| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| FRJO | Frankenia johnstonii Correll | Johnston's seaheath | Frankeniaceae
|
| FRPA | Frankenia palmeri S. Wats. | Palmer's seaheath | Frankeniaceae
|
| FRPU4 | Frankenia pulverulenta L. | European seaheath | Frankeniaceae
|
| FRSA | Frankenia salina (Molina) I.M. Johnston | alkali seaheath | Frankeniaceae
|
| FRANK | Frankenia L. | seaheath | Frankeniaceae
|
| FRAL | Franklinia alatamaha Bartr. ex Marsh. | Franklin tree | Theaceae
|
| FRANK2 | Franklinia Bartr. ex Marsh. | Franklin tree | Theaceae
|
| FRAC2 | Franseria acanthicarpa (Hook.) Coville | Ambrosia acanthicarpa | Asteraceae
|
| FRAM3 | Franseria ambrosioides Cav. | Ambrosia ambrosioides | Asteraceae
|
| FRCHB | Franseria chamissonis Less. ssp. bipinnatisecta (Less.) Wiggins & Stockwell | Ambrosia chamissonis | Asteraceae
|
| FRCHB2 | Franseria chamissonis Less. var. bipinnatisecta Less. | Ambrosia chamissonis | Asteraceae
|
| FRCH4 | Franseria chamissonis Less. | Ambrosia chamissonis | Asteraceae
|
| FRCH5 | Franseria chenopodiifolia Benth. | Ambrosia chenopodiifolia | Asteraceae
|
| FRCO3 | Franseria confertiflora (DC.) Rydb. | Ambrosia confertiflora | Asteraceae
|
| FRCO4 | Franseria cordifolia Gray | Ambrosia cordifolia | Asteraceae
|
| FRDE3 | Franseria deltoidea Torr. | Ambrosia deltoidea | Asteraceae
|
| FRDI3 | Franseria discolor Nutt. | Ambrosia tomentosa | Asteraceae
|
| FRDU2 | Franseria dumosa Gray | Ambrosia dumosa | Asteraceae
|
| FRER2 | Franseria eriocentra Gray | Ambrosia eriocentra | Asteraceae
|
| FRIL2 | Franseria ilicifolia Gray | Ambrosia ilicifolia | Asteraceae
|
| FRLI4 | Franseria linearis Rydb. | Ambrosia linearis | Asteraceae
|
| FRPU5 | Franseria pumila Nutt. | Ambrosia pumila | Asteraceae
|
| FRST3 | Franseria strigulosa Rydb. | Ambrosia confertiflora | Asteraceae
|
| FRTO3 | Franseria tomentosa (Nutt.) A. Nels., non Gray | Ambrosia tomentosa | Asteraceae
|
| FRTO2 | Franseria tomentosa Gray | Ambrosia grayi | Asteraceae
|
| FRALN2 | Frasera albicaulis Dougl. ex Griseb. ssp. nitida (Benth.) D.M. Post | Frasera albicaulis var. nitida | Gentianaceae
|
| FRALA | Frasera albicaulis Dougl. ex Griseb. var. albicaulis | whitestem frasera | Gentianaceae
|
| FRALC | Frasera albicaulis Dougl. ex Griseb. var. columbiana (St. John) C.L. Hitchc. | whitestem frasera | Gentianaceae
|
| FRALC2 | Frasera albicaulis Dougl. ex Griseb. var. cusickii (Gray) C.L. Hitchc. | Cusick's frasera | Gentianaceae
|
| FRALI | Frasera albicaulis Dougl. ex Griseb. var. idahoensis (St. John) C.L. Hitchc. | Idaho frasera | Gentianaceae
|
| FRALM | Frasera albicaulis Dougl. ex Griseb. var. modocensis (St. John) N. Holmgren | Modoc frasera | Gentianaceae
|
| FRALN | Frasera albicaulis Dougl. ex Griseb. var. nitida (Benth.) C.L. Hitchc. | whitestem frasera | Gentianaceae
|
| FRAL2 | Frasera albicaulis Dougl. ex Griseb. | whitestem frasera | Gentianaceae
|
| FRALI2 | Frasera albomarginata S. Wats. var. induta (Tidestrom) Card | Frasera albomarginata | Gentianaceae
|
| FRALP | Frasera albomarginata S. Wats. var. purpusii Jepson | Frasera puberulenta | Gentianaceae
|
| FRAL5 | Frasera albomarginata S. Wats. | desert frasera | Gentianaceae
|
| FRAN4 | Frasera angustifolia (Rydb.) Rydb. | Frasera speciosa | Gentianaceae
|
| FRCA15 | Frasera caerulea Mulford | Frasera albicaulis var. cusickii | Gentianaceae
|
| FRCA2 | Frasera caroliniensis Walt. | American columbo | Gentianaceae
|
| FRCO6 | Frasera coerulea Mulford [orthographic variant] | Frasera albicaulis var. cusickii | Gentianaceae
|
| FRCO7 | Frasera coloradensis (Rogers) D.M. Post | Colorado frasera | Gentianaceae
|
| FRFA | Frasera fastigiata (Pursh) Heller | clustered green gentian | Gentianaceae
|
| FRGY | Frasera gypsicola (Barneby) D.M. Post | Sunnyside frasera | Gentianaceae
|
| FRMA | Frasera macrophylla Greene | Frasera speciosa | Gentianaceae
|
| FRMO | Frasera montana Mulford | white frasera | Gentianaceae
|
| FRNE | Frasera neglecta Hall | pine green gentian | Gentianaceae
|
| FRNIA | Frasera nitida Benth. var. albicaulis (Dougl. ex Griseb.) Card | Frasera albicaulis var. albicaulis | Gentianaceae
|
| FRNI2 | Frasera nitida Benth. | Frasera albicaulis var. nitida | Gentianaceae
|
| FROF | Frasera officinalis W. Bart. | Frasera caroliniensis | Gentianaceae
|
| FRPA6 | Frasera pahutensis Reveal | Frasera albicaulis var. modocensis | Gentianaceae
|
| FRPA2 | Frasera paniculata Torr. | tufted frasera | Gentianaceae
|
| FRPA3 | Frasera parryi Torr. | Coahuila frasera | Gentianaceae
|
| FRPU | Frasera puberulenta A. Davids. | Inyo frasera | Gentianaceae
|
| FRSPA | Frasera speciosa Dougl. ex Griseb. var. angustifolia Rydb. | Frasera speciosa | Gentianaceae
|
| FRSPS | Frasera speciosa Dougl. ex Griseb. var. stenosepala Rydb. | Frasera speciosa | Gentianaceae
|
| FRSP | Frasera speciosa Dougl. ex Griseb. | elkweed | Gentianaceae
|
| FRST2 | Frasera stenosepala (Rydb.) Rydb. | Frasera speciosa | Gentianaceae
|
| FRTU | Frasera tubulosa Coville | Kern frasera | Gentianaceae
|
| FRUM2 | Frasera umpquaensis M.E. Peck & Applegate | Frasera fastigiata | Gentianaceae
|
| FRVE3 | Frasera verticillata Raf. | Frasera caroliniensis | Gentianaceae
|
| FRWA | Frasera walteri Michx. | Frasera caroliniensis | Gentianaceae
|
| FRASE | Frasera Walt. | green gentian | Gentianaceae
|
| FRAMT | Fraxinus americana L. ssp. texensis (Gray) G.N. Mill. | Fraxinus texensis | Oleaceae
|
| FRAMB | Fraxinus americana L. var. biltmoreana (Beadle) J. Wright ex Fern. | Fraxinus americana | Oleaceae
|
| FRAMC | Fraxinus americana L. var. crassifolia Sarg. | Fraxinus americana | Oleaceae
|
| FRAMC2 | Fraxinus americana L. var. curtissii (Vasey) Small | Fraxinus americana | Oleaceae
|
| FRAMJ | Fraxinus americana L. var. juglandifolia (Lam.) Rehd. | Fraxinus americana | Oleaceae
|
| FRAMM | Fraxinus americana L. var. microcarpa Gray | Fraxinus americana | Oleaceae
|
| FRAMT2 | Fraxinus americana L. var. texensis Gray | Fraxinus texensis | Oleaceae
|
| FRAM2 | Fraxinus americana L. | white ash | Oleaceae
|
| FRANA | Fraxinus anomala Torr. ex S. Wats. var. anomala | singleleaf ash | Oleaceae
|
| FRANL | Fraxinus anomala Torr. ex S. Wats. var. lowellii (Sarg.) Little | singleleaf ash | Oleaceae
|
| FRAN2 | Fraxinus anomala Torr. ex S. Wats. | singleleaf ash | Oleaceae
|
| FRBE | Fraxinus berlandieriana DC. | Mexican ash | Oleaceae
|
| FRBI2 | Fraxinus biltmoreana Beadle | Fraxinus americana | Oleaceae
|
| FRCA8 | Fraxinus campestris Britt. | Fraxinus pennsylvanica | Oleaceae
|
| FRCAC4 | Fraxinus caroliniana P. Mill. var. cubensis (Griseb.) Lingelsh. | Fraxinus caroliniana | Oleaceae
|
| FRCAO3 | Fraxinus caroliniana P. Mill. var. oblanceolata (M.A. Curtis) Fern. & Schub. | Fraxinus caroliniana | Oleaceae
|
| FRCA3 | Fraxinus caroliniana P. Mill. | Carolina ash | Oleaceae
|
| FRCH6 | Fraxinus chinensis Roxb. | Chinese ash | Oleaceae
|
| FRCUM2 | Fraxinus cuspidata Torr. var. macropetala (Eastw.) Rehd. | Fraxinus cuspidata | Oleaceae
|
| FRCU | Fraxinus cuspidata Torr. | fragrant ash | Oleaceae
|
| FRDA | Fraxinus darlingtonii Britt. | Fraxinus pennsylvanica | Oleaceae
|
| FRDIT | Fraxinus dipetala Hook. & Arn. var. trifoliolata Torr. | Fraxinus dipetala | Oleaceae
|
| FRDI2 | Fraxinus dipetala Hook. & Arn. | California ash | Oleaceae
|
| FREX80 | Fraxinus excelsior L. | European ash | Oleaceae
|
| FRGO | Fraxinus gooddingii Little | Goodding's ash | Oleaceae
|
| FRGR2 | Fraxinus greggii Gray | Gregg's ash | Oleaceae
|
| FRJO3 | Fraxinus jonesii Lingelsh. | Fraxinus dipetala | Oleaceae
|
| FRLA3 | Fraxinus lanceolata Borkh. | Fraxinus pennsylvanica | Oleaceae
|
| FRLA | Fraxinus latifolia Benth. | Oregon ash | Oleaceae
|
| FRLO | Fraxinus lowellii Sarg. | Fraxinus anomala var. lowellii | Oleaceae
|
| FRMA5 | Fraxinus mandshurica Rupr. | Manchurian ash | Oleaceae
|
| FRMA3 | Fraxinus mariesii Hook. f. | Maries' ash | Oleaceae
|
| FRMI2 | Fraxinus michauxii Britt. | Fraxinus profunda | Oleaceae
|
| FRNI | Fraxinus nigra Marsh. | black ash | Oleaceae
|
| FROR3 | Fraxinus oregona Nutt. | Fraxinus latifolia | Oleaceae
|
| FROR2 | Fraxinus ornus L. | flowering ash | Oleaceae
|
| FRPA4 | Fraxinus papillosa Lingelsh. | Chihuahuan ash | Oleaceae
|
| FRPA8 | Fraxinus pauciflora Nutt. | Fraxinus caroliniana | Oleaceae
|
| FRPEO | Fraxinus pennsylvanica Marsh. ssp. oregana (Wesmael) G.N. Mill. | Fraxinus latifolia | Oleaceae
|