305 



in the botanical gardens was passed (R. 04 b ^'^) ; during the eight 

 years which have elapsed since then barberry has Bttle by httle been 

 exterminated, and, as was to be expected, this has had a considerable 

 influence on the attack of Puce, graminis, which is every year confir- 

 med by the annual accounts of the diseases of the cereals (R 05 e '^^ 

 6. R 06 a "^ F. K. R. 07 a 6. 09). Before 1903 the cereals were always 

 attacked by Puce, graminis when August was very rainy and sunshine 

 was wanting thus f. inst. in 1889-94-95-97 &. 1901 (see F. K. R. 

 09). Concerning diseases of the cattle caused by their eating rusty 

 fodder see Oppermann 1879. Concerning the "formae speciales" into 

 which this species may be divided see Er. 6. H. 96 and Er. 00. 



Here I shall only state the host-plants quite summarily; most of 

 them have been found by Rostrup and P. Nielsen. 



St. I on Mahonia aquifolia (rare and thrifty), Berberis brachybotrys, cana- 

 densis (P. N. 76 a^^"), caroliniana, crataegina, cretica, edulis, Guimpelii, hetero- 

 phylla, macvophylla, sanguinolenfa, serotina, sinensis, spathulata, vulgaris. St. 11 

 &. Ill on Aegilops ovata, Agrostis alba, canina, vulgaris, Aira caespitosa, flexu- 

 osa, praecox, Alopecurus pratensis, Avena elatior, fatua, fatua X sativa, orien- 

 talis, sativa, strigosa, Briza media, Bromus arvensis, ramosus, secalinus, Calam- 

 agrostis lanceolata, Cynosurus echinatus, Dactylis glomerata, Festuca arundi- 

 nacea, dertonensis, distans, gigantea, myurus, pratensis, Hordeum arenarium, 

 bulbosum, europaeum, jubatum, maritimum, murinum, sabulosum, secalinum, si- 

 biricum, Lolium multiflorum, perenne, temulentum, Poa Chaixii, pratensis, Secale 

 cereale, Triticum caninum, compactum, durum, junceum X repens, monococcum, 

 polonicum, repens, sativum, spelta, turgidum, violaceum, Weingartneria canescens. 



1417. Puccinia phlei pratensis Er. &. H. 96 "", Syd. 04 ^«^ Timothe- 

 rust (R 02 a ^^^ 6. M. L. M. May 10). 



St. I unknown, st. II may remain viable over winter and thus per- 

 petuate the rust, even without the aid of other forms of spores; the 

 black teleutosori appear Sept.— Nov. upon the stems and sheaths, rare. 

 Was first found in this country by 0rsted (66 ^^) and P. Nielsen 

 (77 a ''). 



Phleum pratense. Common. 



Puccinia rubigo vera de Candolle. 



Puccinia rubigo vera is a common name which was formerly used 

 for quite a long series of different species of Puccinia on Gramineae. 

 From the accounts and descriptions of the more ancient authors it is 

 sometimes to be perceived which species they have been dealing with, 

 but as a rule they have delt with all promiscuously. Puccinia stra- 

 minis Fuckel almost means the same. It is only the excellent investi- 

 gations of Jakob Eriksson and E. Henning which have properly di- 

 stinguished between all the different species, still A. S. 0rsted, P. 

 Nielsen and Rostrup have also assisted. 



J. Lind : Danish fungi. 20 



