124 FUNGUS-FLORA. 



Pezicula rhabarbarina, Sacc, Syll., viii. n. 1295. 



On dead branches of bramble and dog-rose. 



Specimens examined in Libert's Crypt. Ard., Fasc. iii. 

 n. 231 ; Berk., Brit. Fung., n. 271 ; and Cooke, Fung. Brit , 

 ed. ii., n. 656. 



The ultimate cells of the hyphae of the excipulum soon 

 break away and remain as glistening meal ; the pulverulent 

 appearance of the disc is due to the detached subglobose 

 cells forming the tips of the paraphyses, which become free 

 very readily, but remain on the disc. The spores remain 

 continuous for a long time, and as a rule I find only this 

 condition of things, yet I have, at the same time, certainly 

 seen 3-septate spores, and they may probably become more 

 than 3-septate. 



Scleroderris Houghtoni. Mass. (figs. 28-31, p. 91.) 



Solitar} 7 , more frequently caespitose, erumpent ; ascophores 

 at first globose, then turbinate, base often combined into a 

 common stroma, dirty yellow, becoming brown ; disc plane 

 or convex, immarginate, pruinose ; asci broadly clavate ; 

 spores 8, oblong-elliptic, often unequal-sided, greenish- 

 hyaline, 3-guttulate, becoming 2-3-pseudo-septate, 27 x 6-9 /a; 

 paraphyses filiform, branched. 



Dermatea Houghtoni, Phil., Grev., vi. p. 24; Brit. Disc, 

 p. 342. 



JDermatella Houghtoni, Sacc, Syll., viii. n. 2032. 



On dead branches of Portugal laurel. 



The cups break through transverse slits in the bark, 

 forming elongated groups, arising from a common stroma ; 

 within they are cinnamon-yellow. (Phillips.) 



Scleroderris fuliginosa. Karst., Myc Fenn., i. p. 216 ; 

 Eehm, Krypt.-Flora, Disc, p. 210, figs. 3-7, p. 201 ; Sacc, 

 Syll., viii. n. 2459. 



Erumpent, caespitose or gregarious, grouped into broadly 

 effused blackish patches, sessile but narrowed belpw into a 

 stout stem-like base, springing from a thin, blackish stroma 

 which spreads under the cuticle, at first obovate and closed 

 at the slightly depressed summit, then opening by a small, 

 torn mouth; disc greyish- white, externally blackish, naked, 



