Look like Gower Ramsey. The problem is, without proper identification its very difficult to tell whether its O Gower Ramsey or O Sweet Sugar. The two are almost identical. Someone said that Sweet Sugar have bigger flowers than Gower Ramsey. My Gower Ramsey (at least thats what the vendor told me) sometimes have big flowers, sometimes smaller depending on the health of the plant.
Whether its Gower Ramsey or Sweet Sugar, thats a lovely flower, NTG. I love them because they never failed to bloom for me and they don't require much of my time.