20 Seeds - Monkshood Seeds - Aconitum Napellus - wolf's bane, leopard's bane, women's bane! 20 Seeds - Monkshood Seeds - Aconitum Napellus - wolf's bane, leopard's bane, women's bane! Aconitum napellus is a species of flowering plant in the genus Aconitum of the family Ranunculaceae, native and endemic to western and central Europe. It is an herbaceous perennial plant growing to 1 metre tall, with hairless stems and leaves. Monkshood is a beautiful perennial flower with deeply cut foliage and loose spikes of dark violet-blue flowers. It establishes from Monkshood seeds and prefers damp areas with rich humus soil and persistent moistness. The Monkshood plant reaches a height of 36 - 48 inches, and it generally is sturdy enough to not need staking.