Heleococcum aurantiacum n. gen. et n. spec. 



By 



G. A. Jørgensen. 



In the autumn of the year 1921 Prof. L. Kolderup Rosex- 

 YiNGE observed on a sample, which he had collected in the moor 

 in the botanical gardens of the University of Copenhagen, some 

 small globular perithecia of a fungus he did not know. 



As we did not succeed in finding it mentioned in the myco- 

 logical text-books (Schroeter, Rabenhorst, Clements), the fungus 

 was handed to me for close examination in order to determine 

 it by means of the existing literature on this subject. 



In spite of a careful examination of the species described 

 within the section of the mycology (Plectascineæ-Perisporiales), 

 where the present fungus according to its structure must be refer- 

 red to, I have not succeeded in finding any suitable diagnosis of 

 a genus with which it agrees. 



It seems therefore, that the fungus is not hitherto described, 

 and even if the possibility is not excluded that a suitable diagnosis 

 is to be found somewhere in the literature, I feel justified in 

 describing the fungus as new to science, on the basis of the afore 

 mentioned resultless investigations. 



Heleococcum aurantiacum nov. gen. et n. spec. Perithecia super- 

 ficialia, globosa, 1 l2r~ 1 U mm diam., primo albida, dein aurantiaca, 

 peridio subtile, membranaceo, pseudoparenchymatico, ex 4 — 6 

 stratis cellularibus formato, glabro, areolato, ostiolo nullo, sporis 

 maceratione peridii liberatis; ascis globosis, sessilibus, numerosis, 

 sine ordine collocatis, paraphysibus nullis ; sporis hyalinis, uni- 

 septatis, ellipsoideis, membrana crassiori, glabra, 25- — 30/.« long., 

 10 — 15 ^ lat. (Fig. 1 a, b, c & d). Habitat in solo humido horti 

 botanici Hafniensis. 



Botanisk Tidsskrift. 37. Bind. 27 



