| Name | Structure/ Category | Description |
|---|---|---|
| Fruit | The seed-bearing structure in flowering plants, consisting of one or more matured or ripened pistil(s), along with any persisting accessory parts such as sepals or receptacle. | |
| Funnelform | A corolla that is shaped like a funnel, being narrow and tubular at the base, but flaring outward toward the outer margin. The corollas of Ipomoea spp. (Morning Glories) and Calystegia spp. (Bindweeds) are funnelform. | |
| Furrowed | [Bark of mature trunks] {surface appearance} | Bark with relatively long narrow depressions or grooves, as in tulip-tree (Liriodendron tulipifera). |
| Fusiform | [Buds] {shape} | Elongate, broadest at the middle, evenly tapering to either end, and rounded in cross section; spindle-shaped. |
| Fusion | The physical connection of equivalent or dissimilar structures, as fused sepals or petals. | |
| Falcate | [Leaflets, Leaves, Petals, Phyllaries, Sepals] {shape} | Long, arcing to one side and |
| Fan-shaped | [Leaflets, Leaves] {shape} | Shaped like a fan, as a Gingko leaf. |
| Fascicle | [Inflorescences] {type} | A tight cluster of stalked (pedicellate) flowers, the stalks originating very close to one another and diverging little if at all. |
| Fascicled | [Leaves] {insertion} ; [Needles] {presence of clusters or fascicles} | In a tight bundle, several leaves appearing to arise from a common point and diverging little if at all, as the needles of many pines (Pinus). |
| Fibrous | [Roots] {type} | With several to many relatively slender roots of about the same diameter. |
