Aponogeton Madagascareiensis var Fenestralis?

Could anyone 'identify' this plant please?

1. Mature leaves 150mm wide and 300mm long
2. Tip is blunt {almost straight across}                                   
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 3.Flower is twin-spike,white with pale yellow tip

Any 'suggestions' as to bringing up the seedlings? {assuming they are self-fertile!}
So far all I have established is that it prefers temp<25oC.It has divided at the 
rhizome but I have not split the daughter {person?} plant {just gutless!}.

Eng Chuah  ANGFA (Qld)  Australia