| A | B |
|---|
| Accent | an item used to create interest in a landscape |
| Aeration | movement of air into and through the soil |
| Allelopathy | the toxic effect of one plant on another |
| Annual | a plant which grows, flowers, produces seed, and dies in one year |
| Arboriculture | cultivation of trees and shrubs |
| Biennial | a plant which produces vegetation in one year, flowers the next, and then dies |
| Callus | mass of cells which forms around the wounded area of a plant to start the healing process |
| Capillary Action | movement of water upward through narrow spaces in the soil |
| Chlorophyll | the green substance which gives many plants their green color and is necessary for photosynthesis |
| Common name | the English name of a plant which may differ in various localities |
| Cotyledons | the first leaves to appear on a plant; seed leaves |
| Cultivars | another name for a specitic plant; same as variety |
| Deciduous | a plant which loses its leaves during certain seasons |
| Dicot | a plant having two cotyledons, or seed leaves |
| Direct seeding | planting seeds in a permanent growing site |
| Division | a method of propagation requiring the cutting and dividing of plants |
| Dormant | in a resting, or nongrowing state |
| Drip line | the imaginary circle which indicates the outer edge or farthest extension of a tree's branches |
| Embryonic plant | the entire plant before germination; embryo |
| Endosperm | the food supply for the young developing seedling which is contained in the seed |
| Epidermis | the skin of the leaf |
| Evergreen plant | a plant which has leaves or needles throughout the year |
| Flat | a tray used to start seedlings |
| Focal Point | an accent point in a landscape |
| Germinate | to sprout or begin to grow |
| Hardening off | gradually subjecting plants to more difficult growing conditions |
| Hardiness | ability of a plant to withstand the minimum temperature of an area |
| Horticulture | a field which includes growing of fruits, nuts, vegetables, ornamental plants, and flowers |
| Hybrid | an offspring of two different varieties of one plant which possess certain characteristics of each parent |
| Leaf blade | the flat part of the leaf |
| Lenticels | breathing pores in the bark of woody stems |
| Medium | a material which is used to start and grow seeds and plants |
| Monocot | a plant having only one cotyledon, or seed leaf |
| Mulch | any material used to cover the soil for weed control and moisture retention |
| Perennial | a plant that grows year after year without replanting; plant whose roots live from year to year. |
| Perlite | a white granular material used to help loosen or open up spaces in rooting media |
| Petiole | stalk or stem which supports the blade of the leaf |
| Photosynthesis | manufacture of food by green plants |
| Pot-bound | roots growing in a tight pattern around the walls of the container |
| Propagate | to increase in number, to reproduce |
| Rhizome | underground stem |
| Root hair | a very tiny rootlike extension on small feeding roots |
| Rooting hormone | a chemical, in powder or liquid form, that helps cuttings to root faster and have a greater number of roots |
| Scientific name | the Latin name of a plant giving its genus and species |
| Seed coat | the outer covering of a seed |
| Self-pollination | fertilization of a plant by its own pollen |
| Shoot | current season's growth of a plant; rapid, new stem growth |
| Skew | a tool used to level media in flats before planting |
| Soilless | no soil in the growing mix |
| Sphagnum peat moss | a material formed from decayed bog plants; used in growing media |
| Stamen | the male part of the flower |
| Stigma | the female part of the flower |
| Taxonomy | the study of plant names and the identification of plants |
| Tendils | structures on a plant vine or stem which allow the plant to attach itself to a trellis of other structures |
| Texture | the coarseness or fineness of plant leaves |
| True to seed | reproducing offspring from seed which are nearly exact duplicates of the parent plant |
| Trunk | the main stem of a plant which lives on for years |
| Vermiculite | a light mineral (mica) used to increase the moisture-holding capacity of media |
| Xeriscaping | a landscaping technique used to practice water conservation |
