Heuchera 'Binoche' (PBR) alum root 'Binoche' matt black palmately lobed leaves with panicles of small cream flowers.3 X 9CM POTS £14.99 (Copy) – Broadway Road Nurseries
Heuchera 'Chocolate Ruffles' a herbaceous perennial a spring summer foliage plant with purple leaves commonly known as alum root, stock photo image Stock Photo - Alamy