1?°19y}0m 
-oesoLiquta 
S][20 
~19}4S0up 
solodseSour 
D 
| 
Bp 
| 
9 
CD 
| 
c> 4p 
y 
Cys 
: 
oo oo 
Co 
oo oSo 
et 
embryosacdevelopment 
a, gen 
embryosac-formation 
Fig. 1b. Ernst’s conception of homologies in Angiosperm embryosacs. 
row of four megaspores 
row of three megaspores 
row of two megaspores 
th i 
e 
funct, as megaspore. 
