SPHAEROPSIDIACEAE 



39 



etc. The conidia are very minute and colourless, and often 

 emerge from the mouth of the perithecium under the form 



FlG. 125. Vermicularia circinans. i, an onion 

 attacked by the fungus : the minute black fruiting bodies 

 are arranged in concentric circles ; 2, one of the fruiting 

 bodies of the fungus, showing the sterile black spines 

 springing from the sporodochium or conidia-bearing 

 body ; 3, section through a sporodochium, showing the 

 short, simple conidiophores bearing the narrow, curved 

 conidia : two black sterile spines are also present. Fig. i , 

 nat. size ; the remainder mag. 



of threads or tendrils, consisting of myriads of conidia held 

 together by mucus. 



