Well at least to me - inexperienced as I am - I find these things curious and interesting:
1) The blooms last at least a month; they start off pinkish and finish off purple. Here you can see the old and new clearly:
_DSC7086 by
dougbraz, on Flickr
2) At the end of the stems of each bloom, there appears a blob of resin - I'm guessing that it could be to keep ants off the flowers?
Photo1 by
dougbraz, on Flickr
Anyway, just some observations..
Have a good day - we are starting spring now down in the tropics - yay!
Doug