A little help with plant identification

[chinjaysquare]

So... I happily purchased a plant without quite knowing what it is Anyone has any idea what this is?
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Thanks in advance!

[Shadow]

Myriophyllum matogrossense

[chinjaysquare]

Myriophyllum matogrossense

Thank you very much! By the way, have you tried growing it before? If yes, does yours open and close with accordance to the time of the day? For example, the leaves on mine will open only at 6 in the morning and close at 8 in the night. Is this normal? It is very amusing though...

[Shadow]

it suppose to open once your light is on. if not than the ambient light is to strong and make them wake up early. Is your tank near window? or maybe direct sunlight in the morning.

[chinjaysquare]

it suppose to open once your light is on. if not than the ambient light is to strong and make them wake up early. Is your tank near window? or maybe direct sunlight in the morning.

the tank is no where near the window. Well if the sky is the clear the only time sunlight can hit the tank is a brief 10 minutes past 9 am. No idea. I guess it opens at 6 because it takes sometime to open. However closing one hour before lights out? Hmmm...