1920] The Lower Basidiomycetes of North Carolina 117 



and branches, or less often on trunks, from sears 

 on which arise globular or wedge-shaped, often 

 confluent and irregularly-diffused masses of jelly 



Jelly masses, only up to 7 mm. high, small and 



rounded; teliospores, 17-23,14 thick G. gcrminule (2) 



Jelly masses wedge-shaped, up to 2o mm. higli; 



teliospores, 1o-18..j^ thick G. Nidus-avis (3) 



1. Gymnosporangium Juniperi-virginianae Schw. 



G. )tiacropi(s Link 



Plates 30 and 52 



This species is easily recognized on cedar by the large brown balls 

 with shallow pits which form long, tentacle-like, gelatinous processes 

 in wet weather in spring. After forming a crop of spores the balls 

 die and turn blackish. The mycelium is not perennial but grows on 

 the cedar through about twenty-one months from the infection of a 

 leaf in July and August to spore formation a year from the following 

 April. Infected apple leaves show thickened spots that are yellow or 

 orange and on these spots below are several clusters of pale tubes 

 which soon become lacerated and torn and more open. From these 

 drop the brownish aeciospores which again infect the cedars. The 

 elongated teliospores are 11-17 x 84-70/i, and sprout from near the 

 septum. 



The abundance of the cedar in this section makes the infection of 

 apples ver}' easy and, with the exception of San Jose scale, which is 

 much more easily controlled by sprajnng, this is the most serious apple 

 disease in Chapel Hill. There is hardly a cedar tree in town without 

 these rust balls on them and apple trees near them frequently lose 

 nearly all tlieir leaves in June and July and grow a new set by August. 

 Different kinds of apples show great variation in resistance to the 

 disease, the most inunune apparently being the Staymans Winesap. 

 Shockley and Bonum are very susceptible. 



2307</. On Junipcrus virginiuna. May 7, 191.1. 



2. Gymnosporangium germinale (Schw.) Kern 



('. clavipes Cooke and Pk. 



Plates 'M and r)2 



Attacking cedar twigs al>out 3-8 nun. in thickness, producing a 

 gradual fusiform enlargement about 5-12 nun. thick. The trelatinous 



