Allamanda blanchetti fertilization mechanism Here is an _Allamanda blanchetti_ flower in my garden. My question is based on the observation that the flower seems to be devoid of any reproductive structures, _i.e.,_ Stamen or Carpel, so how does it set seed? In the picture below it can be seen that the plant isn't sterile and successfully produces seed pods. ![ Large maroon flower]( flattened pod like fruit](

As far as the ID goes, this looks like _Allamanda blanchetti_. See this question.