| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| RHST4 | Rhynchospora stipitata Chapman | Rhynchospora odorata | Cyperaceae
|
| RHSU | Rhynchospora sulcata Gale | Rhynchospora microcarpa | Cyperaceae
|
| RHTE3 | Rhynchospora tenerrima Nees ex Spreng. | soldier beaksedge | Cyperaceae
|
| RHTE4 | Rhynchospora tenuis Baldw. ex Gray | Rhynchospora wrightiana | Cyperaceae
|
| RHTE2 | Rhynchospora tenuis Link | quill beaksedge | Cyperaceae
|
| RHTH | Rhynchospora thornei Kral | Thorne's beaksedge | Cyperaceae
|
| RHTO4 | Rhynchospora torreyana Gray | Torrey's beaksedge | Cyperaceae
|
| RHTR2 | Rhynchospora tracyi Britt. | Tracy's beaksedge | Cyperaceae
|
| RHTR3 | Rhynchospora trichodes auct. non C.B. Clarke | Rhynchospora debilis | Cyperaceae
|
| RHUN | Rhynchospora uniflora Boeckl. | oneflower beaksedge | Cyperaceae
|
| RHWR | Rhynchospora wrightiana Boeckl. | Wright's beaksedge | Cyperaceae
|
| RHYNC3 | Rhynchospora Vahl | beaksedge | Cyperaceae
|
| RHCOA | Rhynchostegiella compacta (C. M�ll.) Loeske var. americana (Grout) Crum et al. | Conardia compacta | Amblystegiaceae
|
| RHCO15 | Rhynchostegiella compacta (C. M�ll.) Loeske | Conardia compacta | Amblystegiaceae
|
| RHGE3 | Rhynchostegiella georgiana Dix. & Grout in Grout | Leptodictyum riparium | Amblystegiaceae
|
| RHHI3 | Rhynchostegium hians (Hedw.) Delogne | Eurhynchium hians | Brachytheciaceae
|
| RHPS2 | Rhynchostegium pseudo-serrulatum (Kindb.) Kindb. | Brachythecium starkei | Brachytheciaceae
|
| RHPU8 | Rhynchostegium pulchellum (Hedw.) Robins. | Eurhynchium pulchellum var. pulchellum | Brachytheciaceae
|
| RHRE7 | Rhynchostegium revelstokense (Kindb.) Kindb. | Brachythecium acutum | Brachytheciaceae
|
| RHRI5 | Rhynchostegium riparioides (Hedw.) Card. in Tourr. | Platyhypnidium riparoides | Brachytheciaceae
|
| RHRU4 | Rhynchostegium rusciforme (Brid.) Schimp. in B.S.G. | Platyhypnidium riparoides | Brachytheciaceae
|
| RHSEE | Rhynchostegium serrulatum (Hedw.) Jaeg. ssp. eriense (Kindb.) Kindb. | Steerecleus serrulatus | Brachytheciaceae
|
| RHSEH | Rhynchostegium serrulatum (Hedw.) Jaeg. ssp. hispidifolium (Kindb.) Kindb. | Steerecleus serrulatus | Brachytheciaceae
|
| RHSE7 | Rhynchostegium serrulatum (Hedw.) Jaeg. | Steerecleus serrulatus | Brachytheciaceae
|
| RHST7 | Rhynchostegium strigosum (Web. & Mohr) De Not. | Eurhynchium pulchellum var. pulchellum | Brachytheciaceae
|
| RHSU10 | Rhynchostegium subintegrifolium (Kindb.) Kindb. | Brachythecium oedipodium | Brachytheciaceae
|
| RHYNC6 | Rhynchostegium B.S.G. | rhynchostegium | Brachytheciaceae
|
| RHPL5 | Rhysopterus plurijugus Coult. & Rose | Cymopterus corrugatus | Apiaceae
|
| RHCA20 | Rhytidiadelphus calvescens (Kindb.) Broth. | Rhytidiadelphus squarrosus | Hylocomiaceae
|
| RHJA5 | Rhytidiadelphus japonicus Reim. in Reim. & Sak. | Japanese goose neck moss | Hylocomiaceae
|
| RHLO70 | Rhytidiadelphus loreus (Hedw.) Warnst. | loreus goose neck moss | Hylocomiaceae
|
| RHSQC | Rhytidiadelphus squarrosus (Hedw.) Warnst. var. calvescens (Kindb.) Warnst. | Rhytidiadelphus squarrosus | Hylocomiaceae
|
| RHSQ70 | Rhytidiadelphus squarrosus (Hedw.) Warnst. | square goose neck moss | Hylocomiaceae
|
| RHSU11 | Rhytidiadelphus subpinnatus (Lindb.) T. Kop. | Rhytidiadelphus squarrosus | Hylocomiaceae
|
| RHTRB | Rhytidiadelphus triquetrus (Hedw.) Warnst. var. beringianus (Card. & Th�r.) Grout | Rhytidiadelphus triquetrus | Hylocomiaceae
|
| RHTR70 | Rhytidiadelphus triquetrus (Hedw.) Warnst. | rough goose neck moss | Hylocomiaceae
|
| RHYTI2 | Rhytidiadelphus (Lindb. ex Limpr.) Warnst. | goose neck moss | Hylocomiaceae
|
| RHRO7 | Rhytidiopsis robusta (Hook.) Broth. | robust rhytidiopsis moss | Hylocomiaceae
|
| RHYTI3 | Rhytidiopsis Broth. | rhytidiopsis moss | Hylocomiaceae
|
| RHRU70 | Rhytidium rugosum (Hedw.) Kindb. | rhytidium moss | Rhytidiaceae
|
| RHYTI4 | Rhytidium (Sull.) Kindb. | rhytidium moss | Rhytidiaceae
|
| RHLU3 | Rhytidomene lupinellus (Michx.) Rydb. | Orbexilum lupinellum | Fabaceae
|
| RHAU2 | Rhytidophyllum auriculatum Hook. | tibey-amarillo | Gesneriaceae
|
| RHYTI5 | Rhytidophyllum Mart. | tibey-amarillo | Gesneriaceae
|
| RHVE4 | Rhytiglossa verticillaris Nees | Justicia martinsoniana | Acanthaceae
|
| RHVI4 | Rhytiglossa viridiflora Nees | Yeatesia viridiflora | Acanthaceae
|
| RIAC | Ribes acerifolium T.J. Howell | mapleleaf currant | Grossulariaceae
|
| RIAL2 | Ribes alpinum L. | alpine currant | Grossulariaceae
|
| RIAMH | Ribes amarum McClatchie var. hoffmannii Munz | Ribes amarum | Grossulariaceae
|
| RIAM | Ribes amarum McClatchie | bitter gooseberry | Grossulariaceae
|
| RIAM3 | Ribes ambiguum S. Wats. | Ribes binominatum | Grossulariaceae
|
| RIAM2 | Ribes americanum P. Mill. | American black currant | Grossulariaceae
|
| RIAM4 | Ribes amictum Greene | Ribes roezlii var. amictum | Grossulariaceae
|
| RIAR | Ribes aridum Greene | Ribes roezlii var. roezlii | Grossulariaceae
|
| RIAS | Ribes ascendens Eastw. | Ribes nevadense var. nevadense | Grossulariaceae
|
| RIAUA | Ribes aureum Pursh var. aureum | golden currant | Grossulariaceae
|
| RIAUG | Ribes aureum Pursh var. gracillimum (Coville & Britt.) Jepson | golden currant | Grossulariaceae
|
| RIAUV | Ribes aureum Pursh var. villosum DC. | golden currant | Grossulariaceae
|
| RIAU | Ribes aureum Pursh | golden currant | Grossulariaceae
|
| RIBI | Ribes binominatum Heller | ground gooseberry | Grossulariaceae
|
| RIBR | Ribes bracteosum Dougl. ex Hook. | stink currant | Grossulariaceae
|
| RICAC | Ribes californicum Hook. & Arn. var. californicum | hillside gooseberry | Grossulariaceae
|
| RICAH | Ribes californicum Hook. & Arn. var. hesperium (McClatchie) Jepson | hillside gooseberry | Grossulariaceae
|
| RICA | Ribes californicum Hook. & Arn. | hillside gooseberry | Grossulariaceae
|
| RICA3 | Ribes camporum Blank. | Ribes oxyacanthoides ssp. setosum | Grossulariaceae
|
| RICA2 | Ribes canthariforme Wiggins | Moreno currant | Grossulariaceae
|
| RICEC2 | Ribes cereum Dougl. var. cereum | wax currant | Grossulariaceae
|
| RICEC | Ribes cereum Dougl. var. colubrinum C.L. Hitchc. | wax currant | Grossulariaceae
|
| RICEI | Ribes cereum Dougl. var. inebrians (Lindl.) C.L. Hitchc. | Ribes cereum var. pedicellare | Grossulariaceae
|
| RICEP | Ribes cereum Dougl. var. pedicellare Brewer & S. Wats. | whisky currant | Grossulariaceae
|
| RICE | Ribes cereum Dougl. | wax currant | Grossulariaceae
|
| RICO | Ribes cognatum Greene | Ribes oxyacanthoides ssp. cognatum | Grossulariaceae
|
| RICO2 | Ribes coloradense Coville | Ribes laxiflorum | Grossulariaceae
|
| RICO5 | Ribes congdonii Heller | Ribes quercetorum | Grossulariaceae
|
| RICRC | Ribes cruentum Greene var. cruentum | shinyleaf currant | Grossulariaceae
|
| RICRO | Ribes cruentum Greene var. oregonense Berger | Oregon currant | Grossulariaceae
|
| RICR | Ribes cruentum Greene | shinyleaf currant | Grossulariaceae
|
| RICU | Ribes curvatum Small | granite gooseberry | Grossulariaceae
|
| RICYA | Ribes cynosbati L. var. atrox Fern. | Ribes cynosbati | Grossulariaceae
|
| RICYG | Ribes cynosbati L. var. glabratum Fern. | Ribes cynosbati | Grossulariaceae
|
| RICYI | Ribes cynosbati L. var. inerme (Rehd.) Bailey | Ribes cynosbati | Grossulariaceae
|
| RICY | Ribes cynosbati L. | eastern prickly gooseberry | Grossulariaceae
|
| RIDE | Ribes deductum Greene | Ribes sanguineum var. deductum | Grossulariaceae
|
| RIDIP3 | Ribes divaricatum Dougl. ssp. parishii (Heller) E. Murr. | Ribes divaricatum var. parishii | Grossulariaceae
|
| RIDID | Ribes divaricatum Dougl. var. divaricatum | spreading gooseberry | Grossulariaceae
|
| RIDIG | Ribes divaricatum Dougl. var. glabriflorum Koehne | Ribes divaricatum var. divaricatum | Grossulariaceae
|
| RIDII | Ribes divaricatum Dougl. var. inerme (Rydb.) McMinn | Ribes inerme var. inerme | Grossulariaceae
|
| RIDII2 | Ribes divaricatum Dougl. var. irriguum (Dougl.) Gray | Ribes oxyacanthoides ssp. irriguum | Grossulariaceae
|
| RIDIK | Ribes divaricatum Dougl. var. klamathense (Coville) McMinn | Ribes inerme var. klamathense | Grossulariaceae
|
| RIDIM | Ribes divaricatum Dougl. var. montanum Jancz. | Ribes divaricatum var. pubiflorum | Grossulariaceae
|
| RIDIP | Ribes divaricatum Dougl. var. parishii (Heller) Jepson | Parish's gooseberry | Grossulariaceae
|
| RIDIP2 | Ribes divaricatum Dougl. var. pubiflorum Koehne | straggly gooseberry | Grossulariaceae
|
| RIDIR | Ribes divaricatum Dougl. var. rigidum M.E. Peck | Ribes divaricatum var. divaricatum | Grossulariaceae
|
| RIDI | Ribes divaricatum Dougl. | spreading gooseberry | Grossulariaceae
|
| RIEC | Ribes echinellum (Coville) Rehd. | Miccosukee gooseberry | Grossulariaceae
|
| RIER | Ribes erythrocarpum Coville & Leib. | Crater Lake currant | Grossulariaceae
|
| RIGL | Ribes glandulosum Grauer | skunk currant | Grossulariaceae
|
| RIGL4 | Ribes glaucescens Eastw. | Ribes nevadense var. glaucescens | Grossulariaceae
|
| RIGLM | Ribes glutinosum Benth. var. melanocarpum Greene | Ribes sanguineum var. melanocarpum | Grossulariaceae
|
| RIGL3 | Ribes glutinosum Benth. | Ribes sanguineum var. glutinosum | Grossulariaceae
|
| RIGO | Ribes gooddingii M.E. Peck | Ribes velutinum var. gooddingii | Grossulariaceae
|