| Name | Structure/ Category | Description |
|---|---|---|
| Not persistent | [Seed cones] {persistence} | Falling from the branch soon after shedding seeds. |
| Not serotinous | [Seed cones] {serotiny} | Having cones that open when the seeds ripen or soon thereafter. |
| Nucleus | an element of the protoplasm of most plant and animal cells that is regarded as an essential agent in their metabolism, growth, and reproduction and in the transmission of hereditary characters and that typically consists of a more or less rounded ma ss of nucleoplasm made up of a hyaline ground substance in which is suspended a network rich in nucleoproteins from which the mitotic chromosomes and one or more nucleoli condense, the whole being enclosed by a nuclear membrane | |
| Nut | [Fruits] {type} | A more or less large, dry fruit that does not split open at maturity (indehiscent), with a single inner chamber and a thick, bony wall surrounding a single seed, as walnuts (Juglans). |
| Nutlet | a small nut-like fruit (as of many plants of the family Boraginaceae) | |
| Nutrition | Mode of acquiring substances necessary for growth and development. | |
| Obcordate | [Leaflets, Leaves, Petals, Phyllaries, Sepals] {shape} | Heart-shaped with the point of attachment at the narrow end; inversely cordate. |
| Obdeltoid | [Leaflets, Leaves, Petals, Phyllaries, Sepals] {shape} | Similar in shape to an equilateral triangle, with the point of attachment at the narrow end; inversely deltoid. |
| Oblanceolate | [Leaflets, Leaves, Petals, Phyllaries, Sepals] {shape} | Several times longer than broad, widest near the apex and tapering to a point at the place of attachment; inversely lanceolate. |
| Oblique | [Leaf bases, Leaflet bases] {shape} | Having an asymmetrical base. |
