This grower is sure of this plant identification.
Selinum wallichianum. £3.50. 2nd year plants (sown 22.2.18) from seed (potted on 26.8.18). 9cm pots. healthy and vigorous. Message me if interested. Very limited number!
Selinum genus (Milk parsley). These are summer-flowering perennials. They are fully hardy and prefer sun but will grow in semi-shade and any well drained soil. You can propagate by seeds when fresh in the summer or autumn.
Once established, roots resent disturbance.
May be ideal for informal gardens and backs of borders.