| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| FRFLF | Froelichia floridana (Nutt.) Moq. var. floridana | plains snakecotton | Amaranthaceae
|
| FRFL | Froelichia floridana (Nutt.) Moq. | plains snakecotton | Amaranthaceae
|
| FRGR3 | Froelichia gracilis (Hook.) Moq. | slender snakecotton | Amaranthaceae
|
| FRIN | Froelichia interrupta (L.) Moq. | Texas snakecotton | Amaranthaceae
|
| FROEL | Froelichia Moench | snakecotton | Amaranthaceae
|
| FRAP2 | Frullania appalachiana R. M. Schust. | | Jubulaceae
|
| FRAR3 | Frullania arietina Taylor | | Jubulaceae
|
| FRAS | Frullania asagrayana Mont. | | Jubulaceae
|
| FRBO | Frullania bolanderi Austin | | Jubulaceae
|
| FRBR4 | Frullania brittoniae A. Evans | | Jubulaceae
|
| FRCA16 | Frullania californica (Austin) A. Evans | | Jubulaceae
|
| FRCA17 | Frullania catalinae A. Evans | | Jubulaceae
|
| FRCH7 | Frullania chilcootiensis Steph. | | Jubulaceae
|
| FRCO9 | Frullania cobrensis Gottsche ex Steph. | | Jubulaceae
|
| FRCU3 | Frullania cucullata Lindenb. & Gottsche | | Jubulaceae
|
| FRDO | Frullania donnellii Austin | | Jubulaceae
|
| FREB | Frullania eboracensis Gottsche | | Jubulaceae
|
| FRER3 | Frullania ericoides (Nees) Nees | | Jubulaceae
|
| FRFR | Frullania franciscana M. Howe | | Jubulaceae
|
| FRGI | Frullania gibbosa Nees | | Jubulaceae
|
| FRGY2 | Frullania gymnotis Nees & Mont. | | Jubulaceae
|
| FRHA2 | Frullania hattoriana J. D. Godfrey & G. Godfrey | | Jubulaceae
|
| FRINC | Frullania inflata Gottsche var. communis R. M. Schust. | | Jubulaceae
|
| FRINI | Frullania inflata Gottsche var. inflata | | Jubulaceae
|
| FRIN4 | Frullania inflata Gottsche | | Jubulaceae
|
| FRJA2 | Frullania jackii Gottsche | | Jubulaceae
|
| FRKUK | Frullania kunzei Lehm. & Lindenb. var. kunzei | | Jubulaceae
|
| FRKUM | Frullania kunzei Lehm. & Lindenb. var. maritima R. M. Schust. | | Jubulaceae
|
| FRKU | Frullania kunzei Lehm. & Lindenb. | | Jubulaceae
|
| FRNI3 | Frullania nisquallensis Sull. | | Jubulaceae
|
| FROA2 | Frullania oakesiana Austin | | Jubulaceae
|
| FROB2 | Frullania obcordata (Lehm. & Lindenb.) Lehm. & Lindenb. | | Jubulaceae
|
| FRPL3 | Frullania plana Sull. | | Jubulaceae
|
| FRRI | Frullania riojaneirensis (Raddi) Spruce | | Jubulaceae
|
| FRRI2 | Frullania riparia Hampe ex Lehm. | | Jubulaceae
|
| FRSA4 | Frullania sabaliana R. M. Schust. | | Jubulaceae
|
| FRSE | Frullania selwyniana Pearson | | Jubulaceae
|
| FRST5 | Frullania stylifera (R. M. Schust.) R. M. Schust. | | Jubulaceae
|
| FRTA | Frullania taxodiocola R. M. Schust. | | Jubulaceae
|
| FRULL | Frullania Raddi | | Jubulaceae
|
| FRBA | Frullanoides bahamensis (A. Evans) Slageren | | Lejeuneaceae
|
| FRCO10 | Frullanoides corticalis (Lehm. & Lindenb.) Slageren | | Lejeuneaceae
|
| FRULL2 | Frullanoides Slageren | | Lejeuneaceae
|
| FRCA14 | Frutidella caesioatra (Schaerer) Kalb | | Lecideaceae
|
| FRUTI | Frutidella Kalb | frutidella | Lecideaceae
|
| FRPY | Fryxellia pygmaea (Correll) Bates | small fryxellwort | Malvaceae
|
| FRYXE | Fryxellia Bates | fryxellwort | Malvaceae
|
| FUAN | Fuchsia andrei I.M. Johnston | Andre's fuchsia | Onagraceae
|
| FUBO | Fuchsia boliviana Carr. | Bolivian fuchsia | Onagraceae
|
| FUHY2 | Fuchsia hybrida hort. ex Sieb. & Voss | hybrid fuchsia | Onagraceae
|
| FUMA | Fuchsia magellanica Lam. | hardy fuchsia | Onagraceae
|
| FUPA2 | Fuchsia paniculata Lindl. | shrubby fuchsia | Onagraceae
|
| FUVU | Fuchsia vulcanica Andre. | Volcan's fuchsia | Onagraceae
|
| FUCHS | Fuchsia L. | fuchsia | Onagraceae
|
| FUBR | Fuirena breviseta (Coville) Coville | saltmarsh umbrella-sedge | Cyperaceae
|
| FUBU | Fuirena bushii Kral | Bush's umbrella-sedge | Cyperaceae
|
| FUCA5 | Fuirena caerulescens Steud. | | Cyperaceae
|
| FUCI | Fuirena ciliata Bush | Fuirena bushii | Cyperaceae
|
| FUCO | Fuirena coerulescens Steud. [orthographic variant] | Fuirena caerulescens | Cyperaceae
|
| FUHI2 | Fuirena hispida Ell. | Fuirena squarrosa | Cyperaceae
|
| FULO | Fuirena longa Chapman | coastalplain umbrella-sedge | Cyperaceae
|
| FUPU | Fuirena pumila (Torr.) Spreng. | dwarf umbrella-sedge | Cyperaceae
|
| FUSC | Fuirena scirpoidea Michx. | southern umbrella-sedge | Cyperaceae
|
| FUSIA | Fuirena simplex Vahl var. aristulata (Torr.) Kral | western umbrella-sedge | Cyperaceae
|
| FUSIS | Fuirena simplex Vahl var. simplex | western umbrella-sedge | Cyperaceae
|
| FUSI | Fuirena simplex Vahl | western umbrella-sedge | Cyperaceae
|
| FUSQA | Fuirena squarrosa Michx. var. aristulata Torr. | Fuirena simplex var. aristulata | Cyperaceae
|
| FUSQB | Fuirena squarrosa Michx. var. breviseta Coville | Fuirena breviseta | Cyperaceae
|
| FUSQP | Fuirena squarrosa Michx. var. pumila Torr. | Fuirena pumila | Cyperaceae
|
| FUSQ | Fuirena squarrosa Michx. | hairy umbrella-sedge | Cyperaceae
|
| FUTO | Fuirena torreyana Beck | Fuirena pumila | Cyperaceae
|
| FUUM | Fuirena umbellata Rottb. | yefen | Cyperaceae
|
| FUIRE | Fuirena Rottb. | umbrella-sedge | Cyperaceae
|
| FUBRA | Fulgensia bracteata (Hoffm.) Rasanen var. alpina (Th. Fr.) Poelt | sulphur lichen | Teloschistaceae
|
| FUBR60 | Fulgensia bracteata (Hoffm.) Rasanen | bracted sulphur lichen | Teloschistaceae
|
| FUDE | Fulgensia desertorum (Tomin) Poelt | desert sulphur lichen | Teloschistaceae
|
| FUFU | Fulgensia fulgens (Sw.) Elenkin | sulphur lichen | Teloschistaceae
|
| FULGE2 | Fulgensia A. Massal. & De Not. | sulphur lichen | Teloschistaceae
|
| FUCA | Fumaria capreolata L. | white ramping fumitory | Fumariaceae
|
| FUFL | Fumaria flavula Raf. | Corydalis flavula | Fumariaceae
|
| FUOC | Fumaria occidentalis Pugsley | western fumitory | Fumariaceae
|
| FUOFO | Fumaria officinalis L. ssp. officinalis | drug fumitory | Fumariaceae
|
| FUOFW | Fumaria officinalis L. ssp. wirtgenii (W.D.J. Koch) Arcang. | drug fumitory | Fumariaceae
|
| FUOFW2 | Fumaria officinalis L. var. wirtgenii (W.D.J. Koch) Hausskn. | Fumaria officinalis ssp. wirtgenii | Fumariaceae
|
| FUOF | Fumaria officinalis L. | drug fumitory | Fumariaceae
|
| FUOF2 | Fumaria officinalis auct. non L. | Fumaria vaillantii | Fumariaceae
|
| FUPA | Fumaria parviflora Lam. | fineleaf fumitory | Fumariaceae
|
| FUVA | Fumaria vaillantii Loisel. | earthsmoke | Fumariaceae
|
| FUMAR | Fumaria L. | fumitory | Fumariaceae
|
| FUAM | Funaria americana Lindb. in Sull. | American funaria moss | Funariaceae
|
| FUAP | Funaria apiculatopilosa Card. | apiculate funaria moss | Funariaceae
|
| FUAR70 | Funaria arctica (Berggr.) Kindb. | arctic funaria moss | Funariaceae
|
| FUCA3 | Funaria calcarea Wahlenb. | Funaria muhlenbergii | Funariaceae
|
| FUCA4 | Funaria californica Sull. & Lesq. | Entosthodon californicus | Funariaceae
|
| FUCA2 | Funaria calvescens Schwaegr. | funaria moss | Funariaceae
|
| FUFL2 | Funaria flavicans Michx. | funaria moss | Funariaceae
|
| FUGR | Funaria groutiana Fife | funaria moss | Funariaceae
|
| FUHYA | Funaria hygrometrica Hedw. var. arctica Berggr. | Funaria arctica | Funariaceae
|
| FUHYC | Funaria hygrometrica Hedw. var. calvescens (Schwaegr.) Mont. | Funaria calvescens | Funariaceae
|
| FUHYC2 | Funaria hygrometrica Hedw. var. convoluta (Hampe) Grout | Funaria hygrometrica | Funariaceae
|
| FUHYP | Funaria hygrometrica Hedw. var. patula Bruch & Schimp. in B.S.G. | Funaria hygrometrica | Funariaceae
|