| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| RAFAC | Ranunculus fascicularis Muhl. ex Bigelow var. cuneiformis (Small) L. Benson | Ranunculus macranthus | Ranunculaceae
|
| RAFAT | Ranunculus fascicularis Muhl. ex Bigelow var. typicus L. Benson | Ranunculus fascicularis | Ranunculaceae
|
| RAFA | Ranunculus fascicularis Muhl. ex Bigelow | early buttercup | Ranunculaceae
|
| RAFA8 | Ranunculus fasciculatus Sess� & Moci�o | Ranunculus petiolaris var. arsenei | Ranunculaceae
|
| RAFIB2 | Ranunculus ficaria L. ssp. bulbifera (Marsden-Jones) Lawalree | Ranunculus ficaria var. bulbifera | Ranunculaceae
|
| RAFIB | Ranunculus ficaria L. var. bulbifera Marsden-Jones | fig buttercup | Ranunculaceae
|
| RAFI | Ranunculus ficaria L. | fig buttercup | Ranunculaceae
|
| RAFIO | Ranunculus filiformis Michx. var. ovalis Bigelow | Ranunculus flammula var. flammula | Ranunculaceae
|
| RAFI2 | Ranunculus filiformis Michx. | Ranunculus flammula var. filiformis | Ranunculaceae
|
| RAFL | Ranunculus flabellaris Raf. | yellow water buttercup | Ranunculaceae
|
| RAFLC | Ranunculus flaccidus Pers. var. confervoides (Fries) Hegi | Ranunculus trichophyllus var. eradicatus | Ranunculaceae
|
| RAFL3 | Ranunculus flaccidus Pers. | Ranunculus trichophyllus var. trichophyllus | Ranunculaceae
|
| RAFLF | Ranunculus flammula L. var. filiformis (Michx.) Hook. | greater creeping spearwort | Ranunculaceae
|
| RAFLF2 | Ranunculus flammula L. var. flammula | greater creeping spearwort | Ranunculaceae
|
| RAFLG | Ranunculus flammula L. var. genuinus Buch. | Ranunculus flammula var. flammula | Ranunculaceae
|
| RAFLL | Ranunculus flammula L. var. laxicaulis Torr. & Gray | Ranunculus laxicaulis | Ranunculaceae
|
| RAFLO | Ranunculus flammula L. var. ovalis (Bigelow) L. Benson | Ranunculus flammula var. flammula | Ranunculaceae
|
| RAFLR | Ranunculus flammula L. var. reptans (L.) E. Mey. | Ranunculus flammula var. filiformis | Ranunculaceae
|
| RAFLS | Ranunculus flammula L. var. samolifolius (Greene) L. Benson | Ranunculus flammula var. flammula | Ranunculaceae
|
| RAFL2 | Ranunculus flammula L. | greater creeping spearwort | Ranunculaceae
|
| RAGEG | Ranunculus gelidus Kar. & Kir. ssp. grayi (Britt.) Hult�n | Ranunculus karelinii | Ranunculaceae
|
| RAGES | Ranunculus gelidus Kar. & Kir. var. shumaginensis Hult�n | Ranunculus karelinii | Ranunculaceae
|
| RAGE | Ranunculus gelidus Kar. & Kir. | Ranunculus karelinii | Ranunculaceae
|
| RAGLB | Ranunculus glaberrimus Hook. var. buddii Boivin | Ranunculus glaberrimus var. ellipticus | Ranunculaceae
|
| RAGLE | Ranunculus glaberrimus Hook. var. ellipticus (Greene) Greene | elliptical buttercup | Ranunculaceae
|
| RAGLG | Ranunculus glaberrimus Hook. var. glaberrimus | sagebrush buttercup | Ranunculaceae
|
| RAGLR | Ranunculus glaberrimus Hook. var. reconditus L. Benson | Ranunculus triternatus | Ranunculaceae
|
| RAGLT | Ranunculus glaberrimus Hook. var. typicus L. Benson | Ranunculus glaberrimus var. glaberrimus | Ranunculaceae
|
| RAGL | Ranunculus glaberrimus Hook. | sagebrush buttercup | Ranunculaceae
|
| RAGLC | Ranunculus glacialis L. ssp. chamissonis (Schlecht.) Hult�n | Ranunculus glacialis var. chamissonis | Ranunculaceae
|
| RAGLC2 | Ranunculus glacialis L. var. chamissonis (Schlecht.) L. Benson | glacier buttercup | Ranunculaceae
|
| RAGL2 | Ranunculus glacialis L. | glacier buttercup | Ranunculaceae
|
| RAGMP2 | Ranunculus gmelinii DC. ssp. purshii (Richards.) Hult�n | Ranunculus gmelinii | Ranunculaceae
|
| RAGMH | Ranunculus gmelinii DC. var. hookeri (D. Don) L. Benson | Ranunculus gmelinii | Ranunculaceae
|
| RAGML | Ranunculus gmelinii DC. var. limosus (Nutt.) Hara | Ranunculus gmelinii | Ranunculaceae
|
| RAGMP3 | Ranunculus gmelinii DC. var. prolificus (Fern.) Hara | Ranunculus gmelinii | Ranunculaceae
|
| RAGMP | Ranunculus gmelinii DC. var. purshii (Richards.) Hara | Ranunculus gmelinii | Ranunculaceae
|
| RAGMT2 | Ranunculus gmelinii DC. var. terrestris (Ledeb.) L. Benson | Ranunculus gmelinii | Ranunculaceae
|
| RAGMT | Ranunculus gmelinii DC. var. typicus L. Benson | Ranunculus gmelinii | Ranunculaceae
|
| RAGM | Ranunculus gmelinii DC. | Gmelin's buttercup | Ranunculaceae
|
| RAGO | Ranunculus gormanii Greene | Gorman's buttercup | Ranunculaceae
|
| RAGRA | Ranunculus grandis Honda var. austrokurilensis (Tatew.) Hara | Ranunculus acris var. frigidus | Ranunculaceae
|
| RAGR | Ranunculus grandis Honda | Ranunculus acris var. frigidus | Ranunculaceae
|
| RAGR3 | Ranunculus grayi Britt. | Ranunculus karelinii | Ranunculaceae
|
| RAHA3 | Ranunculus hartwegii Greene | Ranunculus alismifolius var. alismifolius | Ranunculaceae
|
| RAHAP | Ranunculus harveyi (Gray) Britt. var. pilosus Benke | Ranunculus harveyi | Ranunculaceae
|
| RAHAT | Ranunculus harveyi (Gray) Britt. var. typicus L. Benson | Ranunculus harveyi | Ranunculaceae
|
| RAHA | Ranunculus harveyi (Gray) Britt. | Harvey's buttercup | Ranunculaceae
|
| RAHA2 | Ranunculus hawaiensis Gray | Hawai'ian buttercup | Ranunculaceae
|
| RAHE | Ranunculus hebecarpus Hook. & Arn. | delicate buttercup | Ranunculaceae
|
| RAHE2 | Ranunculus hederaceus L. | ivy buttercup | Ranunculaceae
|
| RAHIC | Ranunculus hispidus Michx. var. caricetorum (Greene) T. Duncan | bristly buttercup | Ranunculaceae
|
| RAHIE | Ranunculus hispidus Michx. var. eurylobus L. Benson | Ranunculus hispidus var. hispidus | Ranunculaceae
|
| RAHIF | Ranunculus hispidus Michx. var. falsus Fern. | Ranunculus hispidus var. hispidus | Ranunculaceae
|
| RAHIG | Ranunculus hispidus Michx. var. greenmanii L. Benson | Ranunculus hispidus var. hispidus | Ranunculaceae
|
| RAHIH | Ranunculus hispidus Michx. var. hispidus | bristly buttercup | Ranunculaceae
|
| RAHIM | Ranunculus hispidus Michx. var. marilandicus (Poir.) L. Benson | Ranunculus hispidus var. hispidus | Ranunculaceae
|
| RAHIN | Ranunculus hispidus Michx. var. nitidus (Chapman) T. Duncan | bristly buttercup | Ranunculaceae
|
| RAHIT | Ranunculus hispidus Michx. var. typicus L. Benson | Ranunculus hispidus var. hispidus | Ranunculaceae
|
| RAHI | Ranunculus hispidus Michx. | bristly buttercup | Ranunculaceae
|
| RAHO | Ranunculus howellii Greene | Ranunculus occidentalis var. occidentalis | Ranunculaceae
|
| RAHYH | Ranunculus hydrocharoides Gray var. hydrocharoides | frogbit buttercup | Ranunculaceae
|
| RAHYS | Ranunculus hydrocharoides Gray var. stolonifer (Hemsl.) L. Benson | frogbit buttercup | Ranunculaceae
|
| RAHYT2 | Ranunculus hydrocharoides Gray var. typicus L. Benson | Ranunculus hydrocharoides var. hydrocharoides | Ranunculaceae
|
| RAHY | Ranunculus hydrocharoides Gray | frogbit buttercup | Ranunculaceae
|
| RAHYA | Ranunculus hyperboreus Rottb. ssp. arnellii Scheutz | Ranunculus hyperboreus | Ranunculaceae
|
| RAHYI | Ranunculus hyperboreus Rottb. ssp. intertextus (Greene) Kapoor & A.& D. L�ve | Ranunculus hyperboreus | Ranunculaceae
|
| RAHYI2 | Ranunculus hyperboreus Rottb. var. intertextus (Greene) Boivin | Ranunculus hyperboreus | Ranunculaceae
|
| RAHYT | Ranunculus hyperboreus Rottb. var. tuquetilianus Poulin p.p. | Ranunculus gmelinii | Ranunculaceae
|
| RAHYT | Ranunculus hyperboreus Rottb. var. tuquetilianus Poulin p.p. | Ranunculus hyperboreus | Ranunculaceae
|
| RAHY2 | Ranunculus hyperboreus Rottb. | high northern buttercup | Ranunculaceae
|
| RAHY3 | Ranunculus hystriculus Gray | Kumlienia hystricula | Ranunculaceae
|
| RAINS2 | Ranunculus inamoenus Greene ssp. subaffinis (Gray) Taylor & MacBryde | Ranunculus inamoenus var. subaffinis | Ranunculaceae
|
| RAINA | Ranunculus inamoenus Greene var. alpeophilus (A. Nels.) L. Benson | graceful buttercup | Ranunculaceae
|
| RAINI2 | Ranunculus inamoenus Greene var. inamoenus | graceful buttercup | Ranunculaceae
|
| RAINS | Ranunculus inamoenus Greene var. subaffinis (Gray) L. Benson | graceful buttercup | Ranunculaceae
|
| RAINT | Ranunculus inamoenus Greene var. typicus L. Benson | Ranunculus inamoenus var. inamoenus | Ranunculaceae
|
| RAIN | Ranunculus inamoenus Greene | graceful buttercup | Ranunculaceae
|
| RAIN2 | Ranunculus intertextus Greene | Ranunculus hyperboreus | Ranunculaceae
|
| RAJO | Ranunculus jovis A. Nels. | Utah buttercup | Ranunculaceae
|
| RAJU | Ranunculus juniperinus M.E. Jones | Ranunculus andersonii var. tenellus | Ranunculaceae
|
| RAKA | Ranunculus kamchaticus DC. | Kamchatka buttercup | Ranunculaceae
|
| RAKA3 | Ranunculus karelinii Czern. | ice cold buttercup | Ranunculaceae
|
| RALA | Ranunculus lapponicus L. | Lapland buttercup | Ranunculaceae
|
| RALAM | Ranunculus laxicaulis (Torr. & Gray) Darby var. mississippiensis (Small) L. Benson | Ranunculus laxicaulis | Ranunculaceae
|
| RALA2 | Ranunculus laxicaulis (Torr. & Gray) Darby | Mississippi buttercup | Ranunculaceae
|
| RALE | Ranunculus lemmonii Gray | Ranunculus alismifolius var. alismifolius | Ranunculaceae
|
| RALI2 | Ranunculus limosus Nutt. | Ranunculus gmelinii | Ranunculaceae
|
| RALI3 | Ranunculus lindheimeri Engelm. | Ranunculus pusillus var. pusillus | Ranunculaceae
|
| RALO | Ranunculus lobbii (Hiern.) Gray | Lobb's buttercup | Ranunculaceae
|
| RALO2 | Ranunculus longirostris Godr. | longbeak buttercup | Ranunculaceae
|
| RALU | Ranunculus ludovicianus Greene | Ranunculus canus | Ranunculaceae
|
| RAMAB | Ranunculus macauleyi Gray var. brandegeei L. Benson | Brandegee's buttercup | Ranunculaceae
|
| RAMAM | Ranunculus macauleyi Gray var. macauleyi | Rocky Mountain buttercup | Ranunculaceae
|
| RAMAT2 | Ranunculus macauleyi Gray var. typicus L. Benson | Ranunculus macauleyi var. macauleyi | Ranunculaceae
|
| RAMA | Ranunculus macauleyi Gray | Rocky Mountain buttercup | Ranunculaceae
|
| RAMAO | Ranunculus macounii Britt. var. oreganus (Gray) Davis | Ranunculus macounii | Ranunculaceae
|
| RAMA2 | Ranunculus macounii Britt. | Macoun's buttercup | Ranunculaceae
|
| RAMAA | Ranunculus macranthus Scheele var. arsenei L. Benson | Ranunculus petiolaris var. arsenei | Ranunculaceae
|
| RAMAT3 | Ranunculus macranthus Scheele var. typicus L. Benson | Ranunculus macranthus | Ranunculaceae
|
| RAMA3 | Ranunculus macranthus Scheele | large buttercup | Ranunculaceae
|