THE RUSTS OF N(n'A SCOTIA. FKASER. 363 



Necium Farlowii Arth. 



0, I & II. Wanting. 



III. Telia amphigenous, mostly hypophyllons, also com- 

 mon on tlie young twigs and cones, forming compound raised 

 sori on the leaves on the twigs and cones, usually a more or less 

 continuous layer, reddish, waxy. Teliospores in the enlarged 

 epidermal cells closely appressed, oblong or cylindrical, 7-16 

 by 35-90/*; wall pale brown, uniformly thin. Basidiospores 

 spherical, 8-1 1/* in diameter, reddish yellow. 



On Tsuga canadensis (L.) Carr., Pictou. 



The life history of this species was worked out by the 

 writer (see Mycologia 4:182. 1912). The telia that were 

 present on the twigs were found gernlinating on June 14, and 

 well developed telia were collected on July 5. 



The rust was locally abundant in the vicinity of Pictou 

 during the seasons of 1910-11 and did considerable injury 

 to the hemlocks. It was not found elsewhere in the province. 

 It is inconspicuous when occurring on the leaves, but on the 

 twigs it is quite conspicuous as they become swollen and much 

 curved and soon bare of leaves. The affected cones in the early 

 stages of infection are yellow in colour, later they become dark 

 coloured. 



Family 3. CRONARTIACEAE. 



Similar to Melampsoraceae but the telia in columnar, fili- 

 form, wart-like, lens-shaped or cushion-like masses. 



MELA:\IPS0R0PSIS (Schroct.) Arth. 



Aocia with well dfvelopcd peridium. Aeciospores with 

 colourless walls, closely verrucose Avith deciduous tubercules. 

 Uredinia with delicate, "vanescent peridium, sometimes wnnt- 

 ing. Urediniospores formed in chains like aeciospores. 

 Telia erumpent, naked, wixv becoming velvety. Teliosnores 

 in sim|»le or liranched cell-rows. 



