Ceropegia aristolochioides

This is one of many flowers, that appeared this year on one of my two plants for the first time – similar flowers can be seen on several pictures in the internet, named as Ceropegia aristolochioides, or Ceropegia aristolochioides ssp. deflersiana.

As far as I can see (using my weak eyes) the carpel is glabrous, thus this particular plant should be of the nominate race.