| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| RAADT | Ranunculus adoneus Gray var. typicus L. Benson | Ranunculus adoneus var. adoneus | Ranunculaceae
|
| RAAD | Ranunculus adoneus Gray | alpine buttercup | Ranunculaceae
|
| RAAE | Ranunculus aestivalis (L. Benson) Van Buren & Harper | fall buttercup | Ranunculaceae
|
| RAAFM | Ranunculus affinis R. Br. var. micropetalus Greene | Ranunculus inamoenus var. inamoenus | Ranunculaceae
|
| RAAF | Ranunculus affinis R. Br. | Ranunculus pedatifidus var. affinis | Ranunculaceae
|
| RAALA | Ranunculus alismifolius Geyer ex Benth. var. alismellus Gray | plantainleaf buttercup | Ranunculaceae
|
| RAALA2 | Ranunculus alismifolius Geyer ex Benth. var. alismifolius | plantainleaf buttercup | Ranunculaceae
|
| RAALD | Ranunculus alismifolius Geyer ex Benth. var. davisii L. Benson | Davis' buttercup | Ranunculaceae
|
| RAALH | Ranunculus alismifolius Geyer ex Benth. var. hartwegii (Greene) Jepson | Ranunculus alismifolius var. alismifolius | Ranunculaceae
|
| RAALL | Ranunculus alismifolius Geyer ex Benth. var. lemmonii (Gray) L. Benson | Ranunculus alismifolius var. alismifolius | Ranunculaceae
|
| RAALM | Ranunculus alismifolius Geyer ex Benth. var. montanus S. Wats. | waterplantain buttercup | Ranunculaceae
|
| RAALT | Ranunculus alismifolius Geyer ex Benth. var. typicus L. Benson | Ranunculus alismifolius var. alismifolius | Ranunculaceae
|
| RAAL | Ranunculus alismifolius Geyer ex Benth. | plantainleaf buttercup | Ranunculaceae
|
| RAAL2 | Ranunculus allegheniensis Britt. | Allegheny Mountain buttercup | Ranunculaceae
|
| RAAL5 | Ranunculus alpeophilus A. Nels. | Ranunculus inamoenus var. alpeophilus | Ranunculaceae
|
| RAAL3 | Ranunculus alveolatus Carter | Ranunculus bonariensis var. trisepalus | Ranunculaceae
|
| RAAM | Ranunculus ambigens S. Wats. | waterplantain spearwort | Ranunculaceae
|
| RAAM2 | Ranunculus amphibius James | Ranunculus longirostris | Ranunculaceae
|
| RAANA | Ranunculus andersonii Gray var. andersonii | Anderson's buttercup | Ranunculaceae
|
| RAANJ | Ranunculus andersonii Gray var. juniperinus (M.E. Jones) Welsh | Ranunculus andersonii var. tenellus | Ranunculaceae
|
| RAANT | Ranunculus andersonii Gray var. tenellus S. Wats. | Anderson's buttercup | Ranunculaceae
|
| RAAN | Ranunculus andersonii Gray | Anderson's buttercup | Ranunculaceae
|
| RAAQC3 | Ranunculus aquatilis L. var. calvescens (W. Drew) L. Benson | Ranunculus trichophyllus var. trichophyllus | Ranunculaceae
|
| RAAQC2 | Ranunculus aquatilis L. var. capillaceus (Thuill.) DC. | Ranunculus trichophyllus var. trichophyllus | Ranunculaceae
|
| RAAQC5 | Ranunculus aquatilis L. var. codyanus Boivin | Ranunculus trichophyllus var. eradicatus | Ranunculaceae
|
| RAAQC4 | Ranunculus aquatilis L. var. confervoides (Fries) Lawson | Ranunculus trichophyllus var. eradicatus | Ranunculaceae
|
| RAAQD | Ranunculus aquatilis L. var. diffusus Withering p.p. | Ranunculus longirostris | Ranunculaceae
|
| RAAQD | Ranunculus aquatilis L. var. diffusus Withering p.p. | Ranunculus trichophyllus var. eradicatus | Ranunculaceae
|
| RAAQD | Ranunculus aquatilis L. var. diffusus Withering p.p. | Ranunculus trichophyllus var. trichophyllus | Ranunculaceae
|
| RAAQE2 | Ranunculus aquatilis L. var. eradicatus Laestad. | Ranunculus trichophyllus var. eradicatus | Ranunculaceae
|
| RAAQH2 | Ranunculus aquatilis L. var. harrisii L. Benson | Ranunculus trichophyllus var. trichophyllus | Ranunculaceae
|
| RAAQH | Ranunculus aquatilis L. var. hispidulus E. Drew | Ranunculus aquatilis | Ranunculaceae
|
| RAAQL3 | Ranunculus aquatilis L. var. lalondei L. Benson | Ranunculus trichophyllus var. trichophyllus | Ranunculaceae
|
| RAAQL | Ranunculus aquatilis L. var. lobbii (Hiern.) S. Wats. | Ranunculus lobbii | Ranunculaceae
|
| RAAQL2 | Ranunculus aquatilis L. var. longirostris (Godr.) Lawson | Ranunculus longirostris | Ranunculaceae
|
| RAAQP2 | Ranunculus aquatilis L. var. porteri (Britt.) L. Benson | Ranunculus trichophyllus var. trichophyllus | Ranunculaceae
|
| RAAQS | Ranunculus aquatilis L. var. subrigidus (W. Drew) Breitung | Ranunculus longirostris | Ranunculaceae
|
| RAAQT2 | Ranunculus aquatilis L. var. trichophyllus (Chaix) Gray | Ranunculus trichophyllus var. trichophyllus | Ranunculaceae
|
| RAAQT | Ranunculus aquatilis L. var. typicus L. Benson | Ranunculus aquatilis | Ranunculaceae
|
| RAAQ | Ranunculus aquatilis L. | whitewater crowfoot | Ranunculaceae
|
| RAARS | Ranunculus arizonicus J.G. Lemmon ex Gray var. subaffinis Gray | Ranunculus inamoenus var. subaffinis | Ranunculaceae
|
| RAART | Ranunculus arizonicus J.G. Lemmon ex Gray var. typicus L. Benson | Ranunculus arizonicus | Ranunculaceae
|
| RAAR2 | Ranunculus arizonicus J.G. Lemmon ex Gray | Arizona buttercup | Ranunculaceae
|
| RAART2 | Ranunculus arvensis L. var. tuberculatus (DC.) Koch | Ranunculus arvensis | Ranunculaceae
|
| RAAR3 | Ranunculus arvensis L. | corn buttercup | Ranunculaceae
|
| RAAU | Ranunculus austrooreganus L. Benson | Southern Oregon buttercup | Ranunculaceae
|
| RABL | Ranunculus bloomeri S. Wats. | Ranunculus orthorhynchus var. bloomeri | Ranunculaceae
|
| RABOT | Ranunculus bonariensis Poir. var. trisepalus (Gillies ex Hook. & Arn.) Lourteig | Carter's buttercup | Ranunculaceae
|
| RABO | Ranunculus bonariensis Poir. | Carter's buttercup | Ranunculaceae
|
| RABOT2 | Ranunculus bongardii Greene var. tenellus (Nutt.) Greene | Ranunculus uncinatus var. uncinatus | Ranunculaceae
|
| RABO2 | Ranunculus bongardii Greene | Ranunculus uncinatus var. parviflorus | Ranunculaceae
|
| RABO3 | Ranunculus boreanus Jord. | Ranunculus acris var. acris | Ranunculaceae
|
| RABUD | Ranunculus bulbosus L. var. dissectus Barbey | Ranunculus bulbosus | Ranunculaceae
|
| RABUV | Ranunculus bulbosus L. var. valdepubens (Jord.) Briq. | Ranunculus bulbosus | Ranunculaceae
|
| RABU | Ranunculus bulbosus L. | St. Anthony's turnip | Ranunculaceae
|
| RACAA | Ranunculus californicus Benth. var. austromontanus L. Benson | Ranunculus californicus | Ranunculaceae
|
| RACAC | Ranunculus californicus Benth. var. cuneatus Greene | Ranunculus californicus | Ranunculaceae
|
| RACAG | Ranunculus californicus Benth. var. gratus Jepson | Ranunculus californicus | Ranunculaceae
|
| RACAL3 | Ranunculus californicus Benth. var. laetus Greene | Ranunculus canus | Ranunculaceae
|
| RACAR | Ranunculus californicus Benth. var. rugulosus (Greene) L. Benson | Ranunculus californicus | Ranunculaceae
|
| RACAT | Ranunculus californicus Benth. var. typicus L. Benson | Ranunculus californicus | Ranunculaceae
|
| RACA2 | Ranunculus californicus Benth. | California buttercup | Ranunculaceae
|
| RACAL | Ranunculus canus Benth. var. laetus (Greene) L. Benson | Ranunculus canus | Ranunculaceae
|
| RACAL2 | Ranunculus canus Benth. var. ludovicianus (Greene) L. Benson | Ranunculus canus | Ranunculaceae
|
| RACAT2 | Ranunculus canus Benth. var. typicus L. Benson | Ranunculus canus | Ranunculaceae
|
| RACA3 | Ranunculus canus Benth. | Sacramento Valley buttercup | Ranunculaceae
|
| RACAC2 | Ranunculus cardiophyllus Hook. var. coloradensis L. Benson | Ranunculus coloradensis | Ranunculaceae
|
| RACAS | Ranunculus cardiophyllus Hook. var. subsagittatus (Gray) L. Benson | Ranunculus cardiophyllus | Ranunculaceae
|
| RACAT3 | Ranunculus cardiophyllus Hook. var. typicus L. Benson | Ranunculus cardiophyllus | Ranunculaceae
|
| RACA4 | Ranunculus cardiophyllus Hook. | heartleaf buttercup | Ranunculaceae
|
| RACA6 | Ranunculus caricetorum Greene | Ranunculus hispidus var. caricetorum | Ranunculaceae
|
| RACAV | Ranunculus carolinianus DC. var. villicaulis Shinners | Ranunculus hispidus var. nitidus | Ranunculaceae
|
| RACA5 | Ranunculus carolinianus DC. | Ranunculus hispidus var. nitidus | Ranunculaceae
|
| RACH | Ranunculus chamissonis Schlecht. | Ranunculus glacialis var. chamissonis | Ranunculaceae
|
| RACIS | Ranunculus circinatus Sibthorp var. subrigidus (W. Drew) L. Benson | Ranunculus longirostris | Ranunculaceae
|
| RACI2 | Ranunculus circinatus auct. non Sibthorp | Ranunculus longirostris | Ranunculaceae
|
| RACO8 | Ranunculus codyanus Boivin | Ranunculus trichophyllus var. eradicatus | Ranunculaceae
|
| RACO10 | Ranunculus coloradensis (L. Benson) L. Benson | Colorado buttercup | Ranunculaceae
|
| RACO9 | Ranunculus confervoides (Fries) Fries | Ranunculus trichophyllus var. eradicatus | Ranunculaceae
|
| RACO2 | Ranunculus cooleyae Vasey & Rose | Kumlienia cooleyae | Ranunculaceae
|
| RACYS2 | Ranunculus cymbalaria Pursh ssp. saximontanus (Fern.) Thorne | Ranunculus cymbalaria | Ranunculaceae
|
| RACYA | Ranunculus cymbalaria Pursh var. alpinus Hook. | Ranunculus cymbalaria | Ranunculaceae
|
| RACYS | Ranunculus cymbalaria Pursh var. saximontanus Fern. | Ranunculus cymbalaria | Ranunculaceae
|
| RACYT | Ranunculus cymbalaria Pursh var. typicus L. Benson | Ranunculus cymbalaria | Ranunculaceae
|
| RACY | Ranunculus cymbalaria Pursh | alkali buttercup | Ranunculaceae
|
| RADE2 | Ranunculus delphiniifolius Torr. ex Eat. | Ranunculus flabellaris | Ranunculaceae
|
| RAEA2 | Ranunculus earlei Greene | Ranunculus uncinatus var. earlei | Ranunculaceae
|
| RAEA | Ranunculus eastwoodianus L. Benson | Eastwood's buttercup | Ranunculaceae
|
| RAEI | Ranunculus eisenii Kellogg | Ranunculus occidentalis var. occidentalis | Ranunculaceae
|
| RAEL2 | Ranunculus ellipticus Greene | Ranunculus glaberrimus var. ellipticus | Ranunculaceae
|
| RAESA | Ranunculus eschscholtzii Schlecht. var. adoneus (Gray) C.L. Hitchc. | Ranunculus adoneus var. adoneus | Ranunculaceae
|
| RAESA2 | Ranunculus eschscholtzii Schlecht. var. alpinus (S. Wats.) C.L. Hitchc. | Ranunculus adoneus var. alpinus | Ranunculaceae
|
| RAESE2 | Ranunculus eschscholtzii Schlecht. var. eschscholtzii | Eschscholtz's buttercup | Ranunculaceae
|
| RAESE | Ranunculus eschscholtzii Schlecht. var. eximius (Greene) L. Benson | Ranunculus eximius | Ranunculaceae
|
| RAESO | Ranunculus eschscholtzii Schlecht. var. oxynotus (Gray) Jepson | Eschscholtz's buttercup | Ranunculaceae
|
| RAESS | Ranunculus eschscholtzii Schlecht. var. suksdorfii (Gray) L. Benson | Ranunculus suksdorfii | Ranunculaceae
|
| RAEST | Ranunculus eschscholtzii Schlecht. var. trisectus (Eastw.) L. Benson | threesection buttercup | Ranunculaceae
|
| RAEST2 | Ranunculus eschscholtzii Schlecht. var. typicus L. Benson | Ranunculus eschscholtzii var. eschscholtzii | Ranunculaceae
|
| RAES | Ranunculus eschscholtzii Schlecht. | Eschscholtz's buttercup | Ranunculaceae
|
| RAEX | Ranunculus eximius Greene | tundra buttercup | Ranunculaceae
|
| RAFA3 | Ranunculus falcatus auct. non L. | Ceratocephala testiculata | Ranunculaceae
|