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Alternate |
One (leaf or bud) at a node; placed singly at different heights on the stem. |
Blade |
The expanded part of a leaf; the leaf excluding the petiole. |
Chambered pith |
Pith in transverse plates with air cavities between them. |
| Compound leaves | Those in which the blade consists of two or more separate parts (leaflets). |
| Deciduous | Falling off in autumn or before. |
| Entire | Having a continuous unbroken margin, not toothed, notched, or divided. |
| Lanceolate | Several times longer than wide, broadest near the base and narrowed to the apex. |
| Leaflet | One part of a compound leaf. |
| Leaf scar | A scar left on the twig when a leaf falls. |
| Linear | Long and narrow with parallel margins; line-shaped. |
| Lobed | Divided into segments about halfway to the middle; segments are larger than teeth. |
| Margin | The edge of a leaf. |
| Midrib | The main or central vein of a leaf or leaflet or leaf-like part, a continuation of the petiole. |
| Node | A joint or place where leaves are attached to a stem. |
| Oblique (leaves) | Having unequal sides or a base with sides of unequal lengths. |
| Opposite | Two (leaves or buds) at a node, on opposite sides of an axis. |
| Ovate | Of the shape of a longitudinal section through a chicken egg, with the broad end toward the base. |
| Palmate | Radiating fan-like from approximately one point. |
| Persistent | Remaining attached; leaves not all falling off at the same time. |
| Pinnate | Arranged feather-like on each side of a common axis. |
| Serrate | Having sharp teeth pointing forward, saw-toothed. |
| Simple leaves | Those in which the blade is all in one piece; may be lobed or cleft but not divided all the way to the midrib. |
| Spur | A short, slowly grown branchlet. |
| Terminal bud | The bud formed at the tip of a twig. |
| Thorn | A modified stem or branch with a sharp point. |
| Truncate | Ending abruptly as if cut off transversely. |
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