356 THK RUSTS OF NOVA SCOTfA. — FRASER. 



Pucciniastrum Agrimoniae (Sehw.) Tranz. 

 & T. Pyonia and aecia iniknown. 



TT. Frcdinia hypophyllous, thickly scattered over definite 

 or extended yellowish areas, bnllate, ronnd, small, orange- 

 yellow, dehiscent by a central ])oro; ]')cridinm rather delicate, 

 heniisj^herieal. cells small, cnhoid. ITrediniospores broadly 

 obovate or globoid. 12-16 by 15-23iu.; wall hyaline, rather thin, 

 finely echinnlate ; contents orange-yellow, fading to ])ale yellow. 



III. Telia h])vo])hyllons. forming scattered, irregular 

 patches, indehisccnt. Teliospores intercellular, beneath the 

 epidermal cells, oblong or somewhat cvlindi'ieal. 18-30 by 

 19-32/x; wall smooth, brOAvnish-yellow ; contents colourless. 



On Agrimonia grynosepala Wallr., Ne-sV Glasgow% Truro. 



This species was collected only near New Glasgow, but 

 there was a rich development on the plants infected. The 

 telia can be easily recognized when the leaves have been killed 

 by the frost as small dark brown patches on the under side of 

 the leaves. They are late of being formed and only in late 

 collections will telia be found. Search was made on the 

 neighbouring conifers in the spring for the aecial stage, but 

 without success. Nothing whatever is known of it, but as 

 Pucciniastrum puslulaimn has aecia on Ahies in Europe, this 

 species may have like aecial hosts. 



UREDIXORSIS Magn. 



Cycle of development not understdod ; telia and two other 

 spore forms known, called aecia and uredinia. 



Aecia small, bullate, roundish, indehiscent. Peridium 

 depressed globoid, delicate. Aeciospores borne singly on ])edi- 

 cels, obovat« to globoid, angular or polyhedral; wall colourless, 

 medium thick, minutely verrucose. 



Uredinia bullate, roundish, usually larger than aecia, 

 dehiscent by central rupture, spores ejected in a long white 

 filament ; peridium delicate, ITrediniospores borne singly on 



