| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| FIPO2 | Fissidens polypodioides Hedw. | polypody fissidens moss | Fissidentaceae
|
| FIPU3 | Fissidens pusillus (Wils.) Milde | Fissidens bryoides | Fissidentaceae
|
| FIRA2 | Fissidens ravenelii Sull. | Ravenel's fissidens moss | Fissidentaceae
|
| FIRE6 | Fissidens reesei Crum & Anderson | Reese's fissidens moss | Fissidentaceae
|
| FIRE7 | Fissidens repandus Wils. | Fissidens bryoides | Fissidentaceae
|
| FIRU3 | Fissidens rufulus auct. Amer. | Fissidens ventricosus | Fissidentaceae
|
| FISU | Fissidens subbasilaris Hedw. | fissidens moss | Fissidentaceae
|
| FISU3 | Fissidens subcrenatus Schimp. in C. M�ll. | Fissidens pellucidus | Fissidentaceae
|
| FISU2 | Fissidens sublimbatus Grout | fissidens moss | Fissidentaceae
|
| FITA | Fissidens taxifolius Hedw. | fissidens moss | Fissidentaceae
|
| FITE | Fissidens texanus Lesq. & James | Fissidens bryoides | Fissidentaceae
|
| FITO2 | Fissidens tortilis Hampe & C. M�ll. | Fissidens bryoides | Fissidentaceae
|
| FIVE4 | Fissidens ventricosus Lesq. | fissidens moss | Fissidentaceae
|
| FIVIB | Fissidens viridulus (Sw.) Wahlenb. var. brevifolius (Ren. & Card.) Grout | Fissidens bryoides | Fissidentaceae
|
| FIVIT | Fissidens viridulus (Sw.) Wahlenb. var. tamarindifolius (Turn.) Grout | Fissidens bryoides | Fissidentaceae
|
| FIVIT2 | Fissidens viridulus (Sw.) Wahlenb. var. texanus (Lesq. & James) Grout | Fissidens bryoides | Fissidentaceae
|
| FIVI | Fissidens viridulus (Sw.) Wahlenb. | Fissidens bryoides | Fissidentaceae
|
| FIZO | Fissidens zollingeri Mont. | Zollinger's fissidens moss | Fissidentaceae
|
| FISSI2 | Fissidens Hedw. | fissidens moss | Fissidentaceae
|
| FIAC | Fissipes acaulis (Ait.) Small | Cypripedium acaule | Orchidaceae
|
| FIAL2 | Fistulariella almquistii (Vainio) Bowler & Rundel | Ramalina almquistii | Ramalinaceae
|
| FIGE5 | Fistulariella geniculata (Hook. f. & Taylor) Bowler & Rundel | Ramalina geniculata | Ramalinaceae
|
| FIIN3 | Fistulariella inflata (Hook. f. & Taylor) Bowler & Rundel | Ramalina inflata ssp. inflata | Ramalinaceae
|
| FIMI4 | Fistulariella minuscula (Nyl.) Bowler & Rundel | Ramalina dilacerata | Ramalinaceae
|
| FIRO | Fistulariella roesleri (Hochst. ex Schaerer) Bowler & Rundel | Ramalina roesleri | Ramalinaceae
|
| FISC2 | Fistulariella scoparia (Vainio) Bowler & Rundel | Ramalina scoparia | Ramalinaceae
|
| FISP3 | Fitchia speciosa Cheeseman | burrdaisytree | Asteraceae
|
| FITCH | Fitchia Hook. f. | fitchia | Asteraceae
|
| FLCA3 | Flacourtia cataphracta Roxb. ex Willd. | Flacourtia jangomas | Flacourtiaceae
|
| FLEU | Flacourtia euphlebia Merr. | Flacourtia rukam | Flacourtiaceae
|
| FLIN | Flacourtia indica (Burm. f.) Merr. | governor's plum | Flacourtiaceae
|
| FLIN3 | Flacourtia inermis Roxb. | batoko plum | Flacourtiaceae
|
| FLJA | Flacourtia jangomas (Lour.) Rausch. | Indian plum | Flacourtiaceae
|
| FLRA | Flacourtia ramontchi L'Her. | Flacourtia indica | Flacourtiaceae
|
| FLRU2 | Flacourtia rukam Zoll. & Moritzi | rukam | Flacourtiaceae
|
| FLACO | Flacourtia Comm. ex L'H�r. | flacourtia | Flacourtiaceae
|
| FLBI | Flaveria bidentis (L.) Kuntze | coastalplain yellowtops | Asteraceae
|
| FLBR2 | Flaveria brownii A. Powell | Brown's yellowtops | Asteraceae
|
| FLCA | Flaveria campestris J.R. Johnston | alkali yellowtops | Asteraceae
|
| FLCH | Flaveria chlorifolia Gray | clasping yellowtops | Asteraceae
|
| FLFL | Flaveria floridana J.R. Johnston | Florida yellowtops | Asteraceae
|
| FLLA | Flaveria �latifolia (J.R. Johnston) Long & Rhamstine | Flaveria linearis | Asteraceae
|
| FLLA2 | Flaveria latifolia (J.R. Johnston) Rydb. | Flaveria linearis | Asteraceae
|
| FLLI | Flaveria linearis Lag. | narrowleaf yellowtops | Asteraceae
|
| FLMA | Flaveria macdougalii Theroux, Pinkava & Keil | Macdougal's yellowtops | Asteraceae
|
| FLOP2 | Flaveria oppositifolia auct. non (DC.) Rydb. | Flaveria brownii | Asteraceae
|
| FLTR | Flaveria trinervia (Spreng.) C. Mohr | clustered yellowtops | Asteraceae
|
| FLAVE | Flaveria Juss. | yellowtops | Asteraceae
|
| FLCU | Flavocetraria cucullata (Bellardi) Karnefelt & Thell | | Parmeliaceae
|
| FLNI | Flavocetraria nivalis (L.) Karnefelt & Thell | | Parmeliaceae
|
| FLAVO3 | Flavocetraria Karnefelt & Thell | flavocetraria | Parmeliaceae
|
| FLBA | Flavoparmelia baltimorensis (Gyelnik & Foriss) Hale | | Parmeliaceae
|
| FLCA2 | Flavoparmelia caperata (L.) Hale | | Parmeliaceae
|
| FLCO | Flavoparmelia concreta (Stizenb.) | | Parmeliaceae
|
| FLRU | Flavoparmelia rutidota (Hook. f. & Taylor) Hale | | Parmeliaceae
|
| FLAVO | Flavoparmelia Hale | flavoparmelia | Parmeliaceae
|
| FLDA | Flavopunctelia darrowi (J. W. Thomson) Hale | | Parmeliaceae
|
| FLFL2 | Flavopunctelia flaventior (Stirton) Hale | | Parmeliaceae
|
| FLPR3 | Flavopunctelia praesignis (Nyl.) Hale | | Parmeliaceae
|
| FLSO2 | Flavopunctelia soredica (Nyl.) Hale | | Parmeliaceae
|
| FLAVO2 | Flavopunctelia (Krog) Hale | flavopunctelia | Parmeliaceae
|
| FLIN2 | Fleischmannia incarnata (Walt.) King & H.E. Robins. | pink thoroughwort | Asteraceae
|
| FLMI | Fleischmannia microstemon (Cass.) King & H.E. Robins. | tropical thoroughwort | Asteraceae
|
| FLPY | Fleischmannia pycnocephala (Less.) King & H.E. Robins. | lavender thoroughwort | Asteraceae
|
| FLSO | Fleischmannia sonorae (Gray) King & H.E. Robins. | Sonoran thoroughwort | Asteraceae
|
| FLEIS2 | Fleischmannia Schultz-Bip. | thoroughwort | Asteraceae
|
| FLST | Flemingia strobilifera (L.) Ait. & Ait. f. | wildhops | Fabaceae
|
| FLEMI | Flemingia Roxb. ex Ait. f. | flemingia | Fabaceae
|
| FLAE | Fleurya aestuans (L.) Gaud. | Laportea aestuans | Urticaceae
|
| FLBR | Flindersia brayleyana F. Muell. | Queensland maple | Rutaceae
|
| FLIND | Flindersia R. Br. | flindersia | Rutaceae
|
| FLOC | Floerkea occidentalis Rydb. | Floerkea proserpinacoides | Limnanthaceae
|
| FLPR | Floerkea proserpinacoides Willd. | false mermaidweed | Limnanthaceae
|
| FLVE | Floerkea versicolor Greene | Limnanthes alba ssp. versicolor | Limnanthaceae
|
| FLOER | Floerkea Willd. | floerkea | Limnanthaceae
|
| FLTR2 | Florestina tripteris DC. | sticky florestina | Asteraceae
|
| FLORE | Florestina Cass. | florestina | Asteraceae
|
| FLCE | Flourensia cernua DC. | American tarwort | Asteraceae
|
| FLPR2 | Flourensia pringlei (Gray) Blake | Pringle's tarwort | Asteraceae
|
| FLOUR | Flourensia DC. | tarwort | Asteraceae
|
| FLAC | Flueggea acidoton (L.) G.L. Webster | simpleleaf bushweed | Euphorbiaceae
|
| FLNE | Flueggea neowawraea W.J. Hayden | mehamehame | Euphorbiaceae
|
| FLVI | Flueggea virosa auct. non (Roxb. ex Willd.) Baill. | Flueggea acidoton | Euphorbiaceae
|
| FLUEG | Flueggea Willd. | bushweed | Euphorbiaceae
|
| FLFE | Fluminia festucacea (Willd.) A.S. Hitchc. | Scolochloa festucacea | Poaceae
|
| FLPA | Flyriella parryi (Gray) King & H.E. Robins. | Chisos Mountain brickellbush | Asteraceae
|
| FLYRI | Flyriella King & H.E. Robins. | brickellbush | Asteraceae
|
| FOFO | Foeniculum foeniculum (L.) Karst. | Foeniculum vulgare | Apiaceae
|
| FOVU | Foeniculum vulgare P. Mill. | sweet fennel | Apiaceae
|
| FOENI | Foeniculum P. Mill. | fennel | Apiaceae
|
| FOFO4 | Fontanesia fortunei Carr. | Fontanesia phillyreoides ssp. fortunei | Oleaceae
|
| FOPHF | Fontanesia phillyreoides Labill. ssp. fortunei (Carr.) Yaltirik | | Oleaceae
|
| FOPH2 | Fontanesia phillyreoides Labill. | | Oleaceae
|
| FONTA | Fontanesia Labill. | fontanesia | Oleaceae
|
| FOAL | Fontinalis allenii Card. in Nichols | Fontinalis antipyretica var. oregonensis | Fontinalaceae
|
| FOANA | Fontinalis antipyretica Hedw. var. antipyretica | antifever fontinalis moss | Fontinalaceae
|
| FOANG | Fontinalis antipyretica Hedw. var. gigantea (Sull.) Sull. | giant antifever fontinalis moss | Fontinalaceae
|
| FOANM | Fontinalis antipyretica Hedw. var. mollis (C. M�ll.) Welch in Grout | Fontinalis antipyretica var. antipyretica | Fontinalaceae
|
| FOANO | Fontinalis antipyretica Hedw. var. oregonensis Ren. & Card. | Oregon fontinalis moss | Fontinalaceae
|
| FOANP | Fontinalis antipyretica Hedw. var. patula (Card.) Welch | Fontinalis antipyretica var. antipyretica | Fontinalaceae
|
| FOAN2 | Fontinalis antipyretica Hedw. | antifever fontinalis moss | Fontinalaceae
|