Pennywort Question

Thanks! I bought some today and want to be able to cut some for my other tank as well.
 
If I add a weight to one of the stems will it root in the substrate where it is weighted? The plant is already tall. Here is a picture of it in the left hand corner. The tank was started today that's why all the bubbles.P1020009.JPG

P1020009.JPG
 
I don't have any weights on the base. The plant is being held in place by the substrate (Eco Complete and some pebble type gravel). I thought maybe weighing down a stem with some pebbles for it to take root?
 
Thanks! I was really excited to find it at the LFS today. He just got it in his stock a couple of days ago.
 
probably my favorite plant in my aquarium, I let most of it just float so my greenfire tetra's can sleep in its roots. I have found though, that if it doesn't get enough co2 or light, its an algea magnet.
 
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