186 



Mycologia 



tions of Peridermium friictigemim Arth. for comparison, but it 

 seemed to be distinct from the culture aecia. Several collections 

 of aecia were made during the summer of 1910 and 191 1 in vari- 

 ous parts of the province on Tsuga canadensis. These collec- 

 tions were regarded by the writer as Peridium Peckii and the field 

 evidence clearly indicated a connection with Piicciniastruui Myr- 

 tilli on Vaccinium pennsylvanicum and V. canadense. The cul- 

 ture aecia, both field and indoor, of Pucciniastrum minimnin were 

 so much paler in color than the aecia regarded as Peridermium 

 Peckii that the writer was inclined to consider them distinct. 

 Material was sent to Dr. Arthur for determination. He replied 

 that the aecial form from Pucciniastrum minimum was Perider- 

 nium Peckii and the form that seemed to be connected with Puc- 

 ciniastrum Myrtilli was distinct. 



These cultures seem to the writer to prove that the aecia of 

 Pucciniastrum Minimum (Schw.) Arthur are on the leaves 

 and cones of Tsuga canadensis and according to the determina- 

 tion of Dr. Arthur belong to Peridermium Peckii Thiim. 



Uromyces Spartinae Farl. 



For three successive years aecia were collected on Spergularia 

 canadensis (Pers.) Don near Pictou. The aecia seemed to be con- 

 nected with Uromyces Spartinae on Spartina patens (Ait.) Muhl. 

 and vS. glabra var. alterniflora. Attempts were made, in the 

 spring of 1910, to test this supposed connection by cultures, but 

 the teliospores failed to germinate. On June 10, 191 1, aecia were 

 found to occur very abundantly on Arenaria lateriflora L. in sev- 

 eral places, and in each the distribution of the aecia seemed to 

 leave no doubt that they were connected with the Uromyces on 

 Spartina Michauxiana Hitch. As abundant material of this rust 

 on the three species of Spartina common in this region had been 

 collected in early spring for use in culture work and was found 

 to give good germination, experiments were tried to test the sus- 

 pected connection. 



A sowing of teliosporic material from Spartina Michauxiana 

 was made on Arenaria lateriflora on June 11 with pycnia on June 

 17 and aecia on June 27, both in abundance on the young leaves 

 and stem. Another sowing on June 12 gave pycnia on June 18 



