| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| RILY | Rinodina lycopodiicola de Lesd. | | Physciaceae
|
| RIMA4 | Rinodina marysvillensis H. Magn. | | Physciaceae
|
| RIME3 | Rinodina metaboliza Vainio | | Physciaceae
|
| RIMI5 | Rinodina microbola Tuck. ex Fink | Buellia microbola | Physciaceae
|
| RIMI2 | Rinodina milliaria Tuck. | Amandinea milliaria | Physciaceae
|
| RIMI3 | Rinodina milvina (Wahlenb.) Th. Fr. | | Physciaceae
|
| RIMI4 | Rinodina minutissima de Lesd. | | Physciaceae
|
| RIMN | Rinodina mniaraea (Ach.) Korber | | Physciaceae
|
| RIMN2 | Rinodina mniaroeiza (Nyl.) Arnold | | Physciaceae
|
| RIMU | Rinodina mucronatula H. Magn. | | Physciaceae
|
| RINI3 | Rinodina nigra Fink | Buellia nigra | Physciaceae
|
| RINI4 | Rinodina nimbosa (Fr.) Th. Fr. | Phaeorrhiza nimbosa | Physciaceae
|
| RINO2 | Rinodina novomexicana de Lesd. | Dimelaena oreina | Physciaceae
|
| RIOC3 | Rinodina occidentalis Lynge | Rinodina calcigena | Physciaceae
|
| RIOC4 | Rinodina ocellata (Hoffm.) Arnold | Rinodina lecanorina | Physciaceae
|
| RIOC2 | Rinodina ochrocea Willey ex Fink | | Physciaceae
|
| RIOL2 | Rinodina olivaceobrunnea C. W. Dodge & Baker | | Physciaceae
|
| RIOR3 | Rinodina orbata (Ach.) Vainio | Rinodina turfacea | Physciaceae
|
| RIOR2 | Rinodina oregana H. Magn. | | Physciaceae
|
| RIOR4 | Rinodina oreina (Ach.) A. Massal. | Dimelaena oreina | Physciaceae
|
| RIOX2 | Rinodina oxydata (A. Massal.) A. Massal. | | Physciaceae
|
| RIPA3 | Rinodina pachysperma H. Magn. | | Physciaceae
|
| RIPA4 | Rinodina papillata H. Magn. | | Physciaceae
|
| RIPA5 | Rinodina parasitica H. Mayrh. & Poelt | | Physciaceae
|
| RIPE3 | Rinodina penaridiana Mull. Arg. | Rinodina bischoffii | Physciaceae
|
| RIPE4 | Rinodina pennsylvanica H. Magn. | Amandinea dakotensis | Physciaceae
|
| RIPH | Rinodina phaeocarpa (Sommerf.) Vainio | Phaeorrhiza nimbosa | Physciaceae
|
| RIPL | Rinodina platyloba Willey | Mobergia calculiformis | Physciaceae
|
| RIPO | Rinodina polyspora Th. Fr. | | Physciaceae
|
| RIPO2 | Rinodina populicola H. Magn. | | Physciaceae
|
| RIPY | Rinodina pyrina (Ach.) Arnold | | Physciaceae
|
| RIPY2 | Rinodina pyriniformis H. Magn. | Amandinea dakotensis | Physciaceae
|
| RIRA2 | Rinodina radiata Tuck. | Dimelaena radiata | Physciaceae
|
| RIRO3 | Rinodina roscida (Sommerf.) Arnold | | Physciaceae
|
| RISA6 | Rinodina sabulosa Tuck. | Rinodina conradii | Physciaceae
|
| RISA7 | Rinodina salina Degel. | Rinodina gennarii | Physciaceae
|
| RISA5 | Rinodina santae-monicae H. Magn. | | Physciaceae
|
| RISE3 | Rinodina septentrionalis Malme | | Physciaceae
|
| RISH | Rinodina sheardii Tonsberg | | Physciaceae
|
| RISI2 | Rinodina silicicola de Lesd. | | Physciaceae
|
| RIST3 | Rinodina stictica Sheard & Tonsberg | | Physciaceae
|
| RISU4 | Rinodina subminuta H. Magn. | | Physciaceae
|
| RISU7 | Rinodina suboreina de Lesd. | Dimelaena oreina | Physciaceae
|
| RISU5 | Rinodina subplumbea H. Magn. | Amandinea dakotensis | Physciaceae
|
| RISU6 | Rinodina subsophodes (Nyl.) Zahlbr. | | Physciaceae
|
| RITE | Rinodina tephraspis (Tuck.) Herre | | Physciaceae
|
| RITH4 | Rinodina thomsonii Sheard | | Physciaceae
|
| RITH2 | Rinodina thujae (H. Magn.) Sheard | Rinodina excrescens | Physciaceae
|
| RITH3 | Rinodina thysanota Tuck. | Dimelaena thysanota | Physciaceae
|
| RITU2 | Rinodina turfacea (Wahlenb.) Korber | | Physciaceae
|
| RIVE2 | Rinodina vegasii de Lesd. | | Physciaceae
|
| RIVI7 | Rinodina violascens H. Magn. | Rinodina zwackhiana | Physciaceae
|
| RIWI | Rinodina willeyii Sheard & Giralt | | Physciaceae
|
| RIZW | Rinodina zwackhiana (Krempelh.) Korber | | Physciaceae
|
| RINOD | Rinodina (Ach.) Gray | rinodina | Physciaceae
|
| RICA4 | Rivea campanulata auct. non (L.) House | Stictocardia tiliifolia | Convolvulaceae
|
| RICO14 | Rivea corymbosa (L.) Hallier f. | Turbina corymbosa | Convolvulaceae
|
| RINE2 | Rivea nervosa (Burm. f.) Hallier f. | Argyreia nervosa | Convolvulaceae
|
| RIHU2 | Rivina humilis L. | rougeplant | Phytolaccaceae
|
| RIOC | Rivina octandra L. | Trichostigma octandrum | Phytolaccaceae
|
| RIVIN | Rivina L. | rivina | Phytolaccaceae
|
| RORO2 | Robertiella robertiana (L.) Hanks | Geranium robertianum | Geraniaceae
|
| ROAL2 | Robinia albicans Ashe | Robinia hispida var. rosea | Fabaceae
|
| ROAMB | Robinia �ambigua Poir. var. bella-rosea (Nichols.) Rehd. | Robinia ambigua | Fabaceae
|
| ROAM2 | Robinia �ambigua Poir. (pro sp.) | | Fabaceae
|
| ROBO2 | Robinia boyntonii Ashe | Robinia hispida var. rosea | Fabaceae
|
| ROBR2 | Robinia breviloba Rydb. | Robinia neomexicana var. rusbyi | Fabaceae
|
| ROCO7 | Robinia �coloradensis Dode | Robinia holdtii | Fabaceae
|
| RODU2 | Robinia �dubia Foucault | Robinia ambigua | Fabaceae
|
| ROEL2 | Robinia elliottii (Chapman) Ashe ex Small | Robinia hispida var. nana | Fabaceae
|
| ROFE3 | Robinia fertilis Ashe | Robinia hispida var. fertilis | Fabaceae
|
| ROGR | Robinia grandiflora Ashe | Robinia hispida var. fertilis | Fabaceae
|
| ROGR3 | Robinia grandiflora auct. non Ashe nec L. nec Schneid. | Robinia hispida var. hispida | Fabaceae
|
| ROHA | Robinia hartwegii Koehne | Robinia viscosa var. hartwegii | Fabaceae
|
| ROHIF8 | Robinia hispida L. var. fertilis (Ashe) Clausen | bristly locust | Fabaceae
|
| ROHIH | Robinia hispida L. var. hispida | bristly locust | Fabaceae
|
| ROHIK | Robinia hispida L. var. kelseyi (Cowell ex Hutchinson) Isely | Kelsey's locust | Fabaceae
|
| ROHIN | Robinia hispida L. var. nana (Ell.) DC. | bristly locust | Fabaceae
|
| ROHIR | Robinia hispida L. var. rosea Pursh | bristly locust | Fabaceae
|
| ROHI | Robinia hispida L. | bristly locust | Fabaceae
|
| ROHO | Robinia �holdtii Beissn. | | Fabaceae
|
| ROKE | Robinia kelseyi Cowell ex Hutchinson | Robinia hispida var. kelseyi | Fabaceae
|
| ROLE | Robinia leucantha Rehd. | Robinia hispida var. rosea | Fabaceae
|
| ROLO2 | Robinia �longiloba Ashe (pro sp.) | | Fabaceae
|
| ROLU | Robinia luxurians (Dieck) Schneid. ex Tarouca & Schneid. | Robinia neomexicana var. neomexicana | Fabaceae
|
| ROMA | Robinia �margarettiae Ashe (pro sp.) | | Fabaceae
|
| RONA | Robinia nana Ell. | Robinia hispida var. nana | Fabaceae
|
| RONEL | Robinia neomexicana Gray var. luxurians Dieck | Robinia neomexicana var. neomexicana | Fabaceae
|
| RONEN | Robinia neomexicana Gray var. neomexicana | New Mexico locust | Fabaceae
|
| RONER | Robinia neomexicana Gray var. rusbyi (Woot. & Standl.) Martin & Hutchins ex Peabody | Rusby's locust | Fabaceae
|
| RONES | Robinia neomexicana Gray var. subvelutina (Rydb.) Kearney & Peebles | Robinia neomexicana var. neomexicana | Fabaceae
|
| RONE | Robinia neomexicana Gray | New Mexico locust | Fabaceae
|
| ROPA5 | Robinia pallida Ashe | Robinia hispida var. hispida | Fabaceae
|
| ROPE | Robinia pedunculata Ashe | Robinia hispida var. fertilis | Fabaceae
|
| ROPSR | Robinia pseudoacacia L. var. rectissima (L.) Raber | Robinia pseudoacacia | Fabaceae
|
| ROPS | Robinia pseudoacacia L. | black locust | Fabaceae
|
| RORU4 | Robinia rusbyi Woot. & Standl. | Robinia neomexicana var. rusbyi | Fabaceae
|
| ROSL3 | Robinia �slavinii Rehd. | Robinia margarettiae | Fabaceae
|
| ROSP5 | Robinia speciosa Ashe | Robinia hispida var. hispida | Fabaceae
|
| ROVIH2 | Robinia viscosa Vent. var. hartwegii (Koehne) Ashe | Hartweg's locust | Fabaceae
|
| ROVIV | Robinia viscosa Vent. var. viscosa | clammy locust | Fabaceae
|