142 



Achillea ptarmka. F. Skaarup (Febr. 62); S. Gammelmose (R 06 cc ^^'0, 

 Eskildstrup; L. Stensgaard. 



Coccomyces. 



515. Coccomyces coronatus (Fries) de Not., Syll. VIII ^■'^ Rehm 

 III '^ 6. '''^ c. icon., Syn: Ascobolus cor. Schum. no 2134 (see R 85 g '='), 

 Phacidium cor. Fries S. M. II "^ Fl. D. tab. 2340 fig. 1, Sclerotium 

 quercinum Schum. Fl. D. tab. 1380 fig. 2, Kronet Lindseplet (H. 37 ""). 



Schroeter considers Leptothyrium castaneae &. quercinum to be its 

 conidial fructification, but Karsten considers it to be Fusicoccum coro- 

 natum, and I (Lind 07 c "^) have described a Ceutospora atra which 

 I consider as related to this species. 



Quite common on fallen leaves of Betula, Fagas, Quercus, Castanea etc., 

 Sept.— Dec. 



516. Coccomyces rubi (Fries) Karst., Syll. VIII "\ Rehm III ", 

 Syn: Phacidium rubi Fries S. M. II =". 



On dead leaves of Rubus idaeus. J. Skovsgaard near Viborg (^^l4 04!). 



Rhytisma. 



The species of this genus develop conidial fructification, called Me- 

 lasmia, in summer; the ripe asci and spores do not occur until the 

 following spring in May. 



Rhytisma salicinum corresponds to Melasmia salicina. 



Rhytisma acerinum — Melasmia acerina. 



Rhytisma punctatum — Melasmia punctata. 



Rhytisma empetri — Melasmia empetri. 



517. Rhytisma salicinum Fries S. M. II ^«^ Syll. VTII "^ Rehm 

 III ^'' c. icon., R 02 a ^^\ Syn: Xyloma sal. Pers., Schum. no 1351, Pilens 

 Rynkeplet (H. 37 "^ R 69 ^^ 80 a ^'^). 



It is common on living leaves of Salix July— Octob., developing the 

 ascomata on the fallen leaves from April— May. 



Noticed on Salix cinerea, caprea, caprea X viminalis, aurita, nigricans, hastata 

 and repens. 



Nic. Hartz has found it on leaves of Salix aurita at "Stokkemarke Torve- 

 lung'' 120 cm. deep in the turf and in interglacial deposits near Eistrup 

 (Hartz 09 ^^S). 



518. Rhytisma acerinum Fries S. M. II =«^ Syll. VIII "^ Rehm 

 III == 6. ''*', R 80 a "= 6. 02 a "" c. icon. Syn: Xyloma acerinum Pers., 

 Schum. no 1352, Lennens Rynkeplet (H 37 '^^ R 69 ^^ 89 a ''^). 



I have found ripe asci and spores in May (see also Klebahn 89). 

 It seems to be chiefly limited to Acer pseudoplatanus on which host 



