All of it. the part you eat is the stalks
Rhubarb is the whole plant. You eat the stalks of the plant.
The Stem
Rhubarb.
It the pink or red bit as you want to call it.
The stalks are edible, the leaves poisonous
The leaves of the rhubarb plant are poisonous and should not be consumed, as they contain high levels of oxalic acid which can be harmful to humans.
The rhubarb plant has edible stalks, which are commonly used in cooking, but its leaves are toxic if ingested due to high levels of oxalic acid. It's important to only consume the stalks of rhubarb and avoid the leaves.
rhubarb is a plant that you can eat when it is cooked
I don't think so because rhubarb is a type of plant and that's a noun.
Rhubarb
Rhubarb is a member of the same family as buckwheat, the Polygonaceae family.
Arugula beets kale lettuce Parsnips radishes garlic peas parsley rhubarb