bo 
Or 
bo 
CYCLOCARPINEE [ RINODINA 
>. R. roboris Arn. in Flora Ixiv. p. 197 (1881); Oliv. Exp. 
Syst. Lich. p. 252 (1897).—-Thallus determinate or subeffuse, 
thinnish, continuous and somewhat wrinkled or superficially 
areolate or furfuraceous, whitish or greyish-white (K + yellow) ; 
hypothallus black, visible only occasionally as a narrow black 
line. Apothecia moderate in size or rather large, prominent, 
thickly scattered, the dise blackish, the margin persistent, 
becoming crenulate ; paraphyses septate, irregularly branched 
and brown upwards; spores ellipsoid, 15-18 » long, 6—9 yp thick. 
—Lecanora roboris Dut. ex Nyl. in Mém. Soc. Sci. Nat. Cherb. 
ii. p. 326 (1854); Cromb. in Grevillea xviii. p. 46 (1889) & 
Monogr. i. p. 597. LL. sophodes var. roboris Nyl. Lich. Scand. 
p. 149 (1861); f. roboris Leight. Lich. Fl. p. 225 (1871); ed. 3, 
p. 215. 
Evsiec. Johns. n. 36; Larb. Lich. Hb. n. 260 
Distinguished by the more developed lighter-coloured thallus, by 
the reaction with potash, and by the whitish-margined apothecia. 
Hab, On trunks of trees with rugged bark, rarely on stems of 
heather in maritime and inland localities.—Dzist. Rather common in 
the British Isles except Scotland, where it has not yet been reported. 
—B. M. East Coast of Jersey; D’Ixcart, Sark; Launceston and 
Penzance, Cornwall; Ilsham, Torquay, Devon; New Forest, Hants ; 
Tilgate and Danny, Sussex; Epping Forest, Langford, Maldon, 
Danbury and Thorndon Hall, Brentford, Essex; Savernake Forest, 
Wilts: Harboro’ Magna, Warwickshire; near Worcester; Charnwood 
Forest, Leicestershire ; Yarmouth, Suffolk ; Cwm Bychan, Merioneth ; 
Trefriw, Carnarvonshire; Teesdale, Durham; Felton Woods, North- 
umberland; Leven’s Park, Westmoreland; Calder Abbey, Cumber-- 
land; Carrigaloe, near Cork; Doughruagh Mt., Connemara, Galway. 
On rocks, slates, tiles, ete. 
6. R. confragosa:Koerb. Syst. Lich. Germ. p. 125 (1855).— 
Thallus effuse, generally thickish, warted-areolate, the tubercles 
sometimes rather sparse, greyish or dirty-white (K + yellow), 
hypothallus black, often not visible. Apothecia moderate in size 
or rather small, the disc blackish, the thalline margin prominent, 
becoming crenulate ; paraphyses slender, septate and brown at 
the tips, and slightly enlarged ; spores ellipsoid, 12-23 pw long, 
7-13 p thick.—Parmelia confragosa Ach. Meth. Lich. Suppl. 
p. 33 (18035). Lecanora sophodes var. confragosa Cromb. Lich. 
Brit. p. 49 ee L. confragosa Nyl. ex Lamy in Bull. Pee 
Zot. Hr. xxv. 404 (1878) ; Leight. Lich. Fl. ed. 3, p. 222; 
Cromb. Mosoan: i, p. 397. 
EBusice. Larb. Cesar, n. 28 & Lich. Hb. n. 301, 
Nearly allied to R. roboris, but with a generally thicker, duller 
thallus. The apothecia are numerous and prominent. The plant 
from Fairlight, Hastings, determined by Larbalestier as Lecanora 
mougeotioides (A. L. Sm. Monogr. ii. p. 352), is identical with this 
species, as shown by Larbalestier’s specimen lent by R. Paulson. 
