Mvcological Notes. 



By 

 C. Ferdinandsen and D.Winge. 



The following remarks are divided in two parts, the first (part I) 

 comprises observations respecting a couple af ascomycetes {Pseudovalsa 

 aucta Sacc, Helotium herbarum Fr., Fenestrella fenestrate/, Berk, et Br.); 

 the second (part II) contains a list of such fungi, which we have col- 

 lected last year and found to be new for Denmark (among these some 

 undescribed species). 



I. 

 Pseudovalsa aucta (Berk, et Br.) Sacc. 



In the mycological litterature are cited different conflicting statements 

 regarding the colour and septation of the spores of this fungus, for which 

 reason it is also referred to different genera within the family of the 

 Melanconidaceae. Berkeley and Brown have created the species under 

 the name Sphaeria aucta. From their description is specially pointed 

 out: Spores hyaline, ellipsoidical, with a short appendix at each end, at 

 first 2-locular. The contents of each cell is eventually divided in 2 

 "nuclei", between which a new septum is formed, in such a manner, 

 that the spores either have 1 or 3 septa, in which latter case there is 

 a constriction at each septum. 



In the later litterature the fungus is described by Fuck el (Symb. 

 Myc. pg. 191) as Calospora aucta and by Tulasne (Select. Fung. Carp. 

 II, pg. 152) as Cryptospora aucta. Both of these genera of Melanconi- 

 daceae have hyaline spores. 



In Si/lloge Fungorum II, pg. 138 Saccardo has given a new dia- 

 gnose of the species, the essentially new statement of which is that the 

 fungus is referred to the genus Pseudovalsa, which has brown spores. 



This observation by Saccardo ("Sporidiis . . . uniseptatis . . . hyalinis 

 vel demum fuscescentibus") has not been confirmed by later authors; 

 quite on the contrary are found statements in the opposite direction. 

 Berlese thus writes in the text to his picture of the fungus in icones 

 Fungorum ad Syllogen, that he has only found hyaline, 2-locular spores 



17* 



