DASYSCYPHA. 329 



Dasyscypha rhytismatis. Sacc., Syll., viii. n. 1886. 



Gregarious, stipitate, entirely white, piriform and closed 

 at first, then expanding until quite plane, about ^ mm. 

 across ; externally villose, marginal hairs longest, delicate, 

 thin-walled, septate, obtuse cylindrical, rough with minute 

 particles of lime, and usually bearing a large, rough, 

 sparkling crystal at the apex, 50-80 x 3-4 /*, the hairs 

 becoming shorter downwards; cortex formed of simple or 

 branching, parallel, septate hyphae, small and elongated in 

 the direction from base to apex, about 58 x 34 p.; stem 

 about ^ mm. long ; asci small, clavate, apex slightly 

 narrowed, 8-spored ; spores 2-seriate, hyaline, smooth, con- 

 tinuous, cyliudric-fusiform, 3-5 X 1 p- ; paraphyses lanceo- 

 late, acute, nearly as long again as the asci, continuous, 4 p. 

 at broadest part. 



Peziza rhytismae, Phil., Grev., viii. p. 101. 



Lachnella rhytismae, Phil., Brit. Disc., p. 250. 



Lachnum echinulatum, Rehm, Krypt.-Flora, Disc., p. 876. 



Dasyscypha echinulata, Sacc., Syll., viii. n. 1848. 



On dead leaves of Acer on Rhytisma acerinum, also on oak 

 leaves. 



Specimen from Phillips examined, also Rehm., Ascom., 

 n. 259. 



Dasyscypha nivea. Mass. 



Gregarious, snow-white, stipitate, at first pyriform and 

 closed, then expanding but not becoming quite plane, 

 epithecium parenchymatous, cells largest at the margin, 

 where they are irregularly polygonal, 6-9 /* broad, slightly 

 elongated radially, becoming longer and narrower down- 

 wards ; externally pilose, hairs longest and most numerous 

 at the fringed margin, cylindrical, apex often slightly 

 clavate, septate, often minutely rough, rarely with a crystal 

 at the tip, 100-150 x 3-4 /A; disc up to 1 mm. across when 

 expanded ; stem cylindrical, slender, pilose, about ^ mm. 

 long ; asci cylindric-clavate, 8-spored, apex rounded, base 

 rather stout ; spores irregularly biseriate, slenderly fusiform, 

 continuous, hyaline, 6-9 x 1-1*5 p.; paraphyses lanceolate, 

 apex acute, about half as long again as the asci, 4-5 /*. broad 

 at the widest part, hyaline. 



Octospora nivea, Hedwig fil., Muse. Frond., tab. viii. fig. B. 



