if its dry you can cut it... if you have babies you'll see them as tiny green balls attached to your stem, max size ~5mm, they will fall in water and grow pretty quickly )
not my picture, but you'll understand the idea )
you can check here - they have more pictures of apono and seeds http://www.aquariumlife.com.au/showthread.php/6041-Aponogenton-crispus-flowering

not my picture, but you'll understand the idea )
you can check here - they have more pictures of apono and seeds http://www.aquariumlife.com.au/showthread.php/6041-Aponogenton-crispus-flowering