160 



BASEDIOMYCETES 



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

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

 pseudoparenchymatous covering. 



Fio. 163. Exolasidium vaccinii. I Hypertrophied stem of Vaccinium mils idcea ; II leaf 

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

 the parencbymatous 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). 



