ID this red leaved plant

I am trying to figure out what this plant is. I was told it is Joseph's Coat (Amaranthus) but it isn't looking like it. The leaves are smaller and smoother and not lanceolate. I hope the pictures are enough to identify. They just began producing flowers. One of the pictures I attached you can see the small white flower. I took some cuttings and they have grown vigorously but since it's not Joseph's Coat I'm not sure if I want to keep it.

 

Looks as though inflorescence could be like that of Iresine.

 

Any idea of what cultivar of Iresine is? If it is Iresine, that is.

 

Here is a picture of more mature plants. These were grown from cuttings off the same mother plant as the ones in the above post.

 

*Bump*

Still trying to figure out what cultivar of Iresine this is, or if it is Iresine at all.

 

Re: Is this Iresine? If so, what kind?

I've found that it could be a variety of Alternanthera dentata. It has smaller leaves than the 2"-3" I've found in descriptions of A. dentata.
The flowers are almost identical as well as the growth pattern and appearance. May just be a dwarf variety.

Does anyone know?

Thanks for any help.