| Abbreviation | Definition |
|---|---|
| FFF | Flaming Foliage Festival |
| FIA | Forest Inventory and Analysis |
| FIDS | Forest Interior Dwelling Species |
| FIOB | Frente Indigena Oaxaqueno Binacional |
| FIR | Fire and Insect Resiliency |
| fl. | flower (bot.) |
| FLC | Four Leafed Clover |
| FLNV | Freesia Leaf Necrosis Virus |
| FLP | Flower Label Program |
| FMP | Flow Moisture Point |
| FNA | Flora of North America |
| FNPT | Federation Nationale Des Planteurs De Tabac |
| FOS | Forensic and Osteoarchaeological Services |
| FP | Flower Points |
| FQA | Floristic Quality Assessment |
| FR | Forest Root |
| FSAR | Forest Service Acquisition Regulation |
| FT | Frozen Thorn |
| FTBG | Fairchild Tropical Botanic Gardens |
| FTG | Flower Transport Gel |