Alluaudia proceraAlluaudia procera at a glance: Alluaudia procera looks almost prehistoric in a pot, building stiff green columns lined with stout spines and flicking out small paired leaves when warmth and strong light are on point. In nature it can become a tall tree like presence in Madagascars spiny forests, but indoors it grows much more slowly, usually as a vertical, architectural succulent that can still reach 13 m over many years if given enough light and