String of Hearts Vine, along with Rosary Vine, is a common name for Ceropegia woodii. Ceropegia woodii is a popular hanging houseplant because it is easy to care for, beautiful and being a succulent it is very forgiving to being under-watered. When being grown indoors as a houseplant it is recommended to grow it in a very bright area where it receives direct sun. I grow my plant in a west facing window and don't supplement the low light levels with grow lights and it does pretty good for me. If you're interested I've written a previous post titled Ceropegia woodii: String of Hearts where you can see a photo of the flower. While better known for the foliage and tubers this plant does produce a small flower that is as interesting, if not more, than the tubers and leaves.