354 FUNGUS-FLOKA. 



contracted when dry, thin, up to 1 mm. across ; disc "black, 

 externally clear greenish-yellow, or sometimes almost 

 sulphur-yellow, pilose, the hairs often arranged in vertical 

 lines, thin- walled, usually continuous, straight, base rather 

 venticose and running out into a long, slender point, faintly 

 tinged yellow, 40-65 X 3-4 /u,, crowded; cortex minutely 

 parenchymatous ; asci small, clavate, apex slightly narrowed, 

 base stout, 8-spored ; spores 2-seriate, elliptic-oblong, con- 

 tinuous, hyaline, 5-7 X 1 * 5-2 fx ; paraphyses very slender, 

 hyaline, cylindrical. 



Peziza melaxantha, Fries, Syst. Myc, ii. p. 97. 



Lachnella melaxantha, Phil., Brit. Disc, p. 266. 



Trichopeziza melaxantha, Sacc, Syll., viii. n. 1772. 



On branches of beech, &c. 



An exceptionally well marked, and distinct species, 

 known at once by the black disc and yellow exterior. 



Specimen in Herb. Berk., Kew, collected by the late 

 Captain Carmichael, accepted as typical. 



Dasyscypha pulverulenta. Sacc, Syll., viii. n. 

 1928. 



Scattered, narrowed into a very short, stem-like base, 

 entirely citron-yellow, thin, J-J mm. across ; externally vil- 

 lose, hairs longest at the margin, thin-walled, serjtate, cylin- 

 drical, obtuse, hyaline, minutely rough with particles of 

 lime, and usually tipped with an amber-coloured mass of 

 resin, 50-80 X 3-4 fx ; asci narrowly clavate, 8 spored ; spores 

 hyaline, smooth, continuous, narrowly elliptical, 5-7 X 1 /x ; 

 paraphyses hyaline, slender, cylindrical. 



Peziza pulverulenta, Lib., Crypt. Arch, n. 125. 



Peziza solfatera, Cke. & Ellis, Grev., vii. p. 7. 



Lachnella solfatera, Phil., Brit. Disc, p. 246. 



Dasyscypha solfatera, Sacc, Syll., viii. n. 1929. 



When fresh the entire fungus is clear lemon-yellow, the 

 resin from the matrix passes up the lumen of the hairs and 

 exudes as an amber-coloured drop at the apex, which hardens 

 when it comes in contact with the air. When these resin - 

 tipped hairs are abundant the exterior of the ascophore is 

 amber-colour, especially near the margin. 



The type specimen of Peziza solfatera, Cke. & Ellis, on 

 examination proves to be identical with Peziza pulverulenta r 



