THE RUSTS OF NOvA SCOTIA. — FRASER. 



These collections are probably the aecial stage of Puccinia 

 Caricis-Solidagijiis Arth., as field observations indicated that 

 thej belonged to a Puccinia on Carex. 



Aecia were also collected on Solidago latifolia L., which 

 differed from the more common aecia on Solidago being in very 

 small groups or solitary and pale or whitish. They probably 

 belong to a distinct species. 



Peridermium. 



All aecial fonns inhabiting the Pinaceae and Gnetaceae 

 and possessing peridia are usually included under this form 

 genus. They are probably the aecial stages of rusts belonging 

 to the families Melampsoraceae and Cronartiaceae. All 

 Peridermia that have been connected with telial forms belong 

 to these families except a few leaf inhabiting species on Pinus 

 which belong to the genus Coleosporium. 



I have collected ten species in the vicinity of Pictou. They 

 are tablulated below and their connexions with telial genera 

 where known: 



Peridermium decolorans Peck. — Melampsoropsis ledicola 

 (Peck) Arth. 



Per. consimde Arth. & Kern. — Mel. Cassandrae (Peck & 

 Clinton) Arth. 



Per. ahietinum (A. & S.) Thuem. — Mel. abietina (A. & S.) 

 Arth. 



Per. columnare (A. »fc S.) Kunze & Schm. — Calyptospora 

 columnaris (A. & S.) Kuehn. 



Per. elatinum (A. & S.) Kunze & Schm, — Melampsorella 

 elaiina (A. & S.) Arth. 



Per. conorum-Piceae (Rees) Arth. & Kern. — Melamp- 

 soropsis Pyrolae (DC.) Arth. 



Per. PecTcii Thuem. — Pucciniasirum minimum (Schw.) 

 Arth. 



