ABROTHALLUS— KARSCHIA. 99 



KARSCHIA. Korber. 



Ascophore sessile, superficial, more or less applanate, at first 

 marginate then becoming almost or quite plane and without 

 a margin ; blackish ; excipulum parenchymatous ; waxy, 

 rather horny when dry ; asci clavate, 8-spored, wall thick at 

 the apex ; spores smooth, brown, 1-septate ; paraphyses sep- 

 tate, apex thickened and coloured; hypothecium thick, 

 mostly coloured. 



Karschia, Korber, Parerg. Lich., p. 459 ; Rehm, Krypt.- 

 Flora, Disc, p. 345; Sacc, Svll., viii. p. 779. 



Patellaria, Phillips, Brit. Disc, p. 360. 



Karschia lignyota. Sacc, Syll., viii. n. 3200 ; Eehm, 

 Krypt.-Flora, Disc, p. 346, fig. 1-5, p. 299. 



Ascophores mostly scattered, sessile, circular, at first closed, 

 then expanding and marginate, finally almost or quite plane 

 and without a raised margin ; excipulum parenchymatous, 

 cells small, olive-green ; blackish-olive then almost or quite 

 black ; waxy, horny when dry ; up to 1 mm. across ; asci 

 clavate, apex rounded and with the wall thickened, 8-spored ; 

 spores elliptic-oblong, smooth, brown, 1-septate, the upper 

 cell slightly wider than the lower one, slightly constricted at 

 the septum, 9-12 x 4—5 /a; paraphyses septate, branched, 

 slightly thickened, and brown at the apex; hypothecium 

 pinkish-brown . 



Patellaria lignyota, Fries, Syst. Myc, ii. p. 150; Phil., 

 Brit. Disc, p. 360. 



Patellaria Stricheri, Sacc, Fung. Ital., f. 1411. 



Karschia nigricans, Eehm, Asc, n. 21. 



Arthonia melasjoermella, Kyi., Flora, 1865, p. 605; Leighton, 

 Brit. Lich.-Flora, p. 416. 



On old decorticated wood. 



Specimen from Fries examined. 



Karschia Bloxami. Sacc, Syll., viii. n. 3208. 

 Ascophore sessile, fixed by a point, applanate, about § mm. 

 across, gregarious, at first with a very delicate margin, then 

 plane or convex and immarginate, black; excipulum paren- 

 chymatous, cells small, blackish-olive with a tinge of red 



h 2 



