388 THE RUSTS OF NOVA SCOTIA. FRASER. 



Arthur in the "North American Flora" places this species 

 in the genus Kuehneola on account of the absence of the aecia. 



Phragmidium speciosum Fr. 



Jtiarlia speciosa (Fr.) Arth. 



0. Pycnia mostly hypophyllous, in groups opposite aecia. 



1. Aecia hypophyllous, petiolicolous or caulicolous, some- 

 times epiphyllous, often developing on the fruit, solitary or in 

 irregular groups, small or occupying considerable areas, up to 

 1 cm. long on the stem, orange ; paraphyses mostly oblong or 

 clavate, usually 8-15 by 40-5 0/x. Aeciospores globose, sub- 

 globose or ellipsoid, 20-25 by 22-35/*; wall pale yellowish, 

 verrucose, contents orange. 



II. Uredinia wanting. 



III. Telia caulicolous or especially fruiticolous, produc- 

 ing swellings on stem and pedicels, large, sometimes 2x1 cm. 

 compact, black. Teliospores cylindrical, sometimes somewhat 

 ellipsoid, 29-33 by 60-1 15/u, usually rounded below, slightly 

 narrowed above, cells 3-9, apex with sub-hyaline papilla; wall 

 brown to black, about 4/u thick ; pedicel hyaline or tinted above, 

 very long, 8-10 times the length of the spore or longer, not 

 swelling in water. 



On Rosa (species not determined), Pictou. 



This rust is very common on the wild roses about Pictou. 

 It attacks especially the pedicels and the fruit, the affected 

 fruit remaining green and not changing to the normal red 

 colour. 



It occurs upon any and all species of roses and is widely 

 distributed in the United States and Canada. Arthur places 

 this species in the genus Earlia, as it differs from the true 

 members of the genus PJiragmidium in the gelatinous pedicels 

 of the teliospores, the large compact telia on the stems and 

 the absence of uredinia. 



