Monkshood

Tall plant, more than 1 m to the tip of the flower raceme.
It is an herbaceous perennial plant growing to 1 metre tall, with hairless stems and leaves. The leaves are rounded, 5–10 cm diameter, palmately divided into five to seven deeply lobed segments. The flowers are dark purple to bluish-purple, narrow oblong helmet-shaped, 1–2 cm tall.