An entire leaf has smooth edges. Not toothed or lobed.

A perennial plant lives and blooms for many years.

achene -- a type of simple dry fruit produced by many species of flowering plants. For example, a rose hip holds a few achenes.

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

ray flowers -- The outer petals of a sunflower or daisy are ray flowers.

Bracts are modified leaves associated with a flower.

Involucre is the name given to the circle or spiral collection of bracts around a flower-cluster.

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

basal leaves -- a leaf that grows lowest on the stem of a plant.

genus -- A subdivision of a botanical Family in which all members have a significant number of similar characteristics.

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