THfc; RUSTS OF NOVA SCOTIA. — FRASER 



415 



slightly constricted at the septum; wall yellowish-brown or 

 b^o^^Tl , thickened at the apex, smooth; pedicel short, thickened, 

 coloured, persistent. 



Pycnia and aecia on Rhamnus 

 catJiartica L., Pictou. 



Uredinia and telia on Averta sativa 

 L., Pictou. Truro. 



This rust is very common on tJie 

 cultivated oat. It is found chiefly on 

 the leaves. It is much more common 

 in this \'icinity than Puccinia graminis. 

 Both are often found occurring on the 

 same plant, P. I.olii on the leaves, and P. graminis chiefly on 

 the stems and sheaths. 



Culture experiments have shown the following form species : 



1. Avenae on Arena sativa. 



2. Alopecuri on Alopecurus pratensis. 



3. Festucae on Fesiuca elatior. 



4. Lolii on Lolimn perenne. 



5. Glyceriae on Glyceric aquatica. '" ^ 



6. Hold on Holcus lanatus and H. mollis. 



Teliospores of Puccinia Lolii. 



Puccinia coronata Cda. 

 Puccinia Bhamni (Pers.) Wettst. 



k I. Pycnia and aecia on Rhamnus alnifolia. (]S[ot 

 collected). 



II. Uredinia hj-pophyllous, scattered or arranged in line-s, 

 sometimes confluent, small, more or less oblong, pulveiiilent, 

 orange. Urediniospores globose, sub-globose or ovate, 16-24 by 

 20-30i[i, echinulate, yellow, pores 3 or 4, paraphyses pwsent. 



III. Telia hypophyllous or eaulicolous, scattered, some- 

 times in long lines on the stem, sometimes confluent, oblong or 

 linear, covered for a long time by the epidermis, at length 



