Ohio florası listesi
R

Ranunculus abortivus (N)
Ranunculus acris var. acris (N)
Ranunculus acris var. acris (I)
Ranunculus allegheniensis (N)
Ranunculus ambigens (N)
Ranunculus arvensis (I)
Ranunculus bulbosus (I)
Ranunculus fascicularis (N)
Ranunculus ficaria var. bulbifera (I)
Ranunculus flabellaris (N)
Ranunculus hispidus var. caricetorum (N)
Ranunculus hispidus var. hispidus (N)
Ranunculus hispidus var. nitidus (N)
Ranunculus longirostris (N)
Ranunculus micranthus (N)
Ranunculus parviflorus (I)
Ranunculus pensylvanicus (N)
Ranunculus pusillus var. pusillus (N)
Ranunculus recurvatus var. recurvatus (N)
Ranunculus repens (I)
Ranunculus sceleratus var. sceleratus (N)
Raphanus raphanistrum (I)
Raphanus sativus (I)
Ratibida columnifera (N)
Ratibida pinnata (N)
Reseda alba (I)
Reseda lutea (I)
Reseda luteola (I)
Reynoutria japonica (syn. Polygonum cuspidatum) (I)
Rhamnus alnifolia (N)
Rhamnus cathartica (I)
Rhamnus davurica ssp. davurica (I)
Rhamnus lanceolata ssp. glabrata (N)
Rhamnus lanceolata ssp. lanceolata (N)
Rhamnus utilis (I)
Rheum rhabarbarum (I)
Rhexia virginica (N)
Rhododendron calendulaceum (N)
Rhododendron maximum (N)
Rhododendron periclymenoides (N)
Rhododendron prinophyllum (N)
Rhodotypos scandens (I)
Rhus aromatica var. arenaria (N)
Rhus aromatica var. aromatica (N)
Rhus copallinum var. latifolia (N)
Rhus glabra (N)
Rhus pulvinata (N)
Rhus typhina (N)
Rhynchospora alba (N)
Rhynchospora capillacea (N)
Rhynchospora capitellata (N)
Rhynchospora recognita (N)
Ribes americanum (N)
Ribes aureum var. villosum (N)
Ribes cynosbati (N)
Ribes glandulosum (N)
Ribes hirtellum (N)
Ribes missouriense (N)
Ribes nigrum (I)
Ribes oxyacanthoides ssp. oxyacanthoides (N)
Ribes rotundifolium (N)
Ribes rubrum (I)
Ribes triste (N)
Ribes uva-crispa var. sativum (I)
Ricinus communis (I)
Robinia × ambigua (N)
Robinia hispida var. fertilis (N)
Robinia hispida var. hispida (N)
Robinia pseudoacacia (N)
Robinia viscosa var. viscosa (N)
Rorippa palustris ssp. fernaldiana (N)
Rorippa palustris ssp. hispida (N)
Rorippa sessiliflora (N)
Rorippa sylvestris (I)
Rosa arkansana var. suffulta (N)
Rosa blanda var. blanda (N)
Rosa canina (I)
Rosa carolina var. carolina (N)
Rosa centifolia (I)
Rosa cinnamomea (I)
Rosa eglanteria (I)
Rosa gallica (I)
Rosa majalis (I)
Rosa micrantha (I)
Rosa multiflora (I)
Rosa nitida (N)
Rosa × palustriformis (N)
Rosa palustris (N)
Rosa pimpinellifolia (I)
Rosa × rudiuscula (N)
Rosa rugosa (I)
Rosa setigera var. setigera (N)
Rosa setigera var. tomentosa (N)
Rosa wichuraiana (I)
Rotala ramosior (N)
Rubus aboriginum (N)
Rubus allegheniensis var. allegheniensis (N)
Rubus allegheniensis var. gravesii (N)
Rubus alumnus (N)
Rubus argutus (N)
Rubus armeniacus (I)
Rubus baileyanus (N)
Rubus bellobatus (N)
Rubus canadensis (N)
Rubus deamii (N)
Rubus depavitus (N)
Rubus fecundus (N)
Rubus flagellaris (N)
Rubus frondosus (N)
Rubus hispidus (N)
Rubus idaeus ssp. strigosus (N)
Rubus idaeus ssp. idaeus (I)
Rubus invisus (N)
Rubus laciniatus (I)
Rubus laudatus (N)
Rubus meracus (N)
Rubus michiganensis (N)
Rubus multifer (N)
Rubus occidentalis (N)
Rubus odoratus var. odoratus (N)
Rubus pensilvanicus (N)
Rubus pergratus (N)
Rubus philadelphicus (N)
Rubus phoenicolasius (I)
Rubus plicatifolius (N)
Rubus prestonensis (N)
Rubus pubescens var. pubescens (N)
Rubus recurvans (N)
Rubus recurvicaulis (N)
Rubus roribaccus (N)
Rubus rosa (N)
Rubus setosus (N)
Rubus suus (N)
Rubus trivialis (N)
Rubus uvidus (N)
Rubus vagus (N)
Rudbeckia fulgida var. deamii (N)
Rudbeckia fulgida var. fulgida (N)
Rudbeckia fulgida var. speciosa (N)
Rudbeckia fulgida var. umbrosa (N)
Rudbeckia grandiflora var. grandiflora (N)
Rudbeckia hirta var. hirta (N)
Rudbeckia hirta var. pulcherrima (N)
Rudbeckia laciniata var. laciniata (N)
Rudbeckia triloba var. triloba (N)
Ruellia caroliniensis ssp. caroliniensis var. caroliniensis (N)
Ruellia caroliniensis ssp. caroliniensis (N)
Ruellia humilis (N)
Ruellia strepens (N)
Rumex acetosa (N)
Rumex acetosa ssp. acetosa (I)
Rumex acetosella (I)
Rumex × acutus (I)
Rumex × acutus (N)
Rumex altissimus (N)
Rumex conglomeratus (I)
Rumex crispus ssp. crispus (I)
Rumex maritimus (N)
Rumex obtusifolius (I)
Rumex orbiculatus var. borealis (N)
Rumex orbiculatus var. orbiculatus (N)
Rumex patientia (I)
Rumex salicifolius var. mexicanus (N)
Rumex verticillatus (N)
Ruppia cirrhosa (N)