259 



vel vix asperulis; promycelio ad septa constricto ibique sporidiola ge- 

 rente ; sporidiolis dein utrinque germinantibus ; cetera Ust. avenae (coll.)- 



It is rather common especially from June to Sept.; P. Nielsen has 

 already made the observation that the form of Ustilago carbo occur- 

 ring on Avena elatior was perennial in the host-plant (P. N. 73 a ''''^, 

 76 b '*^'), it is also common in other countries for instance: Bavaria 

 (All. &. Schnabl: Fungi bavarici 301), Thuringia (Bornmiiller), Bohe- 

 mia (Vestergr. exsicc. no 702), Tyrol (Magnus 05 ^^), Switzerland 

 (Schellenberg 11 ^) etc. 



Is is quite wrong when Clinton (04) and Schellenberg (11 ') state 

 Cintractia avenae Ellis &. Tracy as a synonym of Ustilago perennans 

 Rostrup, they are two well separated species. Ustilago perennans is 

 a naked species with granular episporium; Cintractia avenae has later 

 on been described as Ustilago dura Appel &. Gassner; it is a covered 

 smut with smooth episporium and may, no doubt, also be found in 

 this country on closer investigation. 



Avena elatior. J. Parse (H. Jensen), Viborg!, Horsens!, F. Tiselholt; S. Bid- 

 strup!, Kebenhavn, Tystofte (P. N. 6. P. K. R.), Glaene (E. W.), Fodby; and 

 many other places. 



1255. Ustilago longissima (Sow.) Tul., Syll. VII '^\ Syn: Ust. 

 filiformis (Schrank) Rostrup 90 e "^, Lycoperdon filif. Schrank in 

 Hoppes Bot. Taschenbuch 1793 '^ not Ust. filif. P. Henn., Syll. XVII "", 

 Sedgraessernes Stevbrand (R 93 c), Sadgrasbrand (R 02 a ''°, 04 a '5). 



I consider it very dubious if Uredo culmorum Schum. no 1575 "in 

 culmis foliisque graminum" may be classed under this species as pro- 

 posed by Schellenberg (11 ^'); Schumacher's description may just as 

 well refer to Puccinia graminis or Tilletia striiformis. 



Rostrup made the observation that the cows will become ill after 

 eating hay infected by this smut; the same observation has been made 

 in Sweden (see Er. 00 b, Hedlund 08). Affected plants will seldom 

 produce flowers (R 85 a). 



Glyceria aquatica very common, f. inst. : Uggerby Aa (M. L. M.), Viborg 

 (Gad), P., S., L. Maribo S0 (^/s 70) etc. Glyceria plicata, P. Skaarup. Glyceria 

 fluitans. J. Fredrikshavn ! , Skive!, Sams0 Hjortholm (Exc. ^''/t 87); P. Skaarup; 

 S., L., Meen Rudemark. 



1256. Ustilago grandis Fries S. M. Ill ''\ Syll. VII ''\ Rerbrand 

 (R 02 a 221 £, 04 a ''). 



The mycelium is perennial in the host and prevents its flowering. 

 Arundo phragmites. J. Viborg S0 (Aug. 86 Gad, Sept. 99!), S. 0stre An- 

 Isg (2/8 87 and Dec. 95 O. R. see R 97 m ^s), Vordingborg (Baagae). 



1257. Ustilago Rabenhorstiana Kiihn, Syll. VII ■•". 

 Digitaria glabra, S. Nyraad (Aug. 86 Jeppesen see R 95 a ^oa). 



17* 



