BUELLIA] LECIDEACEiE 1 G9 



immargiiiate ; hypothecium blackish-brown ; paraphyses distinct, 

 thickish, globular and blackish brown at the apices ; spores dark- 

 brown, ellipsoid, with a paler l)rown, roundish cell at each apex, 

 0,020-22 mra. long, 0,009 mm. thick ; hymenial gelatine deep 

 blue with iodine. — Lecidea polospora Leight. in Trans. Linn. Soc. 

 ser. 2, i. p. 241, t. 33, figs. 4-6 (1878), k Lich. Fl. ed. 3, p. 313. 

 Specimen not seen. 



Resembling B. myriocarpa, but distinguished by the peculiar 

 spores which are 3-celled, though described by Leighton as polari- 

 bilocular. 



Hah. On hawthorn. — Distr. Collected b}' Larbalestier at Bally- 

 nahinch, Galway. 



10. B. myriocarpa Mudd Man. p. 217 (1861), (incl. var. 

 punctiformis). — Thai! us efTuse, greenish-grey or blackish, unequal, 

 granular or pulverulent (K •— , CaCl — ), sometimes evanescent. 

 Apothecia minute, plane or convex, with a thin disappearing 

 margin ; hypothecium blackish-brown ; paraphyses discrete, 

 clavate or capitate and dark-brown at the extreme tips ; spores 

 oblong, dark-brown, rarely constricted, epispore distinct, 

 0,009-16 mm. long, 0,004-8 mm. thick; hymenial gelatine deep 

 blue with iodine.— Pa^eZ/ar/a myriocarpa DC. El. Fr. ii. p. 346 

 (1805). Lichen graniformis With. Arr. ed. 3, iv. p. 7 (1796) 

 fide Cromb. in Grevillea xii. p. 57 (1883) (non Hagen). 

 L. piniGola Ach. Prod. Lich. Suec. p. 66 (1798) ; Engl. Bot. 

 t. 1851, fig. 1. Lecidea pinicola Borr. ex Hook, in 8m. Engl. Bot. 

 V. p. 176 (1833). L. myriocarpa Nyl. in Act. Soc. Linn. Bord. 

 ser. 3, i. p. 387 (1856);; Cromb. Lich. Brit. p. 88; Leight. Lich. 

 Fl. p. 307 ; ed. 3, p. 319 ; f. pinicola Leight. /. c. 



Exsicc. Bohl. n. 102, Carroll Lich. Hib. n. 20 ; Mudd nos. 189, 

 190; Leight. nos. 63, 181; Larb. Lich. Hb. nos. 32, 33 

 (f. saproplnla), 34, 69 (f. leprosa) 147, 229, 266, 343, 344 ; Johns, 

 nos. 358, 359, 389, 390 (f. leprosa). 



Externally resembling Lecidea parasema, but with visually smaller 

 apothecia, a character specially emphasized in var. punctiformis 

 Mudd. Spermogonia are somewhat frequent, the spermatia cjdin- 

 drical, curved or undulated, 0,018-23 mm. long, 0,001 mm. thick. 

 The thallus varies from being thin and almost obsolete to more or 

 less granular or pulverulent, and these variations have been described 

 in a number of forms by Leighton. In Lich. Fl. ed. 3, p. 319, he 

 records two forms with an evanescent thallus, f. quercicola found on 

 oaks, and f. saprojiJdla, (non Lecidea parasema var. sapropliila Ach.) 

 on decaying wood, with somewhat larger apothecia. Among saxi- 

 colous forms he distinguishes f. arcolata (in Grevillea v. p. 84 (1876) 

 and Lich. Fl. ed. 3, p. 320), characterized by the minutely cracked-areo- 

 late thallus ; f. leprosa {II. c), in which the greyish thallus has become 

 entirely pulverulent ; also f. ecrustacea and f. opegrajjhina without 

 any visible thallus, the latter further characterized by the apothecia 

 being more or less clustered in lines. B. vernicoma Tuckerm. Gen. 

 Lich. p. 187 (1872) (Lecidea vernicoma Leight. Lich. Fl. ed. 3, p. 321) 

 has been recorded by Larbalestier from Jersey, but the specimens 



