Southeastern Arizona plant common names that begin with F.
- Fairy Duster
- Fairyduster
- False Garlic
- False Garlic, Texas
- False Goldeneye, Longleaf
- False Indian-mallow
- False Monkey-flower
- False Monkeyflower
- False Prairie-clover, Parry's
- False Springparsley, Alpine
- Fameflower, Orange
- Fanfare Blanket Flower
- Fanfare Blanketflower
- Fanpetals, Spreading
- Feather Dalea
- Feather-plume
- Featherplume
- Feathery Dalea
- Fendler Ceanothus
- Fendler's Buckbrush
- Fendler's Ceanothus
- Fendler's Dandelion
- Fendler's Desert Dandelion
- Fendler's Desertdandelion
- Fendler's Horsenettle
- Fendler's Potato
- Fendler's Globemallow
- Fendlerbush, Wright
- Fendlerbush, Wright's
- Fern, Standley's Cloak
- Fern, Star Cloak
- Fetid Passionflower
- Few-flower Aster
- Few-flowered Aster
- Few-flowered Scurf-pea
- Fewflower Wirelettuce
- Fiddleneck, Common
- Field Bindweed
- Field Melilot
- Fiesta-flower, Blue
- Fiestaflower, Blue
- Fiestaflower, Desert
- Figwort, Pineland
- Filaree
- Filaree, Redstem
- Finger-leaved Gourd
- Fingerleaf Gourd
- Firecracker Bush
- Firecracker Penstemon
- Firecracker, Eaton's
- Firecrackerbush
- Fireweed, Rancher's
- Firewheel
- Fishhook Barrel Cactus
- Fishhook, Arizona
- Five Eyes, Greenleaf
- Five-finger
- Five-needle Pricklyleaf
- Fiveneedle Pricklyleaf
- Flameflower, Orange
- Flannel Mullein
- Flannel Plant
- Flatspine Stickseed
- Flax, Lewis
- Flax, Meadow
- Flax, Prairie
- Flax, Western Blue
- Flaxflowered Ipomopsis
- Fleabane, Canada
- Fleabane, Horseweed
- Fleabane, Spreading
- Floating Marsh-pennywort
- Floating Marshpennywort
- Floating Pennyroyal
- Floating Pennywort
- Florida Hopbush
- Foldwing, Arizona
- Foothill Bird's-foot Trefoil
- Foothill Deervetch
- Foothill Palo Verde
- Foothill Paloverde
- Forget-me-not, Winged-nut
- Fort Huachuca Verbena
- Fort Huachuca Vervain
- Fountain Grass
- Fountaingrass, Crimson
- Four O'Clock, Longtube
- Four O'Clock, Narrowleaf
- Four O'Clock, Ribbon
- Four O'Clock, Sweet
- Four O'Clock, Trailing
- Four-wing Saltbush
- Fournwort, Hairy
- Fourwing Saltbush
- Fragrant Evening Primrose
- Fremont Cottonwood
- Fremont's Cottonwood
- Fringed Amaranth
- Fringed Redmaids
- Fringed Twinevine
- Fringepod, Sand