Ludwigia glandulosa is native to the US and is is a medium class plant in terms of difficulty. It needs high lighting in order to survive - low lighting results in the leaves falling off. Best to give it CO2 and lots of macronutrients and it will really flourish.
The deep colouration of this plant makes it perfect for a centre piece. Plant multiples together around rocks and it really will catch your eye. Used to be known as Ludwigia perennis.