| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| RULAB | Rudbeckia laciniata L. var. bipinnata Perdue | cutleaf coneflower | Asteraceae
|
| RULAD | Rudbeckia laciniata L. var. digitata (P. Mill.) Fiori | cutleaf coneflower | Asteraceae
|
| RULAH | Rudbeckia laciniata L. var. hortensis Bailey | Rudbeckia laciniata var. laciniata | Asteraceae
|
| RULAH2 | Rudbeckia laciniata L. var. humilis Gray | greenhead coneflower | Asteraceae
|
| RULAL | Rudbeckia laciniata L. var. laciniata | cutleaf coneflower | Asteraceae
|
| RULA3 | Rudbeckia laciniata L. | cutleaf coneflower | Asteraceae
|
| RULO8 | Rudbeckia longipes T.V. Moore | Rudbeckia hirta var. pulcherrima | Asteraceae
|
| RUMA3 | Rudbeckia maxima Nutt. | great coneflower | Asteraceae
|
| RUMI | Rudbeckia missouriensis Engelm. ex C.L. Boynt. & Beadle | Missouri orange coneflower | Asteraceae
|
| RUMO6 | Rudbeckia mohrii Gray | Mohr's coneflower | Asteraceae
|
| RUMO | Rudbeckia mollis Ell. | softhair coneflower | Asteraceae
|
| RUMO9 | Rudbeckia montana Gray | montane coneflower | Asteraceae
|
| RUMO7 | Rudbeckia monticola Small | Rudbeckia hirta var. hirta | Asteraceae
|
| RUNIT | Rudbeckia nitida Nutt. var. texana Perdue | Rudbeckia texana | Asteraceae
|
| RUNI3 | Rudbeckia nitida Nutt. | shiny coneflower | Asteraceae
|
| RUOCA | Rudbeckia occidentalis Nutt. var. alpicola (Piper) Cronq. | Rudbeckia alpicola | Asteraceae
|
| RUOCM | Rudbeckia occidentalis Nutt. var. montana (Gray) Perdue | Rudbeckia montana | Asteraceae
|
| RUOC2 | Rudbeckia occidentalis Nutt. | western coneflower | Asteraceae
|
| RUPA23 | Rudbeckia pallida Nutt. | Echinacea pallida | Asteraceae
|
| RUPA22 | Rudbeckia palustris Eggert ex C.L. Boynt. & Beadle | Rudbeckia fulgida var. palustris | Asteraceae
|
| RUPI3 | Rudbeckia pinnata Vent. | Ratibida pinnata | Asteraceae
|
| RUPI4 | Rudbeckia pinnatiloba (Torr. & Gray) Beadle | Rudbeckia triloba var. pinnatiloba | Asteraceae
|
| RUPU9 | Rudbeckia purpurea L. | Echinacea purpurea | Asteraceae
|
| RURU6 | Rudbeckia rupestris Chickering | Rudbeckia triloba var. rupestris | Asteraceae
|
| RUSC4 | Rudbeckia scabrifolia L.E. Brown | roughleaf coneflower | Asteraceae
|
| RUSE16 | Rudbeckia sericea T.V. Moore | Rudbeckia hirta var. pulcherrima | Asteraceae
|
| RUSEC | Rudbeckia serotina Nutt. var. corymbifera (Fern.) Fern. & Schub. | Rudbeckia hirta var. pulcherrima | Asteraceae
|
| RUSEL | Rudbeckia serotina Nutt. var. lanceolata (Bisch.) Fern. & Schub. | Rudbeckia hirta var. pulcherrima | Asteraceae
|
| RUSES | Rudbeckia serotina Nutt. var. sericea (T.V. Moore) Fern. & Schub. | Rudbeckia hirta var. pulcherrima | Asteraceae
|
| RUSE5 | Rudbeckia serotina Nutt. | Rudbeckia hirta var. pulcherrima | Asteraceae
|
| RUSP7 | Rudbeckia spathulata Michx. | Rudbeckia fulgida var. spathulata | Asteraceae
|
| RUSPS2 | Rudbeckia speciosa Wenderoth var. sullivantii (C.L. Boynt. & Beadle) B.L. Robins. | Rudbeckia fulgida var. sullivantii | Asteraceae
|
| RUSP8 | Rudbeckia speciosa Wenderoth | Rudbeckia fulgida var. speciosa | Asteraceae
|
| RUSU | Rudbeckia subtomentosa Pursh | sweet coneflower | Asteraceae
|
| RUSU7 | Rudbeckia sullivantii C.L. Boynt. & Beadle | Rudbeckia fulgida var. sullivantii | Asteraceae
|
| RUTA4 | Rudbeckia tagetes James | Ratibida tagetes | Asteraceae
|
| RUTE3 | Rudbeckia tenax C.L. Boynt. & Beadle | Rudbeckia fulgida var. fulgida | Asteraceae
|
| RUTE4 | Rudbeckia texana (Perdue) P. Cox & Urbatsch | Texas coneflower | Asteraceae
|
| RUTRB | Rudbeckia triloba L. var. beadlei (Small) Fern. p.p. | Rudbeckia triloba var. rupestris | Asteraceae
|
| RUTRP | Rudbeckia triloba L. var. pinnatiloba Torr. & Gray | browneyed Susan | Asteraceae
|
| RUTRR | Rudbeckia triloba L. var. rupestris (Chickering) Gray | browneyed Susan | Asteraceae
|
| RUTRT | Rudbeckia triloba L. var. triloba | browneyed Susan | Asteraceae
|
| RUTR2 | Rudbeckia triloba L. | browneyed Susan | Asteraceae
|
| RUTR10 | Rudbeckia truncata Small | Rudbeckia fulgida var. fulgida | Asteraceae
|
| RUUM | Rudbeckia umbrosa C.L. Boynt. & Beadle | Rudbeckia fulgida var. umbrosa | Asteraceae
|
| RUDBE | Rudbeckia L. | coneflower | Asteraceae
|
| RUAL15 | Ruellia alopecuroidea Vahl | Teliostachya alopecuroidea | Acanthaceae
|
| RUAN6 | Ruellia antipoda L. | Lindernia antipoda | Scrophulariaceae
|
| RUBL3 | Ruellia blechum L. | Blechum pyramidatum | Acanthaceae
|
| RUBR10 | Ruellia brasiliensis Spreng. | Hygrophila costata | Acanthaceae
|
| RUBR12 | Ruellia brevifolia (Pohl) Ezcurra | tropical wild petunia | Acanthaceae
|
| RUBR | Ruellia brittoniana Leonard | Britton's wild petunia | Acanthaceae
|
| RUCAC4 | Ruellia caroliniensis (J.F. Gmel.) Steud. ssp. caroliniensis var. caroliniensis | Carolina wild petunia | Acanthaceae
|
| RUCAS6 | Ruellia caroliniensis (J.F. Gmel.) Steud. ssp. caroliniensis var. serrulata Tharp & Barkl. | Carolina wild petunia | Acanthaceae
|
| RUCAS7 | Ruellia caroliniensis (J.F. Gmel.) Steud. ssp. caroliniensis var. succulenta (Small) R.W. Long | Carolina wild petunia | Acanthaceae
|
| RUCAC2 | Ruellia caroliniensis (J.F. Gmel.) Steud. ssp. caroliniensis | Carolina wild petunia | Acanthaceae
|
| RUCAC5 | Ruellia caroliniensis (J.F. Gmel.) Steud. ssp. ciliosa (Pursh) R.W. Long var. cinerascens (Fern.) Kartesz & Gandhi | Carolina wild petunia | Acanthaceae
|
| RUCAH | Ruellia caroliniensis (J.F. Gmel.) Steud. ssp. ciliosa (Pursh) R.W. Long var. heteromorpha (Fern.) R.W. Long | Carolina wild petunia | Acanthaceae
|
| RUCAC | Ruellia caroliniensis (J.F. Gmel.) Steud. ssp. ciliosa (Pursh) R.W. Long | Carolina wild petunia | Acanthaceae
|
| RUCAC6 | Ruellia caroliniensis (J.F. Gmel.) Steud. var. cheloniformis Fern. | Ruellia caroliniensis ssp. caroliniensis var. caroliniensis | Acanthaceae
|
| RUCAD | Ruellia caroliniensis (J.F. Gmel.) Steud. var. dentata (Nees) Fern. | Ruellia caroliniensis ssp. caroliniensis var. caroliniensis | Acanthaceae
|
| RUCAM | Ruellia caroliniensis (J.F. Gmel.) Steud. var. membranacea Fern. | Ruellia caroliniensis ssp. caroliniensis var. caroliniensis | Acanthaceae
|
| RUCAN | Ruellia caroliniensis (J.F. Gmel.) Steud. var. nanella Fern. | Ruellia caroliniensis ssp. caroliniensis var. caroliniensis | Acanthaceae
|
| RUCAP | Ruellia caroliniensis (J.F. Gmel.) Steud. var. parviflora (Nees) Blake | Ruellia caroliniensis ssp. caroliniensis var. caroliniensis | Acanthaceae
|
| RUCAS4 | Ruellia caroliniensis (J.F. Gmel.) Steud. var. salicina Fern. | Ruellia caroliniensis ssp. caroliniensis var. caroliniensis | Acanthaceae
|
| RUCAS5 | Ruellia caroliniensis (J.F. Gmel.) Steud. var. semicalva Fern. | Ruellia caroliniensis ssp. caroliniensis var. caroliniensis | Acanthaceae
|
| RUCA4 | Ruellia caroliniensis (J.F. Gmel.) Steud. | Carolina wild petunia | Acanthaceae
|
| RUCH6 | Ruellia chartacea (T. Anders.) Wasshausen | | Acanthaceae
|
| RUCI3 | Ruellia ciliatiflora Hook. | hairyflower wild petunia | Acanthaceae
|
| RUCIC | Ruellia ciliosa Pursh var. cinerascens Fern. | Ruellia caroliniensis ssp. ciliosa var. cinerascens | Acanthaceae
|
| RUCIL | Ruellia ciliosa Pursh var. longiflora Gray | Ruellia humilis | Acanthaceae
|
| RUCI4 | Ruellia ciliosa Pursh | Ruellia caroliniensis ssp. ciliosa var. cinerascens | Acanthaceae
|
| RUCO5 | Ruellia coccinea (L.) Vahl | yerba maravilla | Acanthaceae
|
| RUCO | Ruellia corzoi Tharp & Barkl. | Corzo's wild petunia | Acanthaceae
|
| RUDA | Ruellia davisiorum Tharp & Barkl. | Rio Grande wild petunia | Acanthaceae
|
| RUDE13 | Ruellia devosiana hort. Makoy ex E. Murr. | Brazilian wild petunia | Acanthaceae
|
| RUDI13 | Ruellia dipteracanthus Hemsl. | | Acanthaceae
|
| RUDR | Ruellia drummondiana (Nees) Gray | Drummond's wild petunia | Acanthaceae
|
| RUDRD | Ruellia drushelii Tharp & Barkl. var. drushelii | Drushel's wild petunia | Acanthaceae
|
| RUDRM | Ruellia drushelii Tharp & Barkl. var. macrocarpa Tharp & Barkl. | Drushel's wild petunia | Acanthaceae
|
| RUDR2 | Ruellia drushelii Tharp & Barkl. | Drushel's wild petunia | Acanthaceae
|
| RUDU3 | Ruellia dulcis Cav. | Stenandrium dulce | Acanthaceae
|
| RUGR8 | Ruellia graecizans Backer | Ruellia brevifolia | Acanthaceae
|
| RUHE4 | Ruellia heteromorpha Fern. | Ruellia caroliniensis ssp. ciliosa var. heteromorpha | Acanthaceae
|
| RUHUC | Ruellia humilis Nutt. var. calvescens Fern. | Ruellia humilis | Acanthaceae
|
| RUHUD | Ruellia humilis Nutt. var. depauperata Tharp & Barkl. | Ruellia humilis | Acanthaceae
|
| RUHUE | Ruellia humilis Nutt. var. expansa Fern. | Ruellia humilis | Acanthaceae
|
| RUHUF | Ruellia humilis Nutt. var. frondosa Fern. | Ruellia humilis | Acanthaceae
|
| RUHUL | Ruellia humilis Nutt. var. longiflora (Gray) Fern. | Ruellia humilis | Acanthaceae
|
| RUHU | Ruellia humilis Nutt. | fringeleaf wild petunia | Acanthaceae
|
| RUHU6 | Ruellia humilis sensu Small, non Nutt. | Ruellia caroliniensis ssp. ciliosa var. cinerascens | Acanthaceae
|
| RUHU5 | Ruellia humistrata Michx. | Dyschoriste humistrata | Acanthaceae
|
| RUHY3 | Ruellia hybrida Pursh | Ruellia caroliniensis ssp. caroliniensis var. caroliniensis | Acanthaceae
|
| RUHY4 | Ruellia hybrida sensu Small, non Pursh | Ruellia caroliniensis ssp. ciliosa var. heteromorpha | Acanthaceae
|
| RULA14 | Ruellia lacustris Schlecht. & Cham. | Hygrophila lacustris | Acanthaceae
|
| RULO7 | Ruellia lorentziana Griseb. | Ruellia ciliatiflora | Acanthaceae
|
| RUMA9 | Ruellia malacosperma Greenm. | softseed wild petunia | Acanthaceae
|
| RUMA18 | Ruellia malacosperma sensu Small, non Greenm. | Ruellia brittoniana | Acanthaceae
|
| RUMEM2 | Ruellia metziae Tharp var. marshii Tharp & Barkl. | Ruellia metziae | Acanthaceae
|
| RUME | Ruellia metziae Tharp | Metz's wild petunia | Acanthaceae
|
| RUMU6 | Ruellia muelleri Tharp & Barkl. | Ruellia metziae | Acanthaceae
|