First, if it has a flower, then check what type of flower it is. In this case it had similarities to a daisy type flower which suggests Asteraceae.
I've just checked on the Plant List, the spelling should be Senecio stapeliiformis and that is a synonym of Kleinia stapeliiformis.
http://www.theplantlist.org/tp...
http://www.theplantlist.org/tp...
http://apps.rhs.org.uk/plantse...