Fig. 66. Roselliuia 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 

 conic! iophores ; 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 brlow ground with nutritious sclerotia, c (after 

 Hartig). Figs. 1 and 9 reduced ; the remainder variously mag. 



