I just got this cutting. I know I have seen before, but I can not remember what species it is.
As you can see from pictures there are no flower nor buds that may help to identify it. Since I don't know if roots are well established, I do not like to take picture of them. By the way I think that leaves show a nutritional deficit (maybe due to a small root system) and therefore its natural color could be different.
The cutting was a gift. The original owner has not watered it and apparently died (as you can see in first picture there is a dry stem). Later it sprouted again. Neither the original owner nor who gifted it... know what it is.