WILLOW LKAF-P.IJSTER. 



4S5 



8. Mclampsora Jfartif/ii, Thiim. 



(Willow Leaf-blister.) 

 a. Description and made of Allaclc. 



On the leaves of sever 

 their under surface and 

 golden - coloured 

 cushions, subse- 

 quently turning 

 brown and then 

 black, may appear 

 at the end of May 

 or the beginning of 

 June. Leaves which 

 have been attacked 

 soon become marked 

 with black blotches 

 and fall off; the 

 badly infected shoots 

 also die from their 

 tips downwards. 

 The sporofarps hi- 

 bernate on the dead 

 leaves lying on the 

 ground and produce 

 promycelia and 

 sporidia in the 

 spring, the spores 

 from which spread l 

 the malady by ger- 

 minating on fresh 

 leaves and shoots. 



The same disease 

 infects species of Rihen 

 Caeoma IlH>t'sii, Link., 

 unnecessurv in the life 



al species of willow, and especially on 

 the ends of their young shoots, little 



i-. 237.— *//,■.(■ acutifoUa, Willd., attacked by 



MeJampsnra llailujii. 

 II Green leaf witli orange yellow sporoearps. 

 h Leaves with black patches, withering. 

 e Sporoearps on the epidermis of the stem. 



(currant or gooseberry plants), as 

 but this intermediate stage is 

 of the fungus. 



