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The Museum Gazette 



The spores, when blown from the cups, are parried in the air 

 to currant bushes, and, settling upon the leaves, they ger- 

 minate, and the resulting mycelium ramifies in the tissues of 

 the leaves. At first the presence of the parasite is not easily 

 detected, but later on it is indicated by yellow spots, which 



A Currant Leaf infested by the Cronartium, and Portions of 

 Weymouth-Pine showing the Peridermium strobi. 

 (From Massee's "Text-Book of Fungi," with the Author's permission.) 

 For explanation of details of text. 



appear on the upper surface of the leaf in autumn. Imme- 

 diately below such a spot the fungus will be found (fig. i). 

 It consists of a mass of very slender hair-like bodies (fig. 2) 

 about one line long, and' of a light brown colour, sometimes 

 almost covering the whole surface. Each " hair" consists of 

 uredospores and teleutospores which have grown together. 



