| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| FRPEA | Fraxinus pennsylvanica Marsh. var. austinii Fern. | Fraxinus pennsylvanica | Oleaceae
|
| FRPEI | Fraxinus pennsylvanica Marsh. var. integerrima (Vahl) Fern. | Fraxinus pennsylvanica | Oleaceae
|
| FRPEL | Fraxinus pennsylvanica Marsh. var. lanceolata (Borkh.) Sarg. | Fraxinus pennsylvanica | Oleaceae
|
| FRPES | Fraxinus pennsylvanica Marsh. var. subintegerrima (Vahl) Fern. | Fraxinus pennsylvanica | Oleaceae
|
| FRPE | Fraxinus pennsylvanica Marsh. | green ash | Oleaceae
|
| FRPR | Fraxinus profunda (Bush) Bush | pumpkin ash | Oleaceae
|
| FRQU | Fraxinus quadrangulata Michx. | blue ash | Oleaceae
|
| FRSM | Fraxinus smallii Britt. | Fraxinus pennsylvanica | Oleaceae
|
| FRTE | Fraxinus texensis (Gray) Sarg. | Texas ash | Oleaceae
|
| FRTO | Fraxinus tomentosa Michx. f. | Fraxinus profunda | Oleaceae
|
| FRTR2 | Fraxinus trifoliolata (Torr.) Lewis & Epling | Fraxinus dipetala | Oleaceae
|
| FRUH | Fraxinus uhdei (Wenzig) Lingelsh. | shamel ash | Oleaceae
|
| FRVEC3 | Fraxinus velutina Torr. var. coriacea (S. Wats.) Rehd. | Fraxinus velutina | Oleaceae
|
| FRVEG | Fraxinus velutina Torr. var. glabra Rehd. | Fraxinus velutina | Oleaceae
|
| FRVET | Fraxinus velutina Torr. var. toumeyi (Britt.) Rehd. | Fraxinus velutina | Oleaceae
|
| FRVE2 | Fraxinus velutina Torr. | velvet ash | Oleaceae
|
| FRAXI | Fraxinus L. | ash | Oleaceae
|
| FRCO8 | Freesia corymbosa (Burm. f.) N.E. Br. | common freesia | Iridaceae
|
| FRLA5 | Freesia laxa (Thunb.) Goldblatt & J.C. Manning | false freesia | Iridaceae
|
| FRRE2 | Freesia refracta (Jacq.) Ecklon ex Klatt | Freesia corymbosa | Iridaceae
|
| FREES | Freesia Ecklon ex Klatt | freesia | Iridaceae
|
| FRCAC8 | Fremontia californica Torr. ssp. crassifolia (Eastw.) Abrams | Fremontodendron californicum | Sterculiaceae
|
| FRCAO | Fremontia californica Torr. ssp. obispoensis (Eastw.) Munz | Fremontodendron californicum | Sterculiaceae
|
| FRCAD2 | Fremontia californica Torr. var. diegensis M. Harvey | Fremontodendron californicum | Sterculiaceae
|
| FRCAI | Fremontia californica Torr. var. integra M. Harvey | Fremontodendron californicum | Sterculiaceae
|
| FRCAN2 | Fremontia californica Torr. var. napensis (Eastw.) McMinn | Fremontodendron californicum | Sterculiaceae
|
| FRCAT | Fremontia californica Torr. var. typica M. Harvey | Fremontodendron californicum | Sterculiaceae
|
| FRCAV | Fremontia californica Torr. var. viridis M. Harvey | Fremontodendron californicum | Sterculiaceae
|
| FRCA9 | Fremontia californica Torr. | Fremontodendron californicum | Sterculiaceae
|
| FRCR2 | Fremontia crassifolia Eastw. | Fremontodendron californicum | Sterculiaceae
|
| FRME3 | Fremontia mexicana (A. Davids.) J.F. Macbr. | Fremontodendron mexicanum | Sterculiaceae
|
| FRNA | Fremontia napensis Eastw. | Fremontodendron californicum | Sterculiaceae
|
| FROB | Fremontia obispoensis Eastw. | Fremontodendron californicum | Sterculiaceae
|
| FRCAC2 | Fremontodendron californicum (Torr.) Coville ssp. crassifolium (Eastw.) Thomas | Fremontodendron californicum | Sterculiaceae
|
| FRCAD | Fremontodendron californicum (Torr.) Coville ssp. decumbens (R. Lloyd) Munz | Fremontodendron decumbens | Sterculiaceae
|
| FRCAN | Fremontodendron californicum (Torr.) Coville ssp. napense (Eastw.) Munz | Fremontodendron californicum | Sterculiaceae
|
| FRCAO2 | Fremontodendron californicum (Torr.) Coville ssp. obispoense (Eastw.) Munz | Fremontodendron californicum | Sterculiaceae
|
| FRCA6 | Fremontodendron californicum (Torr.) Coville | California flannelbush | Sterculiaceae
|
| FRDE2 | Fremontodendron decumbens R. Lloyd | Pine Hill flannelbush | Sterculiaceae
|
| FRME2 | Fremontodendron mexicanum A. Davids. | Mexican flannelbush | Sterculiaceae
|
| FREMO2 | Fremontodendron Coville | flannelbush | Sterculiaceae
|
| FRAR | Freycinetia arborea Gaud. | 'ie'ie | Pandanaceae
|
| FRMA4 | Freycinetia mariannensis Merrill | freycinetia | Pandanaceae
|
| FRPO | Freycinetia ponapensis Martelli | freycinetia | Pandanaceae
|
| FRST4 | Freycinetia storckii Seem. | freycinetia | Pandanaceae
|
| FREYC | Freycinetia Gaud. | freycinetia | Pandanaceae
|
| FRAD | Fritillaria adamantina M.E. Peck | Fritillaria atropurpurea | Liliaceae
|
| FRAFA2 | Fritillaria affinis (Schultes) Sealy var. affinis | checker lily | Liliaceae
|
| FRAFT2 | Fritillaria affinis (Schultes) Sealy var. tristulis (A.L. Grant) B. Ness | checker lily | Liliaceae
|
| FRAF2 | Fritillaria affinis (Schultes) Sealy | checker lily | Liliaceae
|
| FRAG | Fritillaria agrestis Greene | stinkbells | Liliaceae
|
| FRATF | Fritillaria atropurpurea Nutt. var. falcata Jepson | Fritillaria falcata | Liliaceae
|
| FRATP | Fritillaria atropurpurea Nutt. var. pinetorum (A. Davids.) I.M. Johnston | Fritillaria pinetorum | Liliaceae
|
| FRAT | Fritillaria atropurpurea Nutt. | spotted fritillary | Liliaceae
|
| FRBII | Fritillaria biflora Lindl. var. ineziana Jepson | Fritillaria grayana | Liliaceae
|
| FRBII2 | Fritillaria biflora Lindl. var. inflexa Jepson | Fritillaria purdyi | Liliaceae
|
| FRBI | Fritillaria biflora Lindl. | chocolate lily | Liliaceae
|
| FRBR | Fritillaria brandegeei Eastw. | greenhorn fritillary | Liliaceae
|
| FRCAF | Fritillaria camschatcensis (L.) Ker-Gawl. var. floribunda (Benth.) Boivin | Fritillaria affinis var. affinis | Liliaceae
|
| FRCA5 | Fritillaria camschatcensis (L.) Ker-Gawl. | Kamchatka fritillary | Liliaceae
|
| FRCO5 | Fritillaria coccinea (Greene) Greene | Fritillaria recurva | Liliaceae
|
| FREA | Fritillaria eastwoodiae Macfarlane | Butte County fritillary | Liliaceae
|
| FREX | Fritillaria eximia Eastw. | Fritillaria affinis var. affinis | Liliaceae
|
| FRFA2 | Fritillaria falcata (Jepson) D.E. Beetle | talus fritillary | Liliaceae
|
| FRGE | Fritillaria gentneri Gilkey | Gentner's fritillary | Liliaceae
|
| FRGL | Fritillaria glauca Greene | Siskiyou fritillary | Liliaceae
|
| FRGR7 | Fritillaria gracillima Smiley | Fritillaria atropurpurea | Liliaceae
|
| FRGR4 | Fritillaria grayana Reichenb. f. & Baker | Gray's fritillary | Liliaceae
|
| FRHU | Fritillaria hutchinsonii A. Davids. | Fritillaria brandegeei | Liliaceae
|
| FRIM | Fritillaria imperialis L. | imperial fritillary | Liliaceae
|
| FRKA | Fritillaria kamtschatcensis Torr. | Fritillaria biflora | Liliaceae
|
| FRLAT | Fritillaria lanceolata Pursh var. tristulis A.L. Grant | Fritillaria affinis var. tristulis | Liliaceae
|
| FRLA2 | Fritillaria lanceolata Pursh | Fritillaria affinis var. affinis | Liliaceae
|
| FRLI5 | Fritillaria liliacea Benth. | Fritillaria agrestis | Liliaceae
|
| FRLI2 | Fritillaria liliacea Lindl. | fragrant fritillary | Liliaceae
|
| FRLI3 | Fritillaria liliacea Torr. | Fritillaria recurva | Liliaceae
|
| FRME5 | Fritillaria meleagris L. | chequered lily | Liliaceae
|
| FRMI | Fritillaria micrantha Heller | brown fritillary | Liliaceae
|
| FRMU4 | Fritillaria multiflora Kellogg | Fritillaria micrantha | Liliaceae
|
| FRMU2 | Fritillaria multiscapoidea Kellogg | Erythronium multiscapoideum | Liliaceae
|
| FRMUG | Fritillaria mutica Lindl. var. gracilis (S. Wats.) Jepson | Fritillaria affinis var. affinis | Liliaceae
|
| FRMU3 | Fritillaria mutica Lindl. | Fritillaria affinis var. affinis | Liliaceae
|
| FROJ | Fritillaria ojaiensis A. Davids. | Ojai fritillary | Liliaceae
|
| FRPA7 | Fritillaria parviflora Torr. | Fritillaria micrantha | Liliaceae
|
| FRPH | Fritillaria phaeanthera Eastw. | Fritillaria eastwoodiae | Liliaceae
|
| FRPI | Fritillaria pinetorum A. Davids. | pinewoods fritillary | Liliaceae
|
| FRPL | Fritillaria pluriflora Torr. ex Benth. | adobe lily | Liliaceae
|
| FRPU2 | Fritillaria pudica (Pursh) Spreng. | yellow fritillary | Liliaceae
|
| FRPU3 | Fritillaria purdyi Eastw. | Purdy's fritillary | Liliaceae
|
| FRPU6 | Fritillaria purpusii Purdy | Fritillaria micrantha | Liliaceae
|
| FRREC | Fritillaria recurva Benth. var. coccinea Greene | Fritillaria recurva | Liliaceae
|
| FRRE | Fritillaria recurva Benth. | scarlet fritillary | Liliaceae
|
| FRRO | Fritillaria roderickii Knight | Fritillaria grayana | Liliaceae
|
| FRST | Fritillaria striata Eastw. | striped abobe lily | Liliaceae
|
| FRSU2 | Fritillaria succulenta Elmer | Fritillaria agrestis | Liliaceae
|
| FRVI2 | Fritillaria viridea Kellogg | San Benito fritillary | Liliaceae
|
| FRITI | Fritillaria L. | fritillary | Liliaceae
|
| FRAR2 | Froelichia arizonica Thornb. ex Standl. | Arizona snakecotton | Amaranthaceae
|
| FRBR2 | Froelichia braunii Standl. | Froelichia gracilis | Amaranthaceae
|
| FRCA7 | Froelichia campestris Small | Froelichia floridana var. campestris | Amaranthaceae
|
| FRDR | Froelichia drummondii Moq. | Drummond's snakecotton | Amaranthaceae
|