LECIDBA] LECIDBACEjE 13 



0,012-16 mm. long, 0,006-7 mm. thick ; hymenial gelatine wine- 

 red with iodine. — Carroll in Journ. Bot. iii. p. 289 (1865) ; 

 Cromb. Lich. Brit. p. 64 ; I^eight. Lich. PI. p. 251 ; ed. 3, 

 p. 242. 



Easily distinguished from its immediate allies by the squamules 

 being on the tinder surface pale and radiculose, with the radicles long 

 and divided. This character also separates it from the other species 

 of this subsection. The single British specimen seen is but sparingly 

 fertile. 



Hah. On the ground among rooks in an alpine situation. — B. M. 

 Near the summit of Ben Lawers, Perthshire. 



5. L. testaoea Ach. Meth. p. 80 (1803) & Syn. p. 51 (1814).— 

 Thallus appressed, squamulose, greenish- or livid-grey, or greyish- 

 yellow (K — , CaCl — ); sqiiamules rigid, subimbricate, undulato- 

 crenate, white beneath and at the margins. Apothecia moderate, 

 sessile, convex, orange-red or testaceous, whitish within ; para- 

 physes subdiscrete, orange or tawny at the apices ; hypothecium 

 colourless ; spores 8nate, ellipsoid, 0,010-13 mm. long, 0,005-7 mm. 

 thick ; hymenial gelatine bluish then sordid-violet with iodine. — 

 Cromb. in GrevUlea xxii. p. 9 (1893). Psora testaoea Hoffin. PI. 

 Lich. i. p. 99, ff. 5, 6 (1790). Liohen saxifragus Sm. in Trans. 

 Linn. Soc. i. p. 82, t. 4. f. 4 (1791). Lepidoma testaceum S. P. 

 Gray Nat. Arr. i. p. 461 (1821). 



Eesembles a Lecanora of the subgenus Squamaria, near L. crassa, 

 but is a true Lecidea. The apothecia in a very yovmg state are plane 

 with paler margin, but when more advanced become convex and 

 immarginate. The spermogones, not visible in our specimen, are 

 pale, with the sterigmata simple, rarely 2-3-joLnted, and spermatia 

 cylindrical, straight, 0,007 mm. long, 0,001 mm. thick (fide Nyl. in 

 Act. Soo. Linn. Bord. ser. 3, i. p. 350 (1856)). 



Hab. On calcareous rocks in an upland hilly district.- — B. M. 

 Cleve HUl, Somerset (the only locality). 



6 L. glaucolepidea Nyl. in Mem. Soc. Cherb. v. p. 337 (1857) 

 (nomen) ; Carroll in Nat. Hist. Rev. vi. p. 526, t. 32. ff. 2, 3 

 (1859). — Thallus effuse, membranaceous, squamulose, glaucous- 

 green (Kf-|-, CaCl— ); squamules small, somewhat scattered or 

 contiguous, ascending, rounded, inciso-lobed, crenate, and often 

 greyish-sorediate at the margins. Apothecia adnate, moderate 

 or somewhat large, convex, immarginate, reddish-brown or 

 blackish; hypothecium thick, pale-brown; paraphyses conglu- 

 tinate ; spores 8nate, ovoid or oblong, 0,012-16 mm. long, 0,005-7 

 mm. thick ; hymenial gelatine bluish then sordid with iodine.^ — • 

 Cromb. Lich. Brit. p. 63 ; Leight. Lich. PI. p. 251 ; ed. 3, p. 243. 

 Psora glaucolepidea Mudd Man. p. 171, t. 3. f. 62 (1861). 



When sterile might readily be taken for the basal thallus of a 

 Cladonia near 0. deUcata. In this condition as regards colour and 

 mode of growth it resembles Normandina, but differs in the form 

 of the squamules and their sorediiferous margins. The apothecia, 



