Flower of Dillenia indica

That's the flower of Dillenia indica that i managed to capture in FRIM a few months ago. The fallen petals are white in colour. The stamens are claimed to be almost all the same length. However, from my disection i found outherwise. I notice that there are two types of stamen occuring in this flower. There is another one ring stamen that curve outwards situated around the carpel.