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Here is a picture of Echinodorus bleheri (Amazon Sword). This is the one that has the stem that has the baby plants on it. there are many different types of swords out there and all of them reproduce differently, there are even hybrids that dont reproduce at all. The Echinodorus bleheri is also able to flower if the stem reachers the top of the tank im pretty sure that the Echinodorus bleheri is the only one that has the ability to do this. Hope this helps send me a pm and i can further help you clarify what type of sword you have.