LECANORA| LECANORACEX 273 
granules ; spores ellipsoid, 12-18 p long, 6-8 » thick ; hymenial 
gelatine blue with iodine.-—Cromb. in Grevillea xii. p. 60 (1884) 
& Monogr. i. p. 417. Lz. subfusca f. intumescens Stizenb. in Bot. 
Zeit. xxvi. p. 893 (1868) ; Leight. Lich. Fl. p. 202 ; ed. 3, p. 186. 
Lichen pallidus Dicks. Pl. Crypt. fase. ii. p. -19 (1790) (non 
Schreb.). Parmelia intwmescens Rebent. Prodr. Fl. Neom. p. 301 
(1804). 
Exsice. Dicks. Hort. Sicc. fase. ix. n. 23; Johns. n. 318. 
Distinguished chiefly by the tumid white margins of the apothecia, 
when these are crenulate, they are somewhat like the fruits of 
IL. rugosa. Spermogones have the spermatia up to 30 p long (fide 
Crombie Monogr. i. p. 417). 
Hab. On smooth bark of trees in wooded maritime and inland 
districts —Distr. Rather rare in England and Scotland and S.W. 
Ireland.—B. M. Ullacombe, Bovey Tracey, Devon; New Forest, 
Hants; Shiere, Surrey ; Cirencester, Gloucestershire; Rhiwgreidden, 
Merioneth; New Galloway, Kirkcudbrightshire ; Barcaldine, Argyll; 
Finlarig, Killin and Craig Calliach, Perthshire; Morrone, Braemar, 
Aberdeenshire; Loch Linnhe, Invernessshire; Tervoe, Limerick. 
16. L. chlarotera Nyl. in Flora lv. p. 550 (1872) note.— 
Thallus determinate or subdeterminate, thickish, finely warted- 
granulate, sometimes cracked-areolate, whitish or greyish (K + 
yellow). Apothecia moderate in size or rather large, the disc 
generally plane or irregular, pale-reddish ; the thalline margin 
thick, crenulate or flexuose; paraphyses slender, septate, with 
long and often bent colourless tips, the epithecium granular, 
brown ; spores ellipsoid or oblong, small, 9-11 » long, 7-9 p» 
thick ; hymenial gelatine blue with iodine.—Leight. Lich. FI. 
ed. 3, p. 182 ; Cromb. Monogr. i. p. 417. 
Exsicc. Johns. n. 261. 
The thickish pale warted thallus and the pale-reddish apothecia 
distinguish this species from others of the swbfusca group. In the 
British specimens the apothecia are rather large and irregular and 
occasionally pruinose owing to the abjointed tips of the paraphyses. 
Hab. On trees in upland districts—Distr. Rare in N.E. England, 
W. Scotland and 8. Ireland.—B. M. Northumberland; Glen Creran, 
Barcaldine, Argyll; Letterfrack, Connemara, Galway. 
17. L. campestris B. de Lesd. Lich. Dunk. p. 162 (1910).— 
Thallus often limited by a whitish hypothallus, continuously 
warted-granulate or granular-areolate, whitish or cinereous-grey 
(K + yellowish). Apothecia scattered or generally crowded, 
especially towards the centre of the thallus, moderate in size, 
plane, becoming somewhat convex, brown or reddish-brown when 
wet, or darker when dry, the thalline margin thin, mostly entire 
but sometimes more or less crenulate ; paraphyses more conglu- 
tinate in old specimens, slender, distinctly branched and septate, 
variously clavate and brown at the tips ; spores ellipsoid, 9-15 pu 
long, 6-8 p» thick ; hymenial gelatine blue, the asci faintly wine- 
I. ay 
