FIG. 66,Rosellinia necatrix. i, portion of root of apple-tree 

 with white fleecy mycelium ; 2, brown hyphae with swellings ; 

 3, root with sclerotia bearing conidial fruit ; 4, single cluster of 

 conidiophores ; 5, branch of last bearing conidia ; 6, stylospores 

 produced in pycnidia (after Viala) ; 7, perithecium surrounded by 

 conidiophores (after Viala) ; 8, ascospores; 9, a sycamore infected 

 with the fungus, the portion above ground enveloped in white my- 

 celium, the portion below ground with numerous sclerotia, c (after 

 Hartig). Figs, i and 9 reduced ; the remainder variously mag. 



