Which Angiosperm is Vesselless?
Trochodendron is a genus of flowering plants with one living species, Trochodendron aralioides, and six extinct species known from the fossil record. It was often considered the sole genus in the family Trochodendraceae. Trochodendron has secondary xylem without vessel elements in their wood, a quite unusual feature in angiosperms.
The generic name Trochodendron, derived from the Greek trochus, a wheel and dendron, a tree, literally means wheel-tree from the manner in which the stamens radiate like the spokes of a wheel, as well as the spreading leaves on the branches.