Rhubarb is a P
erennial plant, not a fruit, not a vegetable. So nope, that's not right.
Rhubarb is considered a vegetable because it's close to a Sorrel, and considered a fruit because it's eaten as a desert. It's in fact, a plant.
Carsick is right that the american's classified Rhubarb for tax purposes on how it's eaten though
(You eat the stem of the plant)