:272 



Etltel McLennan 









/^^ V rv/i V 



1 



,.y 



Text- Figure 6. 



The external appearance of the ovarj- of Lolium perenne at Stage 

 J3. X 15 diam. 



starchy contents are disorganised and absorbed into the hvphal 

 system. The collapse of these cells enables the ovule to encroach 

 on the space formerly occupied by them, and elongation of the 

 developing grain thereby results. At this period the ovule does 

 not increase markedly in breadth, and so the cells composing the 

 side walls of the carpel are not yet invaded, the activity of the 

 fungus is, as in Stage A, more evident in the distal region. 



The most noticeable change occurs in the ovule itself. The 

 fungus is responsible for the disorganisation of the nucellus. 



