| Axil - The upper angle where a leaf stalks joins the
stem or a smaller stem joins a larger one. |
| Alternate - One leaf attached at each node. See opposite
and whorled. |
| Capsule - A dry fruit which contains more than one
seed and splits open when ripe. |
| Catkin - A compound bloom consisting of scaly bracts
and flowers usually of one sex. |
| Deciduous - Refers to trees which drop their leaves
in autumn. Compare to evergreen. |
| Downy - With very short and weak soft hairs. |
| Drupe - A type of fruit having a single seed enclosed
in a hard layer and that is covered with soft, often juicy flesh, as in cherries
and peaches. |
| Evergreen - A plant that retains green leaves throughout
the year. Life span of an individual leaf can be 2-15 years. |
| Leaflet - A leaf-like portions of the blade of a compound
leaf. There is no bud in the axil of its petiole. |
| Leaf Scar - The impression in a twig at the point
where a leaf was attached. |
| Lenticel - A pore in the bark of young trunks and
branches through which air passes to interior cells. |
| Lobe - A division or projecting part of the blade
of a leaf. |
| Opposite - Two leaves attached at each node. See alternate
and whorled. |
| Pedicel - The stalk of a flower or inflorescence. |
| Petiole - The stalk attaching a leaf blade to the
stem. |
| Pith - The spongy material in the center of twigs
and young trunks. |
| Sessile - Refers to a plant part having its base attached
directly to the stem without an intervening stalk. |
| Stalked - Refers to a leaf or flower having a length
of petiole or pedicel between its base and the stem. See sessile. |
| Witches'-broom - Abnormal brushy growth of small branches
caused by an infection. |
| Whorled - Three of more leaves or other parts attached
to a stem at the same point. |
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