PERTUSARIA | PERTUSARIACE® O13 
Somewhat similar to P. sulphwrea in colour, but differing in the 
habitat and in the constantly furfuraceous thallus. All the specimens 
available for examination are sterile, though fruiting forms have been 
collected on the continent. The spore sizes are quoted from Harmand 
(Lich, Fr. v. p. 1138). He gives the hymenial reaction as CaCl + 
rose. 
Hab. On the trunks of old trees, chiefly oaks.—Distr. Rare in 
S.W. and N. England.—B. M. New Forest, Hants; Hurstpierpoint, 
Sussex; Ockham, Surrey, Epping Forest, Essex; Ickworth Park, 
Suffolk ; Oswestry, Shropshire ; near Battersby, Cleveland, Yorkshire. 
D. Spores usually eight in the ascus. 
Thallus non-sorediate. 
26. P. oculata Th..Fr. Lich. Scand. p. 307 (1871).—Thallus 
effuse, mostly coralloid-papillate, the papille rather slender, 
smooth, rounded at the tips, which are frequently occupied by 
dark-coloured spermogones, white or greyish (K + yellow, then 
reddish). Apothecia immersed in the apices of the papille, the 
disc blackish, the thalline margin tumid, entire ; spores 8 in the 
ascus, ellipsoid, 18-30 » long, 11-14 w thick.—Lichen oculatus 
Dicks. Pl. Crypt. ii. p. 17, t. 6, fig. 5 (1790); With. Arr. ed. 3, 
iv. p. 7. Isidiuwm oculatum Ach. Meth. Lich. p. 140 (1803) ; 
Turn. & Borr. ex Hook. in Sm. Engl. FI. v. p. 232 pro parte & Lich. 
Brit. p. 105 (excl. vars.). Lecanora oculata Ach. Syn. Lich. 
p. 148 (1814); Hook. FI. Scot. ii. p. 47 pro parte; Mudd Man. 
p- 156; Cromb. Lich. Brit. p. 56 & Monogr. i. p. 465 (incl. 
f. depressa) ; Leight. Lich. Fl. p. 200; ed. 3, 173. 
Frequently classified under Lecanora. It looks like a miniature 
form of P. dactylina. It has been impossible, in the absence of 
apothecia in all available specimens, to verify the details as to spores, 
etc. Spermogones are more generally present. 
Hab. On mosses on the ground, rarely on schistose rocks in alpine 
localities.— Distr. Rare on the summits of the Grampians, Scotland. 
—B. M. Craig Calliach and Ben Lawers, Perthshire; Cairngorm, 
Cairntoul and Ben-naboord, Braemar, Aberdeenshire. 
27. P. carneopallida Anzi ex Nyl. in Flora li. p. 478 (1868).— 
Thallus developed under the bark (hypophleodal) in spots, pale 
yellowish (in dried specimens) (K—, CaCl—). Apothecia erum- 
pent, small, not prominent, the disc flesh-coloured, covered at 
first, plane, then somewhat convex and naked with an irregular 
minutely sublobate margin ; spores 8 in the ascus, rather small, 
ellipsoid, 18-32 long, 11-20 p» thick.—Cromb. in Grevillea xii, 
p- 60 (1883) & Monogr. i. p. 507. Lichen cupularis With. Arr. 
ed. 3, iv. p. 22 (1796) (non Ehrh.) pro parte (hab. on trees) 
fide Crombie ll. c.  Lecidea carneopallida Nyl. Bot. Not. 1853, 
p. 183 & Lich. Scand. p. 196, t. 1, fig. 9. 
A Scandinavian plant not unlike Gyalecta carneolutea; it has 
only once been collected in Great Britain. It was first recorded by 
