A perennial plant lives and blooms for many years.

A noxious weed is considered to be harmful to the environment or animals. Often a governing body designates plants as noxious.

A herb is a plant whose stems die back to the ground in the winter.

cross -- To make something interbreed. The act of hybridization.

Like the teeth on a saw, leaves and other surfaces can have toothed edges.

fruit -- any seed-bearing structure in flowering plants. It is formed from the ovary after flowering.

inflated -- Swollen. Looks unusually large.

alternate -- leaves alternate along the main stem and are attached singly.

lanceolate -- Lance-shaped. Long, wider in the middle.

rhizome -- root-like stems that may either grow horizontally at the soil surface or in other orientations underground.