86,8 THE RUSTS OF NOVA SCOTIA. FUASER. 



10-11) by 21-30/x; wall colourless, thin, closely and prominently 

 verrucose with deciduous tubercules; contents orange. 



III. Telia hypophyllous, rather small, ruptured epidermis 

 conspicuous, 130-500/u across, pale orange, inconspicuous. 

 Teliospores oblong, 16-19 by 16-33/x, in a series 60-1 00/x long; 

 wall uniformly thin, colourless, smooth, contents orange-red. 



Pycnia and aecia on Picea mariana (Mill.) BSP., Pictou. 



Uredinia and telia on Chamaedaphne calyculata (L.) 

 Muench., Pictou. 



The teliospores of this rust were germinating by June 13, 

 and aecia were mature by July 17. The telial stage is fairly 

 conspicuous when germinating, but rather inconspicuous before 

 germination. 



Cultures by the writer (Mycologia 3:68, 69. 1911) and 

 field observations showed that Peridermium consimile Arth. 

 and Kern, is the aecial stage. Clinton (Keport Conn. Agr. 

 Exper. Sta., pt. 6 :386. 1907) described infection experiments 

 that led to the same conclusion. 



Melampsoropsis Chiogenis (Dietel) Arthur. 

 Chrysomyxa Chiogenis Deitel. 

 & T. Pycnia and aecia unknown. 



II. Uredinia hypophyllous, scattered, roundish or irregu- 

 lar, flat, honey-yellow; peridium delicate, walls thin, smooth. 

 TJrediniospores catenulate, oblong to linear oblong, 14-21 by 

 22-40^; wall colourless, coarsely verrucose with somewhat 

 deciduous tubercules, medium thick ; contents orange-yellow 

 when fresh. 



TIT. Telia hypophyllous, loosely .scattered, round, small, 

 orange-yellow fading to pale yellow, soon naked, ruptured 

 epidermis noticeable; teliospores broadly oblong or squarish. 

 7-10 by 13-lfi/i'ui a series 30-80/u long; wall colourless, smooth, 

 thin. 



