492 Prof. James W. H. Trail on the [sess. lih. 



with a short stalk ; sporidia ellipsoid with rounded ends, 



15-16 X 7-8 jx, brown, triseptate, usually one or both of the 



middle loculi show a longitudinal septum, as in type. 

 P. media, Niessl, on dead phyllaries of Cirsium heteropliyllum, and 



on dead stems of Oxyria digyna. Jordal. 

 P. dura, Xiessl, on dead stems of Lychnis cliurna. Simodal. 

 P. rubicunda, Xiessl, on dead stems of Ranunculus aconitifolius. 



Simodal. 

 Pryenophora hispida (Niessl), Sacc, on dead stems of Sedum 



annuurii. Odde. 

 Ophiobolus porphyrogonus (Tode), Sacc, on dead stems of 



Aconltum septeutrionale and of LacUica alpina. Between 



Oj fjord and the V0ringfos. 

 O. immersus, Trail, sp. n., on dead stems of Campanula latifolia^ 



in the Simodal. PerWiecia scattered, immersed in fuliginous 



patches in the woody tissues, only a short ostiole appearing ; 



asci 8-spored, cylindrical, 70 x 6 yu, ; sporidia 50-60 x 2 /x, 



pluriguttulate (sometimes appearing pluriseptate), hyaline. 0. 



iynmersus wsis found in stems of Urtica dioica in September 1888. 



Perisporiace^. 



Sphserotheca Castagnaei, Lev., on Geranium sylvaticum, Al- 



cheinilla vuhjaris, and Potentilla Tormentilla. Jordal and 



Simodal. 

 S. Epilobii (Link.), Sacc, on Epilohium. Jordal. 

 Podosphaera tridactyla (Walbr.), De Bary, on Prunv^ Padus. 



Simodal. 

 P. Oxyacanthae (DC), De Bary, on Pyrus Aucuparia. Odde. 

 P. myrtillina (Schubert), Kze., on Vacciyduui Myrtillus, and on 



V. uliginosum. Odde. 

 Erysiphe Martii, Lev., on Hypericum duhiuin and on Galium 



Apariue. Jordal and Vik. 

 E. communis (Walbr.), Fr., on Ranunculus aconitifoUus, R. 



rrptn-i, and Centaurea scahiosa. Odde and Vik. 

 E. Galeopsidis, DC, on Galeopsis Tetrahit. Vik. 

 E. Cichoracearum, DC, on Valeriana officinalis and Verbascum 



niyrujii. Simodal and Ojfjord. 

 Microspheera divaricata (Walbr.), Lev., on Rliamnus Frangula. 



Graven. 

 M. Aim' (DC), Winter, on Alnus incana. Odde. 



Hymenomycetes. 



Corticium incamatum (Pers.), Fr., on dead branches of Corylus 

 Avellana. Vik. 



