198 LECANO-LKCIDEEI [bOMBYLTOSPORA 



greyish-wliito oi- -brown (K + brownish, CaCl + pale-yellowish- 

 brown, medulla I — ); hypothallus thin, black. Apothecia small, 

 black, subsessile, plane with a thin entire margin ; hypothecium 

 blackish-brown ; paraphyses slender, dark-brown at tho apices ; 

 spores 1 or 2 in the ascus, ellipsoid or oblong-ellipsoid, at first 

 colourless, becoming brownish-black, muriform, large, often 

 broadly halonate, 0,040-57 mm. long, 0,023-32 mm. thick ; 

 hymenial gelatine deep-blue with iodine. — Bh. Montagnei Plot, 

 ex Koerb. Syst. Lich. Germ. p. 258 (1855) ; Mudd Man. p. 219. 

 Lecidea geminata Flot. ex Nyl. in Ach. Soc. Linn. Bord. p. 375 

 (1856); Cromb. Lich. Brit. p. 87; Leight. Lich. Fl. p. 319; 

 ed. 3, p. 377. 



Hah, On alpine rocks. — B. M. Craig Guie, Braemar, Aberdeen- 

 shire. 



79. BOMBYLIOSPORA De Not. in Massal. Ric. Lich. 

 p. 114 (1852). (PI. 16.) 



Thallus crustaceous. Algal cells Protococcus. Apothecia 

 light- or dark-coloured with a proper margin only; ascus 1- 

 (8-) spored ; spores large, elongate-ellipsoid, colourless or faintly 

 coloured, without a mucilaginous epispore (not halonate), multi- 

 septate. 



The only representative of this genus in the British Isles has a 

 1 -spored ascus. The spermogones have simple sterigmata and 

 cylindrical, straight spermatia. 



1. Bombyliospora Incana A. L. Sm. — Thallus effuse, thickish, 

 glaucous-green when wet, creamy-yellow when dry, granular- 

 leprose (K-f- yellowish, CaCl — ). Apothecia large, adnate, plane 

 or tumid, reddish-brown, the margin obtuse, persistent, paler ; 

 hypothecium brownish ; paraphyses slender, discrete, bright- 

 yellowish-brown at the tips ; spores elongate-ellipsoid, usually 

 7-10-septate, 0,070-160 mm. long, 0,025-35 mm. thick ; hymenial 

 gelatine yellowish, the asci reddish, with iodine. — Lichen incarius 

 Ach. Lich. Suec. Prodr. p. 7 (1798) 1 Sm. Engl. Bot. t. 1683 (1807). 

 Lecidea incana S. F. Gray Nat. Arr. i. p. 470 (1821); Hook. Fl. 

 Scot. p. 38 & in Sm. Engl. Fl. v. p. 181, pro parte ; Tayl. in Mackay 

 Fl. Hib. ii. p. 126? Biatora pachycarpa Fr. Lich. Eur. p. 259 

 (1831). Lecidea pachycarpa Duf. ex Nyl. in Act. Soc. Linn. 

 Bord. ser. 3, i. p. 364 (1856); Cromb. Lich. Brit. p. 75 ; Leight. 

 Lich, Fl. p. 336 ; ed. 3, p. 361. Bomhyliospora pachycarpa 

 Massal. Ric. Lich. p. 115, fig. 226 (1852); Mudd Man. p. 189. 



Sometimes confused with Buellia canescens {Lichen incanus 

 Relhan non Smith) (see p. 166). 



Hab. On the trunks of old trees and on shady rocks in upland 

 wooded districts. — Distr. Only sparingly in a few localities of 

 S. England, N. Wales and S. Ireland. — B. M. New Forest, Hants ; 

 St. Leonard's Forest, Sussex; Ulting, Essex; Cwm Bychan, 

 Merioneth; Dinish Island, Cromaglown, Killarney and Dunkerron, 

 Kerry. 



