Fraser: Cultures of Heteroecious Rusts 179 



237. 1909) has shown by cultures that this rust on Scirpus 

 fluviatilis (Torr.) A. Gray has aecia on Cicuta maciilata. 



A species of Uroniyces on Scirpus validus Vahl. was collected 

 near Pictou. The collection differed from typical Uromyces 

 Scirpi in having the telia embedded in the tissues and placed im- 

 mediately beneath the stomata. The teliospores are also short 

 pedicelled and mostly irregular in shape. Dr. Arthur places this 

 collection under Uromyces Scirpi. Attempts were made to germi- 

 nate the teliospores but without success. 



Uromyces Peckianus Farl. 



Teliosporic material of this rust on Distichlis spicata (L.) 

 Greene collected near Pictou was sown on A triplex patula L. on 

 May 16 with pycnia on May 25 and aecia appearing by May 30. 

 Another sowing was made on June 3 with pycnia on June 10 fol- 

 lowed by aecia which were mature by June 24. A sowing on 

 Cheno podium album L. on June 2 showed pycnia by June 10 fol- 

 lowed by abundant aecia which were mature by June 23. These 

 experiments confirm the work of last year (Mycol. 3 : 72. 1911). 



Two successful sowings were also made on Salic ornia europaea 

 L., but with such scant infection that little value can be placed on 

 the experiments. It is very probable, however, that the aecia on 

 Salicornia belong to this species. The morphology of the aecia 

 support this view. 



Attempts were also made to infect Suedia maritima (L.) Du- 

 mort and Spergularia canadensis (Pers.) Don., but without suc- 

 cess. It seems probable to the writer, however, that the aecia col- 

 lected on Suedia among the rusted Distichlis is connected. 



PUCCINIA PERPLEXANS Plow. 



Teliosporic material of this rust on Alopecurus pratensis L. 

 was collected near Pictou and sowings were made on two plants 

 of Ranunculus acris L. June 2. Pycnia were noticed on both 

 June II and aecia began to appear June 21. The infection was 

 marked on both plants, the leaves, stem and pedicels being 

 infected. 



Aecia developed abundantly in the field on Ranunculus acris L. 



