Berberis x hybrido-gagnepainii 'Park Jewel'

Berberis gagnepainii x Berberis verruculosa, also known as Berberis x chenaultii, the hybrids are generally more luxuriant than Berberis verruculosa with lustrous dark green leaves that turn a brilliant red in autumn, its cold hardiness rivals Berberis julianae, one of the few zone 5 evergreen Berberis.