304 PYRKNOCARPEl [POLYBLASTIA 



11. P. tristicula Th. Fr. torn. cit. p. 14.- Thallus of brown 

 globose or subs(|uaiiiulose scattered granules. Perithecia black, 

 subglobose, moderate in size, with a punctiform, scarcely 

 visible ostiole ; perithecial wall entire, somewhat wrinkled ; para- 

 physes none ; spores usually 2 in the ascus, becoming brownish, 

 muriform, large, 0,060-132 mm. long, 0,021-51 mm. thick; 

 hymenial gelatine wine-red with iodine. — Verrucaria tristicula 

 Nyl. in Flora xlviii. p. 356 (1865) ; Carroll in Journ. Bot. iv. 

 p. 24 (1866); Cromb. Lich. Brit. p. 110; Leight. Lich. Fl. 

 p. 456 ; ed. 3, p. 488. 



Hah. On mosses in mountainous regions. — B. M. Aviemore, Aber- 

 deenshire. 



Spores becoming darJc-hrown. 



12. P. theleodes Th. Fr. torn. cit. p. 10.— Thallus greyish- 

 white, thickish, wrinkled-areolate, with thicker wart-like pro- 

 tuberances, sometimes almost disappearing. Perithecia partly 

 enclosed in the warts or superficial, large, hemispherical with a 

 slight depression round the ostiole ; perithecial wall black, entire, 

 thicker over the top ; paraphyses disappearing ; spores 8 in the 

 ascus, broadly ellipsoid, very large, colourless, then dark-brown, 

 muriform, variable, 0,060-84 mm. long, 0,024-45 mm. thick ; 

 hymenial gelatine wine-red with iodine. — Verrucaria theleodes 

 Sommerf. Suppk Fl. Lapp. p. 160 (1826); Cromb. Lich. Brit, 

 p. 110 ; Leight. Lich. Fl. p. 457 ; ed. 3, p. 489 (inch f. verrucoso- 

 areolata). V. verrucoso-areolata Nyl. in Act. Soc. Linn. Bord. 

 ser. 3, i. p. 438 (1856) & in Maine et Loire Mem. Soc. Acad, 

 iv. p. 36" (1858); Carroll in Journ. Bot. iii. p. 292 (1865). 

 F. suhpyrenophora Leight. Lich. Fl. p. 456 ; ed. 3, p. 486. 

 Lecanora atra var. verrucoso-areolata Schaer. Enum. p. 73 (1850) 

 fide Nyl. Lich. Scand. p. 292 (1861). SpJiserompliale verrucoso- 

 areolata Mudd Man. p. 282, t. 5, fig. 119 (1861). 



The thallus varies considerably in thickness ; sometimes the peri- 

 thecia are sessile and the thallus scarcely visible. There is a distinct 

 thin blackish wall at the base of the perithecia, the upper portion 

 being much thicker and easily breaking away. The spores are often 

 smaller than the size recorded, occasionally not longer than 0,050 mm. 



Hah. On rocks. — Distr. Rather rare in alpine districts of the 

 British Isles. — B. M. Cwm Idwall, Cwm Cywion and Snowdon, 

 Carnarvonshu'e ; Ben Lawers, Perthshire; Achosragan Hill, Appin, 

 Argyll ; Craig TuUoch, Blair Athole, Perthshire ; Craig Guie, Braemar, 

 Aberdeenshire. 



Form inundata Th. Fr. torn. cit. p. 11. — Thallus thin, 

 smooth, somewhat gelatinous. Perithecia semi-immersed in the 

 thallus. — Verrucaria theleodes var. inundata Nyl. ex Carroll in 

 Journ. Bot. iv. p. 25 (1866) ; Cromb. Lich. Brit. p. 110; Leight. 

 Lich. Fl. ed. 3, p. 490 (note). 



Hah. On moist rocks. — Distr. Rare in S.W. Ireland. — B. M. 

 Ballaghbeama, Kerry. 



