160 



BASmiOMYCETES 



The hyphre generally have clamp-connections and unite, some- 

 times, to form a rhizomorpha (Fig. 177) or sclerotia with coloured, 

 pseudopai-enchymatous covering. 



FIG. 1G3. Exobasidium vaccinii. I Hypertrophied stem of Vaccinium vitis idcea ; II lea 

 with gall-like swelling ; III section of II ; IV transverse section : m mycelium between 

 tlie parenchymatous cells ; p hypodermal cells ; e epidermis with basidia in various stages 

 of development ; V epidermis with germinating spores; VI and VII spores germinating 

 in water (IV-VII x 620). 



