Helotium 147 



58. Helotium Friesii (Weinm.) Sacc. Syll. Fung. 8: 228. 1889. 

 Peziza Friesii Weinm. Hymeno-Gasteromycetes 469. 1836. 



Apothecia short-stipitate, or nearly sessile, reaching a diam- 

 eter of 1-2 mm.; hymenium plane, or convex, pale-yellow, when 

 dry rather deep-yellow; asci clavate, reaching a length of 65-70 /x 

 and a diameter of 5-6 /x, 8-spored; spores slightly clavate, 3-4 X 

 8-9 /x; paraphyses filiform, slender. 



On decaying leaves of Popidus. 



Type locality: Europe. 



Distribution: Iowa; also in Europe. 



Illustrations: Bull. Lab. Nat. Hist. State Univ. Iowa 6: 

 pi. 23, f. 2. 



This was originally reported on dejected leaves of PopuJus 

 Tremula and Betula alba but no spore measurements given. The 

 above description is drawn from Iowa material. Rehm treats 

 this as a doubtful synonym of Helotium foliicolum Schrot. 

 (Schles. Crypt. -Fl. 3-: 82. 1893.) but the spores of that species 

 are 4-5 X 20-24 /x. 



59. Helotium midlandense White, Farlowia 1: 605. 1944. 



Apothecia (described from dried specimens), scattered to 

 subgregarious, usually solitary, more rarely in clusters of three 

 to eight, stipitate, yellow, or yellow-orange, .3-. 7 mm. in diam- 

 eter and about the same height; hymenium plane to patelliform, 

 more rarely slightly convex, yellow, or yellow-orange; stem about 

 equal to the diameter of the apothecium; asci clavate, reaching 

 a length of 45-65 fx and a diameter of 6-7 n; spores 2-seriate or 

 partially so, irregularly ovoid, 2.6-3.2 X 7-10 /x; paraphyses 

 filiform, septate. 



On petioles and larger leaf veins of leaves of Quercus; also on 

 old pods of Gleditsia triacanthos. 



Type locality: Iowa. 



Distribution: Ohio to Iowa and Kansas. 



Illustrations: Farlowia 1: 607, f. 10-13. 



60. Helotium. umbrinum (Kanouse) Seaver, comb. nov. 



Pseudociboria umbrina Kanouse, Mycologia 36: 460. 1941. 

 ?Helotium contortum White, Farlowia 1: 147. 1943. 



Apothecia foliicolous, stipitate, arising from leaf-blades or 

 veins, externally longitudinally striate, dark-brown to brownish- 

 black, reaching a diameter of 1 mm. ; hymenium plane, similar in 



