CALYPTOSPORA. 



371 



intercellular spaces become enlarged, and the contents of all 

 cortical cells, except those of the epidermis, takes on a red 

 colour, whereby the young shoots have at first a delicate rose- 

 red colour, though they afterwards turn brown. The lower 

 leaves have a similar red colour, but shrivel and fall off early, 

 while the upper ones develop normally and remain attached. 



Fig. 202. — CaXyptospora Goeppertiana. Normal and malformed shoots of 

 Vaccinium Vitis-Idaea, (v. Tubeuf phot.) 



Shoots infected one summer show the symptoms in the 

 following year. The swelling is confined to the basal part of 

 a year's growth, and the apices of shoots remain normal to all 

 external appearance, although permeated with mycelium. Hartig 

 has explained this by assuming that the fungus-mycelium only 



