436 THE RUSTS OF NOvA SCOTIA. — FRASER. 



. Some Diseases of Rockj Mountain Plants. 



Trans. Iowa Academy of Science, 89-1 1-i. 

 Pock C. H. Svmopsis of the New York Puccinia. New York 



State Museum Report 25: 110-123. (Also 



descriptions and notes in other numbers). 

 Plowright C. B. A Monograph of the British Uredineae. 



London, 1889. 

 Sappin-Trouffy. Recherches histologiques sur la famille des 



uredinees. Poitiers, 1896. 

 Svdow P. et H. Monographia ITredinearum, Vol. I. Genus 



Puccinia, 1904, Vol. II. Genus Uromyces, 



1909 and 1910. 

 Trelease Wm. Parasitic Fungi of Wisconsin. Wisconsin 



Academy of Sciences 6, 1884. 

 Ward H. M. On the Relation between Host and Parasite in 



the Bromes and their Brown Rust, Puccinia 



dispersa Erikss. Annals of Bot. 16: 233- 



315. 1902. 



. Oil the Histology of Uredo dispersa Erikss. and 



the "Mycoplasm" Hypothesis. Phil. Trans. 

 Royal Society of London, Series B., 196: 

 29-46. 1903. 



. Recent Researches on the Parasitism of Fungi. 



Annals of Botany 19: 1-54. 1905. 

 Whetzel & Rcddick. Occurrence of the Aecidial Stages of 



Willow and Poplar Rust in Nature. Science 



32: 805. 1910. 



NOTE. 



Since this paper was revised the writer by culture experi- 

 ments during the early summer of 1912 established the life 

 history of several of the fern rusts of the genus Uredinopsis. 

 These experiments have shown that Uredinopsis Osmundae 

 Magn., U. Struthiopteridis Stormer, U. Phegopteridis Arthur, 



