53 



foliorum innatae, ellipsoideae, long. 20—25 M^, crass. 12—16 1^ pallido- 

 fuscae, pellucidae. (See fig. tab. I). 



Besides in Denmark proper this fungus has been found twice in 

 Greenland (Lind 10 b '^°) and in Iceland (R 03 b ^^^) as well as in 

 Sweden, Belgium and France (see Vgr. 02 ^*'^). 



Fig. 1. Physoderma myriophylli (Rostrup). 

 a and b; Resting spores with their appendicular cells; c and d: Spores germinating with 

 hyphae; e: A spore being about the metamorphosis into sporangium; f: A sporangium 

 exhausting the ripe zoospores; g: An evacuated sporangium; h— 1: Supposed young zoo- 

 sporangia on hyphae, hwich have been developed by vegetative germination of the resting 

 spores (a-1 ™), From F. a W. 09. 



On stems of Hippuris vulgaris. F. Eiby Mose (July 1896 Jak. Lge see R 

 99 a 2"). 



20. Physoderma vagans Schroeter, Syll. VII '^', Syn: Cladochy- 

 trium V. Fisch. IV ^'"'. 



Cicuta virosa (hosp. nov.). J. Non MbIIc (^^/s 04!). 



21. Physoderma menyanthis de By., Syll. VII '^°, Syn: Cladochy- 

 trium men. de By., Fisch. IV ^'', Lit: R 90 e''^^ 



July — August, not uncommon. 



Menyanthes trifoliata. J. Hulsig!, Uggerbyl, Rimmen!, Blaavand (F. K. R.); 



