ARKIV FÖR BOTANIK. 



BAND 1. 



The resejirclies of Professor H. Marshall Ward 



oil the Brown Rust on the Bromes and the 



My ooplasm Hypothesis. 



By 

 JAKOB ERIKSSON. 



Read May 13, 1903. 



In a series of papers following each other in rapid se- 

 quence, Professor H. Marshall Ward in the University of 

 Cambridge, England, has published the results of the re- 

 searches he has made during the last few years with respect 

 to the brown rust aflpecting different species of the genus 

 Bromus.^ 



I am willing to be the first to acknowledge that by 

 these researches important and interesting contributions have 

 been made to the right understanding of the nature and 

 life-history of the species of fungus in question, and espe- 

 cially of its varying power of attack in regard to different 



' H. Marshall Ward, The Brotnufi and their Brown linst. British 

 Association Report, Glasgow. litOl, p. 836 [The Bromes and their Rust- 

 fungus (Paccinia dispersa). Ami. of i5ot. Vol. 15. 1901, p. 560]. On 

 the (/iiesfion of tfreaisposition» and ^linmunity* in Plants. Proe. of 

 tiu- (!aiiil.ri<lgePhilos. Soc, Vol. 11, Jan. 'JO, IW2. ]>. 307. — On Pure Cul- 

 tures of a Uredine, Puccinia dispersa {Eriks.). Proc. of the Roy. Soe, Vol. 

 69, Febr. W. 1902. p. 451. — Oh the Relations between Host and Parasite 

 in the Bromus and their Brown Rust. Pnceinia dispersa (FJriks.). Ann. 

 of Bot.. Vol. 16. June. 1902, j). 233. Experiments on the effect of mine- 

 ral starvation on the Parasitism of the Uredine Funyus, Puccinia di- 

 spersa, on species of Bromus. Proc. of the Roy. Soc, Vol. 71, Nov. 27, 



1902, p. 138. — Further Observations on the Brown Rust of the Bromus, 

 Puccinia dispersa (Eriks.), and its adoptive Parasitism. Annates Mycolo- 

 gici, Vol. 1, 1903. ]). 132. — On the Histology of Uredo dispersa (Eriks.) 

 and the Mgcoplasm Hypothesis. Pioc. of the Roy. Soc.. Vol. 71, March 12, 



1903. p. 35a. 



Arkiv för Bo t unik. Bd 1. 11 



