338 



plant and transforming it ("Euphorbia degener"). In May 1880 such 

 diseased plants were sent to P. Nielsen from professor P. Magnus in 

 Berlin and he infected Pisum arvense with them. By cultural experi- 

 ments Rostrup has also confirmed the relation of the Aecidies on 

 Euphorbia cyparissias to the Uromyces pisi (R 84 a ^^). Rostrup made 

 efforts to have the destruction of Euphorbia cyparissias made obli- 

 gatory by law, and a bill to that effect was also passed on March 27. 

 1903. 



Euphorbia cyparissias. F. Skaarup Kirkegaard (^^/s 1872); S. Botanisk Have 

 (A. Lge). Pisum sativum. J. Sj0rup; F. Klingstrup, Skaarup; Meen. 



1570. Uromyces ervj (Wallr.) West., Lit: Sydow 10'«. 



Aut-eu-uromyces. The aecidia are able to regenerate the whole sum- 

 mer (Dietel 95). The uredospores are never to be found in indepen- 

 dent groups, St. Ill Aug.— Septbr. 



Ervum birsutum. J. Tversted Plantage, Skive!, Randers, Stensballe (Jeppe- 

 sen); F. Klingstrup; L. Reersa; B. Neks0 (R 06 dd 3"). 



1571. Uromyces striatus Schroeter, Syn: Uromyces medicaginis 

 falcatae (de C.) Wt., Uredo fabae P. Medicag. falcat. de C, Lucerne- 

 rust (R 02 a"8_ M. L. M. 07), Sneglebselgrust (R 04 a''), Lit: Sydow 

 101". 



Heter-eu-uromyces, st. I perennial in Euphorbia cyparissias, not 

 found in Denmark, st. II— III on Medicago and Trifolium spp. 



Medicago lupulina. S. Korsar (P. N.). Medicago sativa not uncommon. Tri- 

 folium arvense. F. Vejstrup Aaskov. B. (Neger 06). Trifolium procumbens. F. 

 Vejstrup Aaskov Q^ja 78); S. Landbohajskolens Mark. 



1572. Uromyces trifolii (Hedw. f.) Lev., Syn: Uromyces trifohi 

 repentis (Cast.) Liro, Uromyces apiculatus Str. partim. 



Aut-eu-uromyces. St. I— II— III are often found simultaneously. 



Trifolium hybridum. F. Broholm; Thorseng Baekkehave; S. 0resundsh0j (R 

 06 d3«)^ 0rsl0v (F. N.); L. S0llested. Trifolium repens. F. Klingstrup (O. R.); 

 S. Slagelse ! . 



1573. Uromyces fallens (Desm.) Kern 11, Syn: Uromyces trifolii 

 (Hedw. f.) Lev. partim, Uromyces apiculatus Str. partim, Kleverrust 

 (R 82 b =, 02 a "^ 04 a ^»), Lit: Sydow 10 "^ R 93 c ™, Grove 1911. 



Hemiuromyces. St. II July— August. St. Ill Sept.— Dec. Rostrup 

 often emphasises the fact that Trifolium pratense of American origin is 

 always more affected by this rust than clover from Danish seed. 



Trifolium elegans. L. Albuefjord (August 1868). Trifolium fragiferum. J. 

 Horsens!; F. Svenborg; S. Vordingborg; Amager; L. R0dby. Trifolium me- 

 dium. J. Greisdalen. Trifolium pratense. Very common. 



1574. Uromyces loti Blytt, Lit: Sydow 10 i". Grove 1911. 



