258 FUNGUS-FLOE A. 



On dead, fallen leaves of beech, maple, &c. 



The species is very minute, and attached to the veins on 

 the underside of the leaf. Distinguished from allies by the 

 very small, narrow cells of the excipulum. 



Specimen in Desm., Cr. Fr., ser. i., n. 1159, examined. 



Helotium phyllogenon. Eehm, Hedw., 1885, p. 14. 



Scattered, pear-shaped and closed at first, becoming 

 gradually expanded and ultimately plane, disc yellow, ex- 

 ternally almost white, J— 1 j mm. across, stem slender. 

 1-1 • 5 mm. long; excipulum parenchymatous, hyaline, cells 

 usually hexagonal but very much elongated radially, so as 

 to become almost oblong in form, 14-24 x 8-10 //, each 

 row terminating at the margin in a slender filament. 

 30-40 x 3-4 fx. ; asci clavate, base stout, 8-spored; spores 

 hyaline, smooth, irregularly 2-seriate above, narrowly fusi- 

 form, sometimes with the widest part near the apex, ends 

 rather obtuse, usually 2-guttulate, then 1 -septate, straight 

 or slightly curved, 10-15 X 3-3 "5//,; paraphyses hyaline., 

 tips very slightly thickened, about 3 //,. 



Helotium phyllophilum, Eehm, Krypt.-Flora, Disc, p. 796. 



Phialea pnyilogena, Sacc, Syll., viii., n. 1136. 



On the veins of decaying poplar leaves. 



Specimen in Rehm's x\scom., n. 768, examined. 



Quite distinct from IT. pliyllopliilum in the longer, slender 

 stem, and more especially in the very large cells of the 

 excipulum. 



Helotium renisporum. Ellis, Bull. Buff. Soc. Nat, 

 Hist., March, 1875, p. 299. 



Scattered, stipitate, subglobose and closed at first, then 

 expanding until saucer-shaped or almost plane, margin very 

 minutely fimbriate, more or less contracted when dry. 

 2-4 mm. diameter, pale cinnamon or yellowish brown ; ex- 

 ternally marked with delicate wrinkles radiating from the 

 base ; stem 2-4 mm. long, slender, darkest near the base ; 

 hypothecium tinged brown, and with the hyaline excipulum, 

 composed of stout, much interwoven hyphae, cortex pseudo- 

 parenchymatons, cells rather large, irregular, tinged brown : 

 asci cylindrical, apex thickened, 8-spored; spores 1 -seriate, 

 continuous, 2-3-guttulate, elliptic oblong, slightly curved r 



