Helotium 135 



On decaying leaves of Quercus and occasionally on leaves of 

 other kinds. 



Type locality: Europe. 



Distribution: New Hampshire, Massachusetts and New 

 York; also in Europe. 



Illustrations: Farlowia 1: 168,/. 17. 



34. Helotium immutabile Fuckel, Symb. Myc. Nacht. 1 : 50. 

 1871. 



Pachydisca immutahilis Boud. Hist. Class. Discom. Eu. 94. 1907. 



Apothecia scattered, short-stipitate, white when fresh, be- 

 coming yellow to orange when dry, .8 1.5 mm. in diameter; stem 

 .2-.5 mm. long, gradually expanding into the apothecium above, 

 the color as above; hymenium when fresh white, becoming pale- 

 yellow or in old, dried specimens pale-orange to reddish-brown, 

 plane to slightly convex; asci clavate, reaching a length of 80- 

 105 n and a diameter of 8-10 ju. 8-spored; spores 1-seriate to 

 2-seriate, simple, angular-obovoid, 3.8-4.6 X 10-13 n, the con- 

 tents granular, or with a few minute, scattered oil-drops; paraphy- 

 ses once forked below the middle, scarcely enlarged above, 

 reaching a diameter of 3-3.5 ^l. 



On decaying leaves, especially on the veins and petioles of 

 various deciduous leaves. 



Type locality: Europe. 



Distribution: Massachusetts to New Jersey and Minnesota; 

 also in Europe. 



Illustrations: Farlowia 1: 143,/. 3. 



35. Helotium translucens White, Farlowia 1: 149. 1943. 



Apothecia scattered, or subgregarious, stipitate, subfleshy, 

 practically hyaline when fresh, drying to pale-ochraceous, reach- 

 ing a diameter of .4 mm.; stem .3 mm. long, expanding abruptly 

 into the apothecium; hymenium becoming plane and remaining 

 so on drying; asci cylindric-clavate, abruptly narrowed below, 

 reaching a length of 75-95 y. and a diameter of 10-11.5, 8-spored; 

 spores 1-seriate, or becoming partially 2-seriate, obovoid, the 

 contents scarcely granular, 4-4.5 X 12 15 m; paraphyses clavate, 

 3-3.5 M in diameter above. 



On the veins and parenchyma of leaves of Acer sp. and 

 Quercus sp. 



Type locality: Blue Hills near Milton, Massachusetts. 



