Looks like Senecio articulatus to me;).

Edit: Senicio articulaus doesn‘t have those leaves like yours does. So I think your plant is Senicio anteuphorbium aka Swizzle Sticks;).

The flower is very Senecio. The flowers on my guy below smell like clove or cinnamon. I wonder if yours has the same spicey smell.

Kara

I didn't realize they smell so nice until you mentioned :)

I wonder if Senecio mandraliscae (Blue chalk sticks) flowers smell the same - have to wait until buds open:

Flowers of OPs plant def. look like Senecio anteuphorbium (yellow anthers and stigmas)