porina] pyrenulace^ 333 



Perithecia hrightly coloured, waxy ; sjjorca 'S-l -septate. 



1. P. lectissima A. Zahlbr, in Engler & Prantl Pflanzenf. 

 i. 1*, p. 66 (1903). — Thallus pale-olivaceous or reddish-yellow, 

 thin, continuous, subtartareous, effuse. Perithecia small, pale- 

 reddish, semi-immersed, with a rather large ostiole ; perithecial 

 wall reddish, dimidiate ; paraphyses slender, distinct, longer than 

 the asci ; spores 8 in the ascus, fusiform, colourless, 3-septate, 

 0,022-32 mm. long, 0,004-7 mm. thick ; hymenial gelatine not 

 tinged with iodine. — Segestria lectissima Fr. Syst. Orb. Veg. i. 

 p. 287 (1825). Verrucaria irrigua Tayl. in Mackay Fl. Hib. ii. 

 p. 94 (1836); Leight. Angioc. Lich. p. 56, t. 24, fig. 4. V. 

 ruhiginosa Tayl. /. c. ? V. erysihoda Tayl. tom. cit. p. 98 ; Leight. 

 I. c. t. 24, fig. 6. V. lectissima Nyl. in Bot. Not. 1853, p. 181 

 pro parte; Cromb. Lich. Brit. p. 117 (excl. syn. Segestria 

 umhonata) ; Leight. Lich. Fl. p. 443 ; ed. 3, p. 475. V. holo- 

 chrodes Nyl. in Flora lix. p. 311 (1876); Cromb. in Grevillea v. 

 p. 29 ; Leight. Lich. Fl. ed. 3, p. 476. Segestrella lectissiina 

 Mudd Man. p. 284 (1861). 



Exsicc. Larb. Lich. Caesar, n. 49, n. 120 (as Verrucaria holo- 

 chrodes) ; Leight. n. 32 (as V. irrigua var. erysihoda pro parte). 



Easily distinguished by the numerous brightly coloured perithecia ; 

 it has been confused with Lichen thelostomus Sm., but the latter has 

 much larger perithecia and simple spores. 



Hab. On moist rocks. — Distr. Bare in the Channel Islands and 

 S.W. England, more frequent in Wales and in S. and W. Ireland, 

 rare in Scotland. — B. M. La Coupe and Bezel, Jersey ; Dolgelly, 

 Merioneth ; Breiddow, Montgomeryshire ; Cwm Idwyll, Cwm C3"wion, 

 Bettws-y-Coed and Ffridd-du, near Aber, Carnarvonshire ; Ballagh- 

 beama Gap, Crogham, Killarney and Carig, Kerry; Doughruagh Mts., 

 Killery Bay, Connemara, Galway. 



2. P. humicolor A. L. Sm. — Thallus thin, brownish. Peri- 

 thecia scattered or crowded, globose, reddish-brown or blackish, 

 prominent with a slightly beaked ostiole ; perithecial wall entire, 

 reddish-yellow in thin sections ; paraphyses distinct ; spores 8 in 

 the ascus, elongate-fusiform, 3-septate, 0,024-33 mm. long, 

 0,004-5 mm. thick. — Verrucaria humicolor Nyl. in Flora Ix. p. 

 462 (1877); Cromb. in Grevillea vi. p. 114; Leight. Lich. Fl. 

 ed. 3, p. 478. 



Exsicc. Larb. Lich. Hb. without number. 



Hab. On peaty earth and on rocks among li^•erworts. — B. M. 

 Mwellan, Connemara, Galway (the only locality). 



3. P. leptalea A. L. Sm. — Thallus thin, greyish, effuse or 

 brownish and subdeterminate. Perithecia minute, hemispherical, 

 almost superficial, reddish, shining, becoming darker especially 

 round the ostiole ; perithecial wall dimidiate ; paraphyses slender, 

 distinct; spores 8 in the ascus, colourless, 3-septate, 0,016-23 



