From southwestern Madagscar, Kalanchoe daigremontiana is a single stemmed succulent to 3 feet tall. The leaves are roughly triangular and attractively mottled with purple on the undersides, if grown in bright enough light. Numerous plantlets grow along the edge of the leaves and these can be detached and potted to produce new plants. Once mature, usually about two years old, it produces a spectacular inflorescense of pendant, tubular, purple flowers. The plant dies after flowering.
     I've grown these off and on over the years and my interest waxes and wanes. They can be troublesome plants, they're very invasive. But I tried one in the garden a couple years ago and it did very well. Growing to about two foot tall and then finally flowering. I was blown away by the color of the flowers and stalk. I've rooted a bunch of the little pups and will plant another in it's place once it dies. For now it seems to be hanging on, producing a bunch of large plantlets on the lower stem.

Close up of the flower stalk

Seemingly refusing to die