LECANORA | LECANORACER 323 
under the name Aspicilia obscurata, and with slightly smaller spore- 
measurements than obtain in the British Museum specimen. 
Hab. On a mica-schistose boulder in alpine situations.—Bb. M, 
Loch-na-Gat, Ben Lawers, Perthshire. 
75. L. exesiocinerea Nyl. in Flora lv. p. 69 (1873).—Thallus 
thickish, unequally cracked-areolate, bluish-grey, whitish or rather 
dark (K —, CaCl —). Apothecia rather small, immersed then 
somewhat prominent, often confluent, the dise becoming plane, 
blackish, the thalline margin entire or somewhat crenulate ; 
paraphyses moniliform-septate and dark-brown above; spores 
18-25 p long, 10-14 p thick ; hymenial gelatine blue then quickly 
wine-red with iodine.—Leight. Lich. Fl. ed. 3, p. 194; Cromb. 
Monogr. i. p. 472. 
Exsice. Johns. n. 272; Larb. Lich. Hb. n. 60; Leight. n. 204. 
Distinguished chiefly by the somewhat suffused-like velvety thallus, 
but otherwise scarcely differing from L. gibbosa, of which it might 
possibly be a growth form. Crombie gives the ascus as 8-spored, but 
occasionally there are fewer. Hue (Nouv. Arch. Mus. Paris, sér. 5, ii. 
p- 29 (1910)) finds larger gonidia and larger cortical cells than in 
LL. gibbosa. 
Hab. On rocks mostly in mountainous districts.—Distr. Rather 
rare throughout the British Isles.—b. M. Roughton and near Penzance, 
Cornwall; Llandyssil, Cardiganshire; Longmynd, Shropshire; Mal- 
vern Hills, Worcestershire; Lamplugh and Wastdale Lake-side, 
Cumberland; Barcaldine, Argyll; King’s Park, Stirling; near Portle- 
then, Kincardineshire; Morrone, Braemar, Aberdeenshire; Kilcully 
near Cork; Kilkee, Clare; Doughruagh Mts., Connemara, Galway ; 
Black Mt., Antrim. 
Form obscurata Nyl. 1. c—Thallus dark- or olive-greyish. 
Apothecia as in the species.—Leight. Lich. Fl. ed. 3, p. 195; 
Cromb. 1. ¢. 
Ezxsice. Leight. n. 175 pro parte; Mudd n. 135. 
Scearcely to be distinguished from the two preceding species, there 
being transition forms in the colour of the thallus. 
Hab. On rocks and boulders in upland and subalpine regions.— 
Distr. Rare in the British Isles —B. M. Malvern Hills, Worcester- 
shire; Caer Caradoc, Shropshire; Cliffrigg, Cleveland, Yorkshire ; 
Reston Sear, Staveley, Westmoreland; King’s Park, Stirling; Ben 
Lawers, Perthshire; Morrone, Braemar, Aberdeenshire. 
76. L. cinereorufescens Nyl. in Not. Siillsk. Faun. & Fl. Fenn. 
Forh. n. ser. v. p. 137 (1866).—Thallus subdeterminate, cracked- 
areolate, pale ash-grey on a black hypothallus (K —, CaCl —, 
medulla I+ blue). Apothecia small or submoderate in size, 
immersed then somewhat prominent, the disc concave then plane, 
brownish or dark-red, the thalline margin entire ; paraphyses 
septate, clavate and brown at the tips; spores ellipsoid, 12-24 
long, 7-16 yp thick.—Cromb. in Grevillea xix. p. 57 (1891) & 
Monogr. i. p. 468. Urceolaria cinereorufescens Ach. Lich. Univ. 
) 
Y “4 
