456 L1CHENACEI. [LECANOKA. 



curved, 0,045-50 mm. long, 0,004-5 mm. thick ; paraphyses slen- 

 der, not well discrete ; hymenial gelatine not tinged, but the thecae 

 deep-blue with iodine. Cromb. Journ. Bot. 1870, p. 28 ; Leight. 

 Lich. Fl. p. 231, ed. 3, p. 223. 



Presenting much of the hahit 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. 



Hub. On the bark of old hollies in a wooded upland district. Distt\ 

 Only very sparingly in S.W. Ireland. B. M. : near Derrycuintry, 

 Killarney, co. Kerry. 



K. Apothecia at first lecanorine ; spores 8nse, pluriseptate, colourless. 

 Sperraogones with jointed sterigmata and cylindrical straight 

 spermatia. (Hcemdtomma Mass, emend. Koerb. Syst. Lich. 

 Germ. (1885) p. 153.) 



152. L. ventosaAch. Lich. Univ. (1810) 

 p. 399. Thallus determinate, thick, firm, 

 verrucoso-rugose, subareolato-diffract, sul- 

 phur-coloured or greenish-yellow, rarely 

 greyish-white (K , CaCl ). Apothecia 

 moderate, appressed, plane or convex, 

 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. PI. Scot. ii. p. 48; Sin. - Two spores, x 350. 

 -r< TM -i or rn i tr i -ni " Jointed sterigiimtu 



Lng. Fl. v. p. 189; Tayl. in Mack. Fl. aD d spermatia, x500. 

 Hib. ii. p. 136 ; Cromb. Lich. Brit. p. 57 ; 



Leight. Lich. Fl. p. 233, ed. 3, p. 225. ff&matomma ventosum 

 Mudd, Man. p. 157, t. ii. f. 52. Rinodina ventosa Gray, Nat. Arr. 

 i. p. 451. Lichen ventosus Linn. Sp. PI. (1753) p. 1141 ; Lightf. 

 Fl. Scot. ii. p. 806; Huds. Fl. Angl. ed. 2, p. 527; Eng. Bot. 

 t. 906; With. Arr. ed. 3, iv. p. 16. Lichen cjelidus Huds. Fl. 

 Angl. ed. i. p. 528. Lichenoides tartareum livirlum, scutellis rufis 

 margine exili Dill. Muse. 133, t. 18. f. 14. Brit. Exs. : 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- 

 riue in appearance, the thalline margin being chiefly visible only in their 



