308 The North American Cup-Fungi 



Apothecia as described above, reaching a diameter of 1 mm., 

 externally ridged the ends of the ridges giving rise to a toothed 

 margin; hymenium brown; asci clavate to cylindric-clavate, 

 reaching a length of 150 ^t and a diameter of 13-16 n, 8-spored; 

 spores irregularly 2-seriate, simple, hyaline, subfusiform to fusi- 

 form, at first symmetrical and larger at one end, 6-10 X 30-47 ju; 

 paraphyses filiform, hyaline at the base, enlarged above and 

 light chestnut brown, 3-5.5 n in diameter, the ends forming an 

 epithecium. 



On various species of Quercus. 



Type locality: North Carolina. 



Distribution: New Hampshire to Missouri, Florida and 

 Alabama. 



Illustrations: Mycologia 21: 245./. J, 2. 



ExsiCCATi: Rav. Fungi Car. 4: 24; Ellis & Ev. N. Am. Fungi 

 2148. 



5. SPHAERANGIUM Seaver, nom. nov. 



Phaeangium Sacc. Syll. Fung. 16: 764. 1902 (in part). Not Phaeangiuni 

 Pat. 1894. 



Apothecia as in Cenangium; asci clavate, 4-8-spored; spores 

 large subglobose, or ellipsoid, at first hyaline, becoming brown; 

 paraphyses forming an epithecium. 



Type species, Dermatea tetraspora Ellis. 



A note in the herbarium of The New York Botanical Garden 

 by H. Rehm states that this species might be the type of a new 

 genus, although no name was suggested. While the genus 

 Phaeangium Sacc. was not founded on this species, it was in- 

 cluded. 



Asci 4-spored. 1. 5. tetrasporum. 

 Asci 8-spored. 



Spores 19-22 X 40-50 /x. 2. S. magnisporum. 



Spores 20 X 26 n. 3. S. Tiliae. 



1. Sphaerangium tetrasporum (Ellis) Seaver, comb. nov. 

 (Plate 132.) 



Dermatea tetraspora Ellis, Bull. Torrey Club 6: 108. 1876. 

 Cenangium tetrasporum Sacc. Syll. Fung. 8: 570. 1889. 

 Phaeangium tetrasporum Sacc. Syll. Fung. 16: 765. 1902. 



Apothecia erumpent but scarcely rising above the surface of 

 the bark, occurring singh', or in cespitose clusters, externally 



