This plant is Aconitum, or monkshood.

这种植物叫做乌头属，又名附子属。

Called monkshood. The queen of poisons.

起效极快。

“What is the difference, Potter, between monkshood and wolfsbane? ”

“波，那你说说舟形乌头和狼毒乌头有什么区别？”

The most deadly plant at Alnwick will be things like monkshood or wolf's bane, both types of Aconitum.

克最致命的植物是附子草或狼毒，这两种植物都是乌头。