Letter - A
- Aerial Roots - Roots that grow above the soil surface from nodes on the stem. These roots are mainly used to help trailing and climbing plants vines get hold of vertical surfaces but sometimes draw moisture from the air or flowing down the stem.
- Annual - A which completes its life cycle in one growing season. These plants are usually discarded when the cycle is finished as the plant dies.
- Axil - The elbow between the leaf stalk and stem from which new leaf and buds begin to grow.
- Axis - Main line of growth from root up.
Letter - B
- Biennial - A plant which requires 2 growing seasons to complete its life cycle. Biennial plant usually produce leaf structure during the first season and flower in the second. After a biennial plant has flowered it will be difficult to get it to do it again.
- Bilateral - Having two sides.
- Blade - The expanded part of a leaf.
- Botany - The scientific study of plants.
- Bud - A shoot, leaf or flower in embryo form. Growth buds are protected by over-lapping scales or sheaths and can form in the axil is known as an axillary bud and a terminal bud is one that forms on the end of new growth.
- Bulb - An underground stem, usually consists of a fleshy pod from which a plant will grow when conditions are right.
Letter - C
- Capillary Action - Describes the movement of water up through the roots, stem and leaves of a plant.
- Chlorophyll - A magnesium based molecule in plants, usually green, responsible for converting light energy to create sugar and oxygen from carbon dioxide and water.
- Chloroplast - Tiny green formations in plants that contain chlorophyll.
- Cladode - Stem structure with the characteristics of a leaf.
- Compound Leaf - A leaf with many different parts, it appears as individual leaves on a main branch but actually act together.
- Crown - The point of a plant at which the stem meets the roots.