bdbllia] lbcidbaceje 1 69 



immarginate ; hypothecium blackish-brown ; paraphyses distinct, 

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

 brown, ellipsoid, with a paler brown, roundish cell at each apex, 

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

 blue with iodine. — Lecidea jpolospora 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. 



Eesembling B. myriocarpa, but distinguished by the peculiar 

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

 bilocular. 



Eab. On hawthorn. — Distr. Collected by Larbalestier at Bally- 

 nahinch, Galway. 



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

 punctiformis). — Thallus effuse, 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. — Patellaria myriocarpa DC. PI. 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. pinicola Ach. Prod. Lich. Suec. p. 66 (1798) ; Engl. Bot. 

 t. 1851, fig. 1. Lecidea pinicola Borr. ex Hook, in Sm. 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 ; i. pinicola Leight. I. c. 



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

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

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

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



Externally resembling Lecidea jparasema, but with usually smaller 

 apothecia, a character specially emphasized in var. jjunctiformis 

 Mudd. Spermogonia are somewhat frequent, the spermatia cylin- 

 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. saprophila (non Lecidea pwrasema var. saprophila Ach.) 

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

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

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

 late thallus ; f. leprosa (II. c), ia which the greyish thallus has become 

 entirely pulverulent ; also f. ecrustaeea and f . opegraphina 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 



