THE RUSTS OF NOVA SCOTIA. FRASER. 301 



CALYPTOSPORA Klihn. 



Pycnia rarely seen. Aecia cylindrical, dehiscent at the 

 apex. Peridium colourless. Aeciospores ellipsoid ; wall 

 colourless; contents orange. Telia forming continuous layers 

 of considerable extent, indehiscent. Teliospores 4-celled by a 

 vertical septa, formed in the epidermal cells. 



Only one species is known. The telial stage of it is com- 

 mon in North America and Europe. 



Calyptospora columnaris (Alb. & Schw.) Kiihn. 

 Calyptospora Geoppertinana Kiihn. 



0. Not formed. 



1. Aecia hypophyllous, in two rows 1 , irregular rows on 

 yellowish areas occupying the whole or part of the leaf, 

 cylindrical, slender, about 1 mm. in length, dehiscent at apex; 

 peridium colourless, finely lacerate, cells mostly elongate. 

 Aeciospores broadly ellipsoid or ellipsoid, 12-18 by 18-25/*; 

 wall colourless, thin, closely and distinctly verrucose; contents 

 orange, fading to pale yellow or colourless. 



II. Not formed. 



III. Telia caulicolous, forming a continuous layer around 

 the stem, stems much thickened and often elongated, surface 

 smooth shining reddish-brown, becoming dull. Teliospores in 

 the epidermal cells, closely pressed together, usually 4-celled, 

 oblong or somewhat ellipsoid, 12-20 by 22-40^; wall pale 

 yellowish-brown, smooth, thin, somewhat thickened at the apex. 



Aecia on Abies lalsamea (L.) Mill., Pictou, July 14, 1909. 



Telia on Vaccinium pennsylvanicum Lam., Pictou, Truro. 



The telial stage of this rust is very common about Pictou 

 on Vaccinium pennsylvanicum; it was not found on V. 

 canadense. 



