143 



it often occurs in great abundance, especially on young plants planted 

 in a place where the fallen leaves are not removed in winter. On the 

 other hand it is rare on Acer platanoides and campestre even if the 

 trees are close together, and the attack is always weak and scanty (see 

 R 96 o, 97 o). 



Acer pseudoplatanus common. Acer platanoides. S. Rungsted, Geelskov. 

 Acer saccharinum. F. Tange Skov. Acer campestre. L. Stensgaard; Meen Ulfs- 

 hale. 



519. Rhytisma punctatum Fries S. M. II ^es, Syll. VIII '^\ Rehm 

 III '3, R02a"i. 



Acer pseudoplatanus. F. Braendeskov. Acer campestre. F. Assens ! . 



520. Rhytisma etnpetri Fries El. II ™, Syll. VIII "\ Rehm III «^ 

 Krsekling-Rynkeplet (H. 37 «"). 



Empetrum nigrum. J. Knud Mose ('"'/s 74); S. Hornbaek Plantage. 



521. Rhytisma andromedae Fries S. M. II '", Syll. VIII '", Rehm 

 III «^ Andromede-Rynkeplet (H. 37 '"). 



Andromeda poliifolia quite common, noticed from following localities. J. 

 Jerup (M. L. M.), St. Vildmose, Hobro (July 69), Viemose!, Viborg (Gad), 

 Borris Hede (F. G^W. 08); F. Hundtofte; S. Gammelmose, Holmegaards Mose; 

 Falst. Horreby Lyng. 



522. Rhytisma urticae Fries S. M. II "", Syll. VIII '^^ Rehm III '\ 

 This species differs in several respects from Rhytisma and had, no 



doubt, better be transferred to another genus. 



Placosphaeria urticae is regarded as its conidial form. 



On dead stems of Urtica dioeca. J. Horsens!; F. Skaarup (^/a 74), Kling- 

 strup ; S. Dyrehaven (O. R.), Ermelunden etc. 



Hysteriineae. 



Hypodermataceae. 



Concerning the limitation of the genera of Hypodermataceae I agree 

 with Lagerberg (10), who classifies the species furnished with filiform 

 spores of about the same length as asci and quite short perithecia 

 among Lophodermium. The Hypodermella have line-shaped perithecia 

 of various lengths, their asci are clavate containing either four or eight 

 tear-shaped spores which are surrounded by a thick layer of mucilage. 

 Hypoderma have stalky asci and staff-shaped or spindle-shaped spores 

 which will at last become biloculated. 



