I'll have to check my computer through my photos. There was a really interesting vining Ceropegia at the Conservatory of Flowers in San Francisco last time I went. Had some interesting green blooms. Not sure what species it was. I'll see if I can find it.
Edit: Oh darn, I think it's on my Nikon. Which is back home and I'm in an airport right now. Guess that'll have to wait!