322 PYRENOCARPEI [aRTHOPYRENIA 



Lich. Germ. p. .'570(1855)). Verrucaria Lahurni JjQight. Lich. 

 Fl. p. 435 (1871) ; ed. 3, p. 465. 



Exsicc. Leight. n. 254; Mudd n. 291. 



Easily confused with A. rhyponta ; it differs in the narrower, 

 2-celled spores. 



Hah. On laburnum and other trees. — Distr. Rare throughout the 

 British Isles. — B. M. Cirencester, Gloucestershire; Ayton, Cleveland, 

 Yorkshire ; Trefriw, Carnarvonshire ; Aberfeldy, Perthshire. 



11. A. microspila Koerb. Parerg. Lich. p. 392 (1865). — 

 Thallus forming dull black filmy or roughish spots on the bark. 

 Perithecia minute, black, prominent, hemispherical, slightly 

 papillose above ; perithecial wall entire with a thin wall under 

 the base ; spores colourless, linear-oblong, 1 -septate, small, 

 0,013-17 mm. long, 0,003-5 mm. thick, or sometimes a little 

 longer. — A. rhyponta Mudd Man. p. 303 (1861) (non Massal.). 

 Verrucaria rhyponta Borr. in Engl. Bot. Suppl. n. 2597, fig. 2 

 (1829) (non Ach.) ; Hook, in Sm. Engl. Fl. v. p. 150 (excl. syn. 

 Ach.) ; Tayl. in Mackay Fl. Hib. ii. p. 89 ; Leight. Angioc. Lich. 

 p. 37, t. 16, fig. 1 ; var. rhypontella Nyl. in Flora 1. p. 374 

 (1867) ; Cromb. /. c. F. capnodes Nyl. in Flora ]. p. 330 (1867) ; 

 Lindsay in Quart. Journ. Micros. Sci. ix. p. 351 (1869) ; Cromb. 

 -Lich. Brit. p. 120; Leight. Lich. Fl. p. 438; ed. 3, p. 468; 

 var. rhypontella Leight. Lich. Fl. p. 439 (1871); ed. 3, p. 468. 



Confused with A. rhyponta, but differs in the rougher more felted 

 thallus, the form and size of the spores and the habitat, it being often 

 found growing on the thallus of Gr aphis sp. 



Hab. On bark, associated with, or growing over, Gi'aphis sp. — 

 Distr. Rare in S. and N. England and S. Ireland. — B. M. Sussex ; 

 Castle Bernard Park, Cork ; Armagh. 



12. A. Taylori Mudd Man. p. 302 (1861).~Thallus dark- 

 brown, thin, forming irregular determinate spots. Perithecia 

 black, minute, numerous, globose- conical, immersed at the base, 

 the ostioie minutely papillate ; perithecial wall entire, black ; 

 paraphyses free, slender ; asci elongate-clavate ; spores colourless, 

 fusiform, 1 -septate, constricted, the cells usually with two or 

 more guttulse, 0,025-30 mm. long, 0,004-5 mm. thick ; hymenial 

 gelatine yellow, the spores brown with iodine,— Ferrwcana 

 Taylori Carroll ex Nyl. in Maine et Loire Mem. Soc. Acad. iv. 

 p. 82 (1858) ; Cromb. Lich. Brit. p. 120 ; Leight. Lich. Fl. p. 438 ; 

 ed. 3, p. 467. 



Exsicc. Carroll Lich. Hib. n. 29. 



Hah. On trees, chiefly ash or oak. — Distr. Rare in S.W. England. 

 Not uncommon in S. and S.W. Ireland. — B. M. Torquay, Devon ; 

 Glenbower Wood, Dunscombes Wood, Castle Bernard Park and 

 Rostellan, Cork ; Dinish, Killarney and Valentia Island, Kerry ; Clare 

 Glen, Tipperary. 



13. A. aphorisasa A. L. Sm. — Thallus indicated by brownish- 

 black detached well-defined spots. Perithecia black, almost 



