What's the difference between barberry and berberry?

Barberry

Definition:

(n.) A shrub of the genus Berberis, common along roadsides and in neglected fields. B. vulgaris is the species best known; its oblong red berries are made into a preserve or sauce, and have been deemed efficacious in fluxes and fevers. The bark dyes a fine yellow, esp. the bark of the root.

Example Sentences:

(1) Serves 6 (makes 12 parcels) 2 tbsp rapeseed oil 1 large onion, finely diced 1 carrot, grated 1 tsp caster sugar 1 tbsp tomato paste 1 fresh bay leaf 1 tin chopped tomatoes 1 head Savoy cabbage, 12 leaves separated 500g beef mince 500g pork mince 160g rice, parboiled and drained 40g barberries (optional) To serve 100ml sour cream ½ small bunch dill, finely chopped 1 Make the sauce first.
(2) 3 Mix the minces, parboiled rice, barberries, seasoning and the remaining diced onion.
(3) Add some dried barberries to lift the flavour a little, but don't worry too much if you have trouble finding them.