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

A perennial plant lives and blooms for many years.

spine -- a stiff, sharp structure formed by the modification of a plant organ that contains vascular tissue. A spine can be formed by a latteral branch, a modified leaf or a thorn.

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

ribbed -- having prominent, narrow parallel protrusions that extend over most of its length or circumference.

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

blade -- Just the flat part of a leaf. Not the stem.

pappus -- Small scales, bristles or hairs at the top of the seed in Asteraceae. For example, dandelion parachutes. Plural: pappi.

lobe -- A rounded parts of a leaf (or other organ).

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.

pinnate -- A compound leaf with two rows of leaflets.

beak -- A pointy thing on a seed or fruit.

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

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

lobe -- Being divided by clefts.