The Helebore sp. ( Helleborus niger and H. hybridus) are evergreen and perennial plants. Quite decorative, if you ask me.
I keep wondering how’d it look if in a bright colored kusamono pot, specially the H. hybridus one. In the garden of my mother they are up to 50 cm high with leaves, as big as my head (and I have a big melon on my neck).
H.niger
H. hybridus
H. niger
Bonus: some inspirational helleborus kusamono:
Tree in my Palm 