Fig. 5. Rhizopus necans. i, section of a diseased lily bulb, the dark portion at 

 the base of the bulb is the part attacked by the fungus ; 2, portion showing the 

 fungus in the fruiting condition, growing on the roots of a bulb, natural size ; 3, 

 cluster of the fruit-bearing branches of the fungus, X 5 ; 4, a cluster of the sporangeal 

 form of fruit, X 50; 5, diagrammatic section of a sporangium; , columella; the 

 portion b, between the columella and the outer wall of the sporangium, is filled with 

 co/iidia; 6, spores, some of which are germinating, X 200; 7, spores, showing the 

 delicate markings on the epispore, X 700 ; 8, mature zygospore, X2ooJ 9, mycelium 

 of the fungus running between cells filled with starch, Xsoo (from Kew Btilletiii). 



