I have three of those, it is almost like a dwarf amazon sword, may be broad leaf as the leaves are a bit different. They stay small and the leaves are thick, they are great for infront of the tank for an accent. I believe that they grow a bit bigger, like in the photo, in low light, but in medium-high light they should stay fairly compact.
So yeah, not sure on the name, but I have 3 of them.
15 Gallon NPT
1g no tech bowl in the making