The Common Barberry [Herberts vulgaris). 



A. — Flowering Shoot in May or June, showing the Cluster Cup stage of the Bust 



Fungus forming yellow or orange coloured spots on the leaves. The spines 

 on the stems, usually in threes, distinguish this from most common, garden 

 Barberries. 



B. — A Shoot in Autumn, with long red Berries which hang in clusters. 



C. — Leaves, enlarged, showing tooth margins and the yellow spots with the Cluster 



Cup sta^e of the Fungus. The spores from these cups infect the Wheat. 



D. — A small piece of Wheat attacked by Black Bust showing as black lines on t lu- 



st em. 



