| A | B |
| Stem | the primary structure that holds the foliage and/or flower |
| Terminal Leaflet | The leaflet located furthest from the bud |
| Evergreen | refers to trees that retain green leaves throughout the year, lifespan of an individual leaf 2 - 15 years depending on species and environmental conditions |
| Coniferous | any cone bearing tree species, usually with needles |
| Leaf blade | the broad flat part of the leaf |
| Petiole | Leaf stalk |
| Compound leaf | a leaf that is made up of 2 or more leaflets on the same petiole |
| leaflet | a leaf like part or blade of a compound leaf, there is no bud at the base of its petiole |
| Node | the point on a shoot where a leaf, flower, bud is attached |
| Simple leaf | a leaf that contains one blade |
| Deciduous | refers to trees that drop their leaves (broadleaf or needles) |
| Bud | a structure that will become a leaf, flower, or new shoot |
| Pith | the spongy material in the center of twigs and young trunks |
| Pedicel | the stalk of a flower or inforescence |
| opposite | 2 leaves attached to each node |
| lobe | a division or projecting part of the blade of a leaf |
| lenticel | A pore in the bark of young trunks and branches through which air passes to interior cells |
| Leaf scar | the impression in a twig at the point where a leaf was attached |
| Drupe | a type of fruit having a single seed, enclosed in a hard layer and that is covered with soft, often juicy, flesh (cherries and peaches) |
| Downy | With very short and weak soft hairs |
| Catkin | A compound bloom consisting to scaly bracts and flowers usually of one sex |
| Capsule | A dry fruit which contains more than one seed and splits open when ripe |
| Alternate | one leaf attached to each node |
| Axil | the upper angle where a leaf stalks joins the stem or a smaller stem joins a larger one |
| Stalked | refers to a leaf or flower having a length of petiole or pedicel between its base and the stem. |
| whorled | three or more leaves or other parts attached to a stem at the same point |
| witches broom | Abnormal brushy growth of small branches caused by an infection |
| sessile | refers to a plant part having its base attached diretly to the stem without an intervening stalk. |