FIG. 59. Rhizopus necans, a fungus whose sexual product is a zygospore. 

 i, section of a lily bulb attacked by the fungus, the dark portion is infected 

 by the parasite ; 2, the fungus-bearing conidial fr"uit, and showing the habit 

 of growth ; 3, conidial fruit on a larger scale ; 4, a single cluster of conidial 

 fruit or sporangia, showing the rhizoids or vegetative hyphae at the base ; 



[Description continued on p. 252. 



