GIBBERA. 



205 



twigs brown and dead (I'ig. 95). If more closely examined, 

 the twigs will be found to bear patches of coal-black, 



Fig. 96. — Gibbera vaccinii. Isolated ascns 

 with, eight spores ; isolated hair from the 

 outside of a perithecium. (v. Tubeuf del.) 



Fig. 95. — Gibbera vaccinii on 

 Cowberry. The perithecia form 

 black patches on the living leafy 

 branch, as well as the dead brown 

 one. (v. Tubeuf del.) 



^-^ 



Fig. 97. — Gibbera vaccinii. Cross-section of Cowberry showing^ 

 a patch of perithecia in section ; the hairy perithecia contain 

 paraphyses and asci with spores ; a mycelium permeates the 

 cortical tissue of the host. Short hooked haira cover the 

 epidernus of the stem. (v. Tubeuf deL) 



spherical perithecia, which are coated by short, acute, unicellular, 

 black hairs (Fig. 97). The perithecia contain paraphyses and 



