Poison hemlock and Poisonous plant

Poison hemlock noun - Large branching biennial herb native to Eurasia and Africa and adventive in North America having large fernlike leaves and white flowers; usually found in damp habitats; all parts extremely poisonous.

Poisonous plant and poison hemlock are semantically related. In some cases you can use "Poisonous plant" instead a noun phrase "Poison hemlock".

Poisonous plant noun - A plant that when touched or ingested in sufficient quantity can be harmful or fatal to an organism.

Poison hemlock and poisonous plant are semantically related. Sometimes you can replace phrase "Poison hemlock" with "Poisonous plant", this phrases are similar.