stylistic:tone, linguistic:voice_change
Occurrence

Vascular cambia are found in all seed plants except for five angiosperm lineages which have independently lost it; Nymphaeales, Ceratophyllum, Nelumbo, Podostemaceae, and monocots. In dicot and gymnosperm trees, the vascular cambium is the obvious line separating the bark and wood; they also have a cork cambium. For successful grafting, the vascular cambia of the rootstock and scion must be aligned so they can grow together.