294 



Mycologia 



tion of the aecia on Actaea rubra (Ait.) Wild, with Puccinia 

 Clematidis (DC) Lagerh on Hystrix patula Moench. and also 

 show that Elymus canadensis L. and E. virginicus L. are con- 

 genial hosts. 



Further experiments were made at Saskatoon, conducted by 

 Miss Hulda Haining, with aecia collected at Brandon, Man., on 

 Thalictrum dasycarpum Fischer & Lall. Inoculations were 

 made on the following grasses grown from seed in the green- 

 house : Bromus ciliatus L., B. latiglumis (Shear) Hitchk., Elymus 

 canadensis L., E. virginicus L., Agropyron rep ens (L.) Beuv., 

 A. Smithii Rydb., A. tenerum Vasey, A. Richardsonii (Trin.) 

 Schrad, and Hordeum jubatum. L. Bromus ciliatus and lati- 

 glumis were heavily infected and uredinia and telia developed 

 abundantly. Elymus canadensis and E. virginicus were also 

 heavily infected, but the others showed no infection. On Bromus 

 the teliospores were of the many-celled type, on Elymus they were 

 of the ordinary two-celled kind. It seems probable that the 

 plants of Thalictrum used in the cultures contained a mixture 

 of aecia of two races, one infecting Bromus and producing multi- 

 cellular teliospores, and the other Elymus with the two-celled type 

 of teliospores, as was indicated by the experiments in 1918. (See 

 under Puccinia Agropyri E. & E. Mycologia 11: 131. 1919.) 

 Puccinia Impatientis (Schw.) Arth. 



Inoculations were made in the greenhouse at Saskatoon with 

 aeciospores from aecia collected at Dauphin, Man., on Impatiens 

 biflora Walt, on the following grasses grown from seed in the 

 greenhouse: Agropyron Smithii, A. tenerum, A. Richardsonii, 

 Hordeum jubatum, Elymus canadensis, E. virginicus, and Triti- 

 cum vulgar e. There was a slight infection of A. tenerum, A. 

 Richardsonii, and Hystrix patula and rather heavy infection of 

 Elymus canadensis and E. virginicus and heavy infection of Hor- 

 deum jubatum. Three inoculations were made on Hordeum 

 jubatum and heavy infection resulted in each case. (See Myco- 

 logia 11: 131. 1919.) 



Inoculations were also carried out at Macdonald College by 

 Miss Margaret Newton with aecia on Impatiens biflora Walt, 

 collected at Hudson, P. Q., on the following grasses grown from 



