| Name | Structure/ Category | Description |
|---|---|---|
| Deciduous | (2) [Seed cone armature] {persistence} | Armature tending to fall off while the cone is otherwise still intact. |
| Decurrent | [Leaf bases, Leaflet bases]{shape} | With the leaf base extending downward along the stem |
| Decussate | [Leaves] {insertion} | Arranged along the stem in pairs, with each pair at right angles to the pair above or below; a form of opposite arrangement. |
| Deeply lobed | [Leaflets, Leaves, Petals, Sepals] {lobing} | With lobes that are cut approximately = to > the distance to the midrib or base; deeply cleft. |
| Dehiscent | Splitting or forming one or more openings in a regular pattern at maturity enabling the contents to be released for dispersal, as certain fruits, such as capsules, that split open when ripe releasing seeds. | |
| Deltoid | [Leaflets, Leaves, Petals, Phyllaries, Sepals] {shape} | Similar in shape to an equilateral triangle, with the point of attachment along one of the sides; like the Greek letter delta. |
| Dentate | [Leaf margins, Leaflet margins, Petal margins, Phyllary margins, Sepal margins] {form} | Toothed along the margin, with pointed teeth that are directed outward rather than forward. |
| Denticidal capsule | [Fruits] {type} | A capsule that opens (dehisces) at the apex, leaving a ring of teeth. |
| Denticulate | [Leaf margins, Leaflet margins] {form} | Toothed along the margin, with very small, pointed teeth that are directed outward rather than forward; finely dentate. |
| Determinate inflorescence | An inflorescence in which the terminal or central flower opens first, halting further elongation of the main axis, as in cymes. |
