I'm wondering one, which Duranta is it, and two, where you are in the world - this plant is usually an annual in the UK

Indeed bamboo - there are so many in this cover. My books and google suggest that a tree type of this is an exotic small tree, ie not the usual verbena we get here??

Duranta repens, the one we grow here, stump sprouts very readily, but I don't know about the other species.