Mystery plant

[Malupoo]

Hey guys, I found a mystery stem in some plants I bought ages ago. Stem was tiny but u thought I would just throw it in my substrate.

Fast forward a few weeks and it has grown and went a bit brown but now a second has sprouted next to it.
I provided a pic but my light makes it rather yellow and hard to make out.

Thanks for any identification help.

 

[Malupoo]

Lights just went out and managed to get a Better shot

Looks like it has new growth coming through to its right as well

 

[Niccobacci11]

looks like some sort of hemianthus, not sure though because the stem is so small.

 

[Malupoo]

http://www.tropica.com/en/plants/plantdescription.aspx?pid=048

This is the closest I can find in photo but maybe I'm missing something... Main reason I don't think it's the one in the link is it's growing rather rapidly and without co2