| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ROAM | Rorippa amphibia (L.) Bess. | great yellowcress | Brassicaceae
|
| ROAQ | Rorippa aquatica (Eat.) Palmer & Steyermark | Neobeckia aquatica | Brassicaceae
|
| ROAR4 | Rorippa armoracia (L.) A.S. Hitchc. | Armoracia rusticana | Brassicaceae
|
| ROAU | Rorippa austriaca (Crantz) Bess. | Austrian yellowcress | Brassicaceae
|
| ROBA | Rorippa barbareifolia (DC.) Kitagawa | hoary yellowcress | Brassicaceae
|
| ROCAC2 | Rorippa calycina (Engelm.) Rydb. var. columbiae (Suksdorf ex B.L. Robins.) Rollins | Rorippa columbiae | Brassicaceae
|
| ROCA | Rorippa calycina (Engelm.) Rydb. | persistent sepal yellowcress | Brassicaceae
|
| ROCA8 | Rorippa cantoniensis (Lour.) Ohwi | Chinese yellowcress | Brassicaceae
|
| ROCO2 | Rorippa coloradensis R. Stuckey | San Luis yellowcress | Brassicaceae
|
| ROCO3 | Rorippa columbiae (Suksdorf ex B.L. Robins.) Suksdorf ex T.J. Howell | Columbian yellowcress | Brassicaceae
|
| ROCUA | Rorippa curvipes Greene var. alpina (S. Wats.) R. Stuckey | Rorippa alpina | Brassicaceae
|
| ROCUC | Rorippa curvipes Greene var. curvipes | bluntleaf yellowcress | Brassicaceae
|
| ROCUI | Rorippa curvipes Greene var. integra (Rydb.) R. Stuckey | Rorippa curvipes var. truncata | Brassicaceae
|
| ROCUT | Rorippa curvipes Greene var. truncata (Jepson) Rollins | bluntleaf yellowcress | Brassicaceae
|
| ROCU2 | Rorippa curvipes Greene | bluntleaf yellowcress | Brassicaceae
|
| ROCUC2 | Rorippa curvisiliqua (Hook.) Bess. ex Britt. var. curvisiliqua | curvepod yellowcress | Brassicaceae
|
| ROCUL | Rorippa curvisiliqua (Hook.) Bess. ex Britt. var. lyrata (Nutt.) M.E. Peck ex C.L. Hitchc. | lyrateleaf yellowcress | Brassicaceae
|
| ROCUN | Rorippa curvisiliqua (Hook.) Bess. ex Britt. var. nuttallii (S. Wats.) R. Stuckey | Nuttall's yellowcress | Brassicaceae
|
| ROCUO | Rorippa curvisiliqua (Hook.) Bess. ex Britt. var. occidentalis (Greene) R. Stuckey | western yellowcress | Brassicaceae
|
| ROCUO2 | Rorippa curvisiliqua (Hook.) Bess. ex Britt. var. orientalis R. Stuckey | oriental yellowcress | Brassicaceae
|
| ROCUP | Rorippa curvisiliqua (Hook.) Bess. ex Britt. var. procumbens R. Stuckey | curvepod yellowcress | Brassicaceae
|
| ROCUS | Rorippa curvisiliqua (Hook.) Bess. ex Britt. var. spatulata R. Stuckey | curvepod yellowcress | Brassicaceae
|
| ROCU | Rorippa curvisiliqua (Hook.) Bess. ex Britt. | curvepod yellowcress | Brassicaceae
|
| ROFL | Rorippa floridana Al-Shehbaz & Rollins | Florida yellowcress | Brassicaceae
|
| ROGA2 | Rorippa gambelii (S. Wats.) Rollins & Al-Shehbaz | Gambel's yellowcress | Brassicaceae
|
| ROGL2 | Rorippa globosa (Turcz. ex Fisch. & C.A. Mey.) Hayek | globe yellowcress | Brassicaceae
|
| ROHE | Rorippa heterophylla (Blume) R.O. Williams | Rorippa indica var. indica | Brassicaceae
|
| ROHIB | Rorippa hispida (Desv.) Britt. var. barbareifolia (DC.) Hult�n | Rorippa barbareifolia | Brassicaceae
|
| ROHIG | Rorippa hispida (Desv.) Britt. var. glabrata Lunell | Rorippa palustris ssp. fernaldiana | Brassicaceae
|
| ROHI2 | Rorippa hispida (Desv.) Britt. | Rorippa palustris ssp. hispida | Brassicaceae
|
| ROINA | Rorippa indica (L.) Hiern. var. apetala Hochr. | variableleaf yellowcress | Brassicaceae
|
| ROINI | Rorippa indica (L.) Hiern. var. indica | variableleaf yellowcress | Brassicaceae
|
| ROIN | Rorippa indica (L.) Hiern. | variableleaf yellowcress | Brassicaceae
|
| ROISF3 | Rorippa islandica (Oeder) Borb�s ssp. fernaldiana (Butters & Abbe) Hult�n | Rorippa palustris ssp. fernaldiana | Brassicaceae
|
| ROISB | Rorippa islandica (Oeder) Borb�s var. barbareifolia (DC.) Welsh | Rorippa barbareifolia | Brassicaceae
|
| ROISF2 | Rorippa islandica (Oeder) Borb�s var. fernaldiana Butters & Abbe | Rorippa palustris ssp. fernaldiana | Brassicaceae
|
| ROISG | Rorippa islandica (Oeder) Borb�s var. glabra (O.E. Schulz) Welsh & Reveal | Rorippa palustris ssp. fernaldiana | Brassicaceae
|
| ROISG2 | Rorippa islandica (Oeder) Borb�s var. glabrata (Lunell) Butters & Abbe | Rorippa palustris ssp. fernaldiana | Brassicaceae
|
| ROISH2 | Rorippa islandica (Oeder) Borb�s var. hispida (Desv.) Butters & Abbe | Rorippa palustris ssp. hispida | Brassicaceae
|
| ROISM | Rorippa islandica (Oeder) Borb�s var. microcarpa (Regel) Fern. | Rorippa palustris ssp. palustris | Brassicaceae
|
| ROISO2 | Rorippa islandica (Oeder) Borb�s var. occidentalis (S. Wats.) Butters & Abbe | Rorippa palustris ssp. occidentalis | Brassicaceae
|
| ROIS2 | Rorippa islandica (Oeder) Borb�s | northern marsh yellowcress | Brassicaceae
|
| ROLY2 | Rorippa lyrata (Nutt.) Greene | Rorippa curvisiliqua var. lyrata | Brassicaceae
|
| ROMI3 | Rorippa microphylla (Boenn. ex Reichenb.) Hyl. ex A.& D. L�ve | onerow yellowcress | Brassicaceae
|
| ROMI4 | Rorippa microsperma (DC.) Bailey | Rorippa cantoniensis | Brassicaceae
|
| ROMI2 | Rorippa microtitis (B.L. Robins.) Rollins | Chihuahuan yellowcress | Brassicaceae
|
| ROMO3 | Rorippa montana (Wallich) Small | Rorippa indica var. indica | Brassicaceae
|
| RONAL | Rorippa nasturtium-aquaticum (L.) Hayek var. longisiliqua (Irmisch) Boivin | Rorippa microphylla | Brassicaceae
|
| RONAS | Rorippa nasturtium-aquaticum (L.) Hayek var. sterilis (Airy-Shaw) Boivin | Rorippa sterilis | Brassicaceae
|
| RONA2 | Rorippa nasturtium-aquaticum (L.) Hayek | watercress | Brassicaceae
|
| ROOBA | Rorippa obtusa (Nutt.) Britt. var. alpina (S. Wats.) Britt. | Rorippa alpina | Brassicaceae
|
| ROOBI | Rorippa obtusa (Nutt.) Britt. var. integra (Rydb.) Victorin | Rorippa curvipes var. truncata | Brassicaceae
|
| ROOB3 | Rorippa obtusa (Nutt.) Britt. | Rorippa teres | Brassicaceae
|
| ROPAF2 | Rorippa palustris (L.) Bess. ssp. fernaldiana (Butters & Abbe) Jonsell | Fernald's yellowcress | Brassicaceae
|
| ROPAG | Rorippa palustris (L.) Bess. ssp. glabra (Butters & Abbe) R. Stuckey | Rorippa palustris ssp. fernaldiana | Brassicaceae
|
| ROPAH | Rorippa palustris (L.) Bess. ssp. hispida (Desv.) Jonsell | hispid yellowcress | Brassicaceae
|
| ROPAO | Rorippa palustris (L.) Bess. ssp. occidentalis (S. Wats.) Abrams | western bog yellowcress | Brassicaceae
|
| ROPAP | Rorippa palustris (L.) Bess. ssp. palustris | bog yellowcress | Brassicaceae
|
| ROPAC3 | Rorippa palustris (L.) Bess. var. cernua (Nutt.) R. Stuckey | Rorippa palustris ssp. fernaldiana | Brassicaceae
|
| ROPAC4 | Rorippa palustris (L.) Bess. var. clavata (Rydb.) R. Stuckey | Rorippa palustris ssp. occidentalis | Brassicaceae
|
| ROPAD2 | Rorippa palustris (L.) Bess. var. dictyota (Greene) R. Stuckey | Rorippa palustris ssp. fernaldiana | Brassicaceae
|
| ROPAE2 | Rorippa palustris (L.) Bess. var. elongata R. Stuckey | Rorippa palustris ssp. hispida | Brassicaceae
|
| ROPAG3 | Rorippa palustris (L.) Bess. var. glabra (O.E. Schulz) R. Stuckey | Rorippa palustris ssp. fernaldiana | Brassicaceae
|
| ROPAG4 | Rorippa palustris (L.) Bess. var. glabrata (Lunell) R. Stuckey | Rorippa palustris ssp. fernaldiana | Brassicaceae
|
| ROPAH2 | Rorippa palustris (L.) Bess. var. hispida (Desv.) Rydb. | Rorippa palustris ssp. hispida | Brassicaceae
|
| ROPAO2 | Rorippa palustris (L.) Bess. var. occidentalis (S. Wats.) Rollins | Rorippa palustris ssp. occidentalis | Brassicaceae
|
| ROPAR | Rorippa palustris (L.) Bess. var. reptabunda (Fern.) R. Stuckey | Rorippa palustris ssp. palustris | Brassicaceae
|
| ROPAW | Rorippa palustris (L.) Bess. var. williamsii (Britt.) Hult�n | Rorippa palustris ssp. palustris | Brassicaceae
|
| ROPA2 | Rorippa palustris (L.) Bess. | bog yellowcress | Brassicaceae
|
| ROPO2 | Rorippa portoricensis (Spreng.) Stehl� | Puerto Rico yellowcress | Brassicaceae
|
| ROPR | Rorippa prostrata (Bergeret) Schinz & Thellung | prostrate yellowcress | Brassicaceae
|
| RORA2 | Rorippa ramosa Rollins | Durango yellowcress | Brassicaceae
|
| ROSA | Rorippa sarmentosa (G. Forst. ex DC.) J.F. Macbr. | longrunner | Brassicaceae
|
| ROSE | Rorippa sessiliflora (Nutt.) A.S. Hitchc. | stalkless yellowcress | Brassicaceae
|
| ROSI2 | Rorippa sinuata (Nutt.) A.S. Hitchc. | spreading yellowcress | Brassicaceae
|
| ROSP4 | Rorippa sphaerocarpa (Gray) Britt. | roundfruit yellowcress | Brassicaceae
|
| ROST3 | Rorippa �sterilis Airy-Shaw | | Brassicaceae
|
| ROSU2 | Rorippa subumbellata Rollins | Lake Tahoe yellowcress | Brassicaceae
|
| ROSY | Rorippa sylvestris (L.) Bess. | creeping yellowcress | Brassicaceae
|
| ROTE | Rorippa tenerrima Greene | Modoc yellowcress | Brassicaceae
|
| ROTE2 | Rorippa teres (Michx.) R. Stuckey | southern marsh yellowcress | Brassicaceae
|
| ROTR3 | Rorippa truncata (Jepson) R. Stuckey | Rorippa curvipes var. truncata | Brassicaceae
|
| ROWA3 | Rorippa walteri (Ell.) C. Mohr | Rorippa teres | Brassicaceae
|
| RORIP | Rorippa Scop. | yellowcress | Brassicaceae
|
| ROACA | Rosa acicularis Lindl. ssp. acicularis | prickly rose | Rosaceae
|
| ROACS | Rosa acicularis Lindl. ssp. sayi (Schwein.) W.H. Lewis | prickly rose | Rosaceae
|
| ROACB | Rosa acicularis Lindl. var. bourgeauiana (Cr�pin) Cr�pin | Rosa acicularis ssp. sayi | Rosaceae
|
| ROACS2 | Rosa acicularis Lindl. var. sayana Erlanson | Rosa acicularis ssp. sayi | Rosaceae
|
| ROAC | Rosa acicularis Lindl. | prickly rose | Rosaceae
|
| ROAD | Rosa adenosepala Woot. & Standl. | Rosa woodsii var. woodsii | Rosaceae
|
| ROAL3 | Rosa �alba L. (pro sp.) | white rose of York | Rosaceae
|
| ROAL5 | Rosa alcea Greene | Rosa arkansana var. suffulta | Rosaceae
|
| ROAL6 | Rosa aldersonii Greene | Rosa californica | Rosaceae
|
| ROAN3 | Rosa anatonensis St. John | Rosa nutkana var. hispida | Rosaceae
|
| ROARG | Rosa arizonica Rydb. var. granulifera (Rydb.) Kearney & Peebles | Rosa woodsii var. ultramontana | Rosaceae
|
| ROAR5 | Rosa arizonica Rydb. | Rosa woodsii var. ultramontana | Rosaceae
|
| ROARA | Rosa arkansana Porter var. arkansana | prairie rose | Rosaceae
|
| ROARS | Rosa arkansana Porter var. suffulta (Greene) Cockerell | prairie rose | Rosaceae
|
| ROAR3 | Rosa arkansana Porter | prairie rose | Rosaceae
|
| ROBI2 | Rosa �bifera (Poir.) Pers. | Rosa damascena | Rosaceae
|
| ROBLB | Rosa blanda Ait. var. blanda | smooth rose | Rosaceae
|