| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| FUHY70 | Funaria hygrometrica Hedw. | funaria moss | Funariaceae
|
| FUME | Funaria mediterranea Lindb. | Funaria muhlenbergii | Funariaceae
|
| FUMIO | Funaria microstoma Bruch ex Schimp. var. obtusifolia Grout | Funaria groutiana | Funariaceae
|
| FUMI | Funaria microstoma Bruch ex Schimp. | funaria moss | Funariaceae
|
| FUMUL | Funaria muhlenbergii Turn. var. lineata Grout | Funaria muhlenbergii | Funariaceae
|
| FUMUP | Funaria muhlenbergii Turn. var. patula (Bruch & Schimp. in B.S.G.) Schimp. | Funaria muhlenbergii | Funariaceae
|
| FUMU2 | Funaria muhlenbergii Hedw. f. ex Turn. 1804 (non Turn. 1805) nec Lam & DC. | Funaria americana | Funariaceae
|
| FUMU | Funaria muhlenbergii Turn. | Muhlenberg's funaria moss | Funariaceae
|
| FUOR | Funaria orcuttii Bartr. | Funaria apiculatopilosa | Funariaceae
|
| FUPO70 | Funaria polaris Bryhn | northern funaria moss | Funariaceae
|
| FUSE2 | Funaria serrata Brid. | serrate funaria moss | Funariaceae
|
| FUNAR2 | Funaria Hedw. | funaria moss | Funariaceae
|
| FUCL | Funastrum clausum (Jacq.) Schlechter | white twinevine | Asclepiadaceae
|
| FUCR | Funastrum crispum (Benth.) Schlechter | wavyleaf twinevine | Asclepiadaceae
|
| FUCYC | Funastrum cynanchoides (Dcne.) Schlechter ssp. cynanchoides | fringed twinevine | Asclepiadaceae
|
| FUCYH | Funastrum cynanchoides (Dcne.) Schlechter ssp. heterophyllum (Vail) Kartesz, comb. nov. ined. | Hartweg's twinevine | Asclepiadaceae
|
| FUCYS | Funastrum cynanchoides (Dcne.) Schlechter var. subtruncatum (B.L. Robins. & Fern.) J.F. Macbr. | Funastrum cynanchoides ssp. cynanchoides | Asclepiadaceae
|
| FUCY | Funastrum cynanchoides (Dcne.) Schlechter | fringed twinevine | Asclepiadaceae
|
| FUHE | Funastrum heterophyllum (Engelm. ex Torr.) Standl. | Funastrum cynanchoides ssp. heterophyllum | Asclepiadaceae
|
| FUHI | Funastrum hirtellum (Gray) Schlechter | hairy milkweed | Asclepiadaceae
|
| FULI | Funastrum lineare (Dcne.) J.F. Macbr. | Funastrum cynanchoides ssp. heterophyllum | Asclepiadaceae
|
| FUTO2 | Funastrum torreyi (Gray) Schlechter | soft twinevine | Asclepiadaceae
|
| FUNAS | Funastrum Fourn. | twinevine | Asclepiadaceae
|
| FUAF | Funtumia africana (Benth.) Stapf | Lagos silkrubbertree | Apocynaceae
|
| FUEL | Funtumia elastica (Preuss) Stapf | silkrubber | Apocynaceae
|
| FUNTU | Funtumia Stapf | funtumia | Apocynaceae
|
| FUFO | Furcraea foetida (L.) Haw. | Mauritius hemp | Agavaceae
|
| FUGI | Furcraea gigantea Vent. | Furcraea foetida | Agavaceae
|
| FUHE2 | Furcraea hexapetala (Jacq.) Urban | Cuban hemp | Agavaceae
|
| FUSE | Furcraea selloa K. Koch | wild sisal | Agavaceae
|
| FUTU | Furcraea tuberosa (P. Mill.) Ait. f. | female karata | Agavaceae
|
| FURCR | Furcraea Vent. | furcraea | Agavaceae
|
| FUAR2 | Fuscidea arboricola Coppins & Tonsberg | | Fuscideaceae
|
| FUCY2 | Fuscidea cyathoides (Ach.) V. Wirth & Vezda | | Fuscideaceae
|
| FUGY | Fuscidea gyrodes (H. Magn.) | | Fuscideaceae
|
| FUIN | Fuscidea intercincta (Nyl.) Poelt | | Fuscideaceae
|
| FUKO | Fuscidea kochiana (Hepp) V. Wirth & Vezda | | Fuscideaceae
|
| FULI2 | Fuscidea lightfootii (Sm.) Coppins & P. James | | Fuscideaceae
|
| FULO2 | Fuscidea lowensis (H. Magn.) R. Anderson & Hertel | | Fuscideaceae
|
| FUMO | Fuscidea mollis (Wahlenb.) V. Wirth & Vezda | | Fuscideaceae
|
| FUPL | Fuscidea placidensis (H. Magn.) R. C. Harris | Lecanora placidensis | Lecanoraceae
|
| FUPR | Fuscidea praeruptorum (Du Rietz & H. Magn.) V. Wirth & Vezda | | Fuscideaceae
|
| FUPU2 | Fuscidea pusilla Tonsberg | | Fuscideaceae
|
| FURE2 | Fuscidea recensa (Stirton) Hertel, V. Wirth & Vezda | | Fuscideaceae
|
| FUSU | Fuscidea subfilamentosa (Zahlbr.) Brako | | Fuscideaceae
|
| FUSU2 | Fuscidea subreagens (H. Magn.) Oberholl. & V. Wirth | | Fuscideaceae
|
| FUSCI | Fuscidea V. Wirth & Vezda | fuscidea | Fuscideaceae
|
| FUAH | Fuscopannaria ahlneri (P. M. Jorg.) P. M. Jorg. | | Pannariaceae
|
| FULA | Fuscopannaria laceratula (Hue) P. M. Jorg. | | Pannariaceae
|
| FULE | Fuscopannaria leucophaea (Tuck.) P. M. Jorg. | | Pannariaceae
|
| FULE2 | Fuscopannaria leucosticta (Tuck.) P. M. Jorg. | | Pannariaceae
|
| FULE3 | Fuscopannaria leucostictoides (Ohlsson) P. M. Jorg. | | Pannariaceae
|
| FUMA4 | Fuscopannaria maritima (P. M. Jorg.) P. M. Jorg. | | Pannariaceae
|
| FUME2 | Fuscopannaria mediterranea (Tav.) P. M. Jorg. | | Pannariaceae
|
| FUPR2 | Fuscopannaria praetermissa (Nyl.) P. M. Jorg. | | Pannariaceae
|
| FUPU3 | Fuscopannaria pulveracea (P. M. Jorg. & Henssen) P. M. Jorg. | | Pannariaceae
|
| FUSA | Fuscopannaria saubinetii (Mont.) P. M. Jorg. | | Pannariaceae
|
| FUSCO | Fuscopannaria P. M. Jorg. | fuscopannaria | Pannariaceae
|
| GALA13 | Gadellia lactiflora (Bieb.) Schulkina | milky bellflower | Campanulaceae
|
| GADEL | Gadellia Schulkina | gadellia | Campanulaceae
|
| GATO2 | Gaertnera tomentosa (Gray) Kuntze | Ambrosia grayi | Asteraceae
|
| GAAC2 | Gaertneria acanthicarpa (Hook.) Britt. | Ambrosia acanthicarpa | Asteraceae
|
| GADI3 | Gaertneria discolor (Nutt.) Kuntze | Ambrosia tomentosa | Asteraceae
|
| GAGR7 | Gaertneria grayi A. Nels. | Ambrosia grayi | Asteraceae
|
| GATE6 | Gaertneria tenuifolia Harvey & Gray | Ambrosia confertiflora | Asteraceae
|
| GATO3 | Gaertneria tomentosa (Nutt.) Heller | Ambrosia tomentosa | Asteraceae
|
| GAFI6 | Gagea fistulosa Ker-Gawl. | Star of Bethlehem | Liliaceae
|
| GAVI9 | Gagea villosa (Bieb.) Duby | | Liliaceae
|
| GAGEA | Gagea Salisb. | gagea | Liliaceae
|
| GAASG | Gahnia aspera Spreng. ssp. globosa (Mann) J. Kern | round sawsedge | Cyperaceae
|
| GAAS5 | Gahnia aspera Spreng. | round sawsedge | Cyperaceae
|
| GABE | Gahnia beecheyi Mann | forest sawsedge | Cyperaceae
|
| GAGA3 | Gahnia gahniiformis (Gaud.) Heller | Gaudichaud's sawsedge | Cyperaceae
|
| GAGL | Gahnia globosa Mann | Gahnia aspera ssp. globosa | Cyperaceae
|
| GAKA2 | Gahnia kauaiensis Benl | Gahnia vitiensis ssp. kauaiensis | Cyperaceae
|
| GALA7 | Gahnia lanaiensis O.& I. Deg. & J. Kern | Lanai sawsedge | Cyperaceae
|
| GAVIK | Gahnia vitiensis Rendle ssp. kauaiensis (Benl) T. Koyama | Kauai sawsedge | Cyperaceae
|
| GAVI3 | Gahnia vitiensis Rendle | Fijian sawsedge | Cyperaceae
|
| GAHNI | Gahnia J.R. & G. Forst. | sawsedge | Cyperaceae
|
| GAAEA | Gaillardia aestivalis (Walt.) H. Rock var. aestivalis | lanceleaf blanketflower | Asteraceae
|
| GAAEF | Gaillardia aestivalis (Walt.) H. Rock var. flavovirens (C. Mohr) Cronq. | lanceleaf blanketflower | Asteraceae
|
| GAAEW | Gaillardia aestivalis (Walt.) H. Rock var. winkleri (Cory) B.L. Turner | Winkler's blanketflower | Asteraceae
|
| GAAE | Gaillardia aestivalis (Walt.) H. Rock | lanceleaf blanketflower | Asteraceae
|
| GAAM | Gaillardia amblyodon J. Gay | maroon blanketflower | Asteraceae
|
| GAAR | Gaillardia aristata Pursh | common gaillardia | Asteraceae
|
| GAARA | Gaillardia arizonica Gray var. arizonica | Arizona blanketflower | Asteraceae
|
| GAARP2 | Gaillardia arizonica Gray var. pringlei (Rydb.) Blake | Pringle's blanketflower | Asteraceae
|
| GAAR2 | Gaillardia arizonica Gray | Arizona blanketflower | Asteraceae
|
| GACH2 | Gaillardia chrysantha Small | Gaillardia aestivalis var. aestivalis | Asteraceae
|
| GACO7 | Gaillardia coahuilensis B.L. Turner | bandanna daisy | Asteraceae
|
| GADR2 | Gaillardia drummondii (Hook.) DC. | Gaillardia pulchella var. pulchella | Asteraceae
|
| GAFA4 | Gaillardia fastigiata Greene | Gaillardia aestivalis var. aestivalis | Asteraceae
|
| GAFL | Gaillardia flava Rydb. | yellow blanketflower | Asteraceae
|
| GAGR6 | Gaillardia gracilis A. Nels. | Gaillardia pinnatifida var. pinnatifida | Asteraceae
|
| GAGR11 | Gaillardia �grandiflora Van Houtte | | Asteraceae
|
| GALAF | Gaillardia lanceolata Michx. var. fastigiata (Greene) Waterfall | Gaillardia aestivalis var. aestivalis | Asteraceae
|
| GALAF2 | Gaillardia lanceolata Michx. var. flavovirens C. Mohr | Gaillardia aestivalis var. flavovirens | Asteraceae
|
| GALA8 | Gaillardia lanceolata Michx. | Gaillardia aestivalis var. aestivalis | Asteraceae
|
| GALUW | Gaillardia lutea Greene var. winkleri Cory | Gaillardia aestivalis var. winkleri | Asteraceae
|
| GALU2 | Gaillardia lutea Greene | Gaillardia aestivalis var. flavovirens | Asteraceae
|
| GAME | Gaillardia mearnsii Rydb. | Gaillardia pinnatifida var. pinnatifida | Asteraceae
|