392 THE RUSTS OF SOV A SCOTIA. — FRASEH. 



the same place, that they were forms of the same species. The 

 eonnection of the different forms was not well known, nor the 

 nomenclature settled at tlie time of Prof. Lawson's collection^ 

 It may he that l»()th collections Ix^long to G. davariaefurme. 



GYMNOCONIA Lageili. 



Aecidia without peridium or enveloping ])araphyses,. 

 dehiscing- irregularly. Teliosj>ores two-celled. 



Only one species is known. It is found in North America: 

 and Europe. 



Qymnoconia interstitialis (Schlect.) Lagerh. 



0. I'ycuia epiphyllous. 



1. Aeeia hypophyllous, occupying the whole surface of 

 the leaf, large, irregular; ])eri(lium ahsent, e]ii(lerinis ruptur- 

 ing irregularly, bright orange at first, a]i])earing waxy. 

 Aeciospores subglobose, elliptical or oblong, 15-27 by 2,5-40/u.;. 

 wall thin, finely verrucose; contents orange, fading to colourless. 



IT. Frediuia wanting. 



III. Telia hyjiophyllous, scattered, on irregular or 

 broAvnish areas, very small, ])ulverulent, black ish-bro^^1■). 

 Teliospores variable, often irregular, u]~)per cell usually 

 triangular, lower quadrangtdar or irregular; wall rather thin, 

 uniform with papillae at germ-pores, smooth, chostnut-l)ro\vn ;. 

 pedicel hyaline, very slender, short, deciduous. 



On Ruhus glnndicaiilis Blanchard, Pictou, Truro. 



This fimgus is common on the species of blackberry named' 

 above. It was not collected on the more common large black- 

 berry which has passed under the 

 name of Iinhns villnsus. One collec- 

 tion of the acfial stage was parasi- 

 tized by a species of TuhercnUna. 

 Teliospores of Gymnoconia In the United vStatcs this rust 



attacks the cultivated raspberries and 

 blackberries and is known as the ''orarge rust." It docs not 

 seem to 1>e trouble-ome in No\-a Seotin. 





