| Name | Structure/ Category | Description |
|---|---|---|
| Filament | The stalk of a stamen, which supports an anther at its tip. | |
| Filiform | [Leaflets, Leaves] {shape} | Long and very slender, basically round in cross section and of uniform diameter; thread-like. |
| Flagellum | (pl. flagella) a long tapering process that projects singly or in groups from a cell or microorganism, is possibly equivalent to a much enlarged cilium, and is the primary organ of motion of flagellated protozoans and many algae, bacteria, and zoospores <.b>4 a long slender shoot (as a stolon or runner) of a plant | |
| Flaky | [Bark of mature trunks] {surface appearance} | Bark with more or less regular, thin flakes, as in eastern hophornbeam (Ostrya vriginiana) and many pines (Pinus). |
| Fleshy | [Seed cone scales] {type} | Fairly firm and dense, juicy or at least moist, and easily cut. |
| Floral | upon, within, or associated with the flowers. | |
| Floral Bracts | A compound flower often has floral bracts that circumscribe its base, particularly among members of the Asteraceae (Aster family). These scale-like bracts surround the ovaries of the flower and they are often appressed together. They are often referred to as 'involucral bracts' or 'phyllaries' by botanical authorities. | |
| Floral cup | A cup or tube usually formed by the fusion of the basal parts of the sepals, petals and/or stamens, and on which they are seemingly borne; surrounds the ovary, or ovaries, and may be fused wholly, partly or not at all to them; the shape varies from disc-like to cupshaped,flask-like or tubular; a hypanthium. | |
| Floret | A very small, structurally specialized flower, especially those of the grasses (Poaceae) and the sunflower family (Asteraceae). | |
| Flower | The reproductive structure in flowering plants (angiosperms), consisting of stamens and/or pistils, and usually including a perianth of sepals and/or petals. |
