THE KUSTS OF NOVA SCOTIA. — FRASER. 8tJ5 



Melampsoropsis abietina (Alb. & Sehw. ) Avrli. 

 Chrysomyxa Ledi De Bary. 



0. Pycnia amphigenoiis, numerous, scattered, yellow, 

 becoming reddish-brown, punctiform. 



1. Aecia hypophyllous, on discoloured areas occupying 

 part III- all of a leaf, somewhat in rows, flattened laterally, low, 

 dehiS'Cent at apex; peridium colourless, lacerate, cells abutted. 

 Aeciospores chiefly ellipsoid, 16-22 by 19-30/u.; wall colourless, 

 thick, densely and somewhat coarsely tuberculate. tubercules 

 deciduous ; contents orange-red. 



II. TJredinia hypophyllous, on yellow spots, scattered or 

 grouped, small, yellowish- red or brownish-yellow, roundish, 

 about 130jt* in diameter; peridium delicate. Urediniospores 

 elliptical nr subglobose, 13-20 by 18-33/x; wall colourless; 

 closely and rather finely verrucose. tnl>ereules deciduous; con- 

 tents orange fading to colourless. 



III. Telia hypophyllous, scattered or chiefly grouped on 

 discoloured areas, small, .1-.3 mm., reddish at first. Telio- 

 spores oblong or cuboid, 11-19 by 16-30/*, in a series 70-90ji*; 

 wall C/olourless, thin, ^/mooth ; contents orange-red. fading to 

 colourless. 



Pycnia and aecia on Picea ruhra ( DuHoi ) Dietr.. Pictou. 



TJredinia and telia on Ledum r/roendlandicum Oeder. 

 Pictou. 



The teliospores of this species were germinating freely in 

 the summer of 1910 b;.- lhe second week of .Tnne, the first col- 

 lection being on Tnne 10. Aocia were mafnrc by the 1 7th 

 of July. 



The aocial stage '>■ this rust. Peridcrmiiun ahietinum 

 (A. & S. ) Arth.. has not been recognized elsewhere in Xorth 

 America, though it wa'^ known in Europe on Picea excelsa 

 fLam.) Link. Cultures were made by the writer in 1910 and 

 aecia were produced on Picea ruhra fi'oni a sowing of the 



Pnor, & Trans. N. S. Tnst. .mct.. Vol XII. Tijans. 2.5. 



