, then somewhat prominent and plane, 
brownish- or dark-red; the thalline margin entire; spores 8nex, 
ellipsoid, 0,012-24 mm. long, 0,007-16 mm. thick ; paraphyses sub- 
moderate, brownish at the incrassate apices; hymenial gelatine 
bluish, the thecee wine-red with iodine—Cromb. Grevillea, xix. 
p. 57.— Urceolaria cinereorufescens Ach. Lich. Univ. (1810) p. 677. 
In some respects related to the preceding, but differs, among other 
characters, in the negative reaction of the cortical layer with K. The 
type has not yet occurred with us, but only the following form, 
Form diamarta Nyl. 7. e—Thallus ochraceo-reddish. Apothecia 
with the thalline margin often flexuose.—Cromb. Lich. Brit. p. 55; 
Leight. Lich. Fl. p. 211, ed. 3, p. 197.—Lichen diamartus Wahl. F]. 
Lapp. (1812) p. 414, Lichen sinopicus Eng. Bot. t. 1776 (lower 
magnified fig.). 
