362 



THE ilUST.S OF XOVA SCOTIA. — FRASER. 



6. Section of telia of Calyptospora columnaris. 

 Teliospores in longitudinal and cross section. 



The aecial stage has never been collected elsewhere in North 

 America. It is probably common but has been overlooked. 



The first collec- 

 tion was on July 

 14, 1909, and it 

 was found to 

 occur rather 

 sparingly over a 

 considerable area 

 during that sum- 

 mer. In 1910 

 collections were made first on June 21 and the aecia soon 

 became common, and in some shaded places were abundant and 

 rather conspicuous on young trees. It was found rather com- 

 mon at the Park, Truro, and also at Oakfield, and doubtless 

 is common throughout the province. 



Using material from Pictou, Arthur (Mycologia 2:231. 

 1910) sowed the teliospores of this rust on Abies Fraseri and 

 the aecial stage developed. European investigators had 

 previously established their connection. (For cultures by the 

 writer see Mycol. 4: 177. 1912). 



The aecial stage can be easily recognized as the spores are 

 orange in colour ami pycnia are absent, and no other 

 Peridermium on Ahies halsamea has these characters. No 

 pycnia are formed, which is rare in the case of heteroecious 

 rusts. 



NECIUM Aith. 



Cycle of development includes telia and possibly pycnia. 

 Telia indehisccnt, forming continuous layers, more or less 

 distinguishable as compound sori. Teliospores oblong or 

 prismatic, apparently one-celled ; wall smooth, slightly coloured. 



The description of the genus is based on Arthur's descrip- 

 tion in the "North American Flora." 



