456 LICHENACEI. [LECANORA. 
curved, 0,045-50 mm. long, 0,004-5 mm. thick; paraphyses slen- 
der, not well discrete ; hymenial gelatine not tinged, but the thece 
deep-blue with iodine—Cromb. Journ. Bot. 1870, p. 28; Leight. 
Lich. Fl. p. 231, ed. 3, p. 228. 
Presenting much of the habit of the preceding species; this differs 
in the thinner, more leprose thallus, the colour of the apothecia, the re- 
actions of the epithecium and hymenial gelatine, as also in being 
constantly corticolous. The apothecia are scattered, with the thalline 
margin speedily excluded, and become dark-brown in age. In young 
apothecia the spores often appear to be simple, so that they have some- 
times been described as simple or septate. 
Hab. On the bark of old hollies in a wooded upland district.— Distr. 
Only very sparingly in S.W. Iveland.—B, M.: near Derrycuintry, 
Killarney, co. Kerry. 
K. Apothecia at first lecanorine ; spores 8ne, pluriseptate, colourless. 
Spermogones with jointed sterigmata and cylindrical straight 
spermatia. (Hematomma Mass. emend. Koerb. Syst. Lich. 
Germ. (1885) p. 153.) 
152. L. ventosa Ach. Lich. Univ. (1810) 
p. 399.—Thallus determinate, thick, firm,, 
verrucoso-rugose, subareolato-diffract, sul- 
\ 
vA — 
“I < 
phur-coloured or greenish-yellow, rarely 
greyish-white (K—, CaCl—). Apothecia 
moderate, appressed, plane or convex, h 
éb a 
often difform, dark crimson or blood-red 
(K+ violet-purplish); the thalline margin 
thin, usually speedily excluded ; spores 
elongato-fusiform, somewhat curved or con- 
torted, 3-7-septate ; paraphyses not dis- Fig. 66. 
crete; hymenial gelatine deep blue with  Lecanora ventosa Ach.— 
iodine.—Hook. Fl. Scot. ii. p. 48; Sm. f+ TO spores, x50. 
7 A : . Jointed sterigmata 
Eng. Fl. v. p. 189; Tayl. in Mack. Fl. and spermatia, x 500. 
Hib. ii. p. 186; Cromb. Lich. Brit. p. 57; 
Leight. Lich. Fl. p. 283, ed. 3, p. 225.—Hematomma ventosum 
Mudd, Man. p. 157, t. ii. f. 52. Rinodina ventosa Gray, Nat. Arr. 
i. p. 451. Lichen ventosus Linn. Sp. Pl. (1753) p. 1141; Lightf. 
Fl. Scot. li. p. 806; Huds. Fl. Angl. ed. 2, p. 527; Eng. Bot. 
t. 906; With. Arr. ed. 3, iv. p. 16. Lichen gelidus Huds. FI. 
Angl. ed. i. p. 528, Lichenoides tartareum lividum, scutellis rufis 
margine exilt Dill. Muse. 133, t. 18. f. 14.—Brit. Evs.: Leight. 
n.9; Mudd, n. 129; Bohl. n. 36; Dicks, Hort. Sic. v. n. 23. 
A rather fine plant distinguished at once from its allies by the thicker 
verrucose thallus. This is often considerably expanded and varies in 
colour according to the nature of the habitat. The apothecia are 
numerous, often variously deformed, more or less convex, usually biato- 
rine in appearance, the thalline margin being chiefly visible only in their 
