| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| SMOVO | Smelowskia ovalis M.E. Jones var. ovalis | alpine false candytuft | Brassicaceae
|
| SMOV | Smelowskia ovalis M.E. Jones | alpine false candytuft | Brassicaceae
|
| SMPO | Smelowskia porsildii (Drury & Rollins) Yurtsev | Smelowskia calycina var. porsildii | Brassicaceae
|
| SMPY | Smelowskia pyriformis Drury & Rollins | pearshaped smelowskia | Brassicaceae
|
| SMELO | Smelowskia C.A. Mey. | candytuft | Brassicaceae
|
| SMAMG | Smilacina amplexicaulis Nutt. var. glabra J.F. Macbr. | Maianthemum racemosum ssp. amplexicaule | Liliaceae
|
| SMAMJ | Smilacina amplexicaulis Nutt. var. jenkinsii Boivin | Maianthemum racemosum ssp. amplexicaule | Liliaceae
|
| SMAMO | Smilacina amplexicaulis Nutt. var. ovata Boivin | Maianthemum racemosum ssp. amplexicaule | Liliaceae
|
| SMAM | Smilacina amplexicaulis Nutt. | Maianthemum racemosum ssp. amplexicaule | Liliaceae
|
| SMBOU | Smilacina borealis (Ait.) Raf. var. uniflora Menzies ex J.A. & J.H. Schultes | Clintonia uniflora | Liliaceae
|
| SMCI | Smilacina ciliata Desf. | Maianthemum racemosum ssp. racemosum | Liliaceae
|
| SMFL | Smilacina flexicaulis Wender | Maianthemum racemosum ssp. racemosum | Liliaceae
|
| SMLI | Smilacina liliacea (Greene) Wynd | Maianthemum stellatum | Liliaceae
|
| SMRAA | Smilacina racemosa (L.) Desf. var. amplexicaulis (Nutt.) S. Wats. | Maianthemum racemosum ssp. amplexicaule | Liliaceae
|
| SMRAB | Smilacina racemosa (L.) Desf. var. brachystyla G. Henderson | Maianthemum racemosum ssp. amplexicaule | Liliaceae
|
| SMRAC | Smilacina racemosa (L.) Desf. var. cylindrata Fern. | Maianthemum racemosum ssp. racemosum | Liliaceae
|
| SMRAG | Smilacina racemosa (L.) Desf. var. glabra (J.F. Macbr.) St. John | Maianthemum racemosum ssp. amplexicaule | Liliaceae
|
| SMRAJ | Smilacina racemosa (L.) Desf. var. jenkinsii (Boivin) Boivin | Maianthemum racemosum ssp. amplexicaule | Liliaceae
|
| SMRAL | Smilacina racemosa (L.) Desf. var. lanceolata Boivin | Maianthemum racemosum ssp. racemosum | Liliaceae
|
| SMRAT | Smilacina racemosa (L.) Desf. var. typica Fern. | Maianthemum racemosum ssp. racemosum | Liliaceae
|
| SMRA | Smilacina racemosa (L.) Desf. | Maianthemum racemosum ssp. racemosum | Liliaceae
|
| SMSE | Smilacina sessilifolia Nutt. ex Baker | Maianthemum stellatum | Liliaceae
|
| SMSTC | Smilacina stellata (L.) Desf. var. crassa Victorin | Maianthemum stellatum | Liliaceae
|
| SMSTM | Smilacina stellata (L.) Desf. var. mollis Farw. | Maianthemum stellatum | Liliaceae
|
| SMSTS | Smilacina stellata (L.) Desf. var. sessilifolia (Nutt. ex Baker) G. Henderson | Maianthemum stellatum | Liliaceae
|
| SMSTS2 | Smilacina stellata (L.) Desf. var. sylvatica Victorin & Rouss. | Maianthemum stellatum | Liliaceae
|
| SMST | Smilacina stellata (L.) Desf. | Maianthemum stellatum | Liliaceae
|
| SMTR | Smilacina trifolia (L.) Desf. | Maianthemum trifolium | Liliaceae
|
| SMAR | Smilax aristolochiifolia Miller | sarsaparilla | Smilacaceae
|
| SMAU | Smilax auriculata Walt. | earleaf greenbrier | Smilacaceae
|
| SMBI | Smilax biltmoreana (Small) J.B.S. Norton ex Pennell | Biltmore's carrionflower | Smilacaceae
|
| SMBOE | Smilax bona-nox L. var. exauriculata Fern. | Smilax bona-nox | Smilacaceae
|
| SMBOH | Smilax bona-nox L. var. hastata (Willd.) A. DC. | Smilax bona-nox | Smilacaceae
|
| SMBOH2 | Smilax bona-nox L. var. hederifolia (Bey.) Fern. | Smilax bona-nox | Smilacaceae
|
| SMBO2 | Smilax bona-nox L. | saw greenbrier | Smilacaceae
|
| SMCA2 | Smilax californica (A. DC.) Gray | California greenbrier | Smilacaceae
|
| SMCH | Smilax china L. | China root | Smilacaceae
|
| SMCO | Smilax coriacea Spreng. | Everglades greenbrier | Smilacaceae
|
| SMDO | Smilax domingensis Willd. | Smilax smallii | Smilacaceae
|
| SMECB | Smilax ecirrata (Engelm. ex Kunth) S. Wats. var. biltmoreana (Small) Ahles | Smilax biltmoreana | Smilacaceae
|
| SMECH | Smilax ecirrata (Engelm. ex Kunth) S. Wats. var. hugeri (Small) Ahles | Smilax hugeri | Smilacaceae
|
| SMEC | Smilax ecirrata (Engelm. ex Kunth) S. Wats. | upright carrionflower | Smilacaceae
|
| SMGLG2 | Smilax glauca Walt. var. genuina Blake | Smilax glauca | Smilacaceae
|
| SMGLL | Smilax glauca Walt. var. leurophylla Blake | Smilax glauca | Smilacaceae
|
| SMGL | Smilax glauca Walt. | cat greenbrier | Smilacaceae
|
| SMHA | Smilax havanensis auct. non Jacq. | Smilax coriacea | Smilacaceae
|
| SMHEL2 | Smilax herbacea L. var. lasioneura (Hook.) A. DC. | Smilax lasioneura | Smilacaceae
|
| SMHEP2 | Smilax herbacea L. var. pulverulenta (Michx.) Gray | Smilax pulverulenta | Smilacaceae
|
| SMHE | Smilax herbacea L. | smooth carrionflower | Smilacaceae
|
| SMHIA | Smilax hispida Muhl. ex Torr. var. australis Small | Smilax tamnoides | Smilacaceae
|
| SMHIM | Smilax hispida Muhl. ex Torr. var. montana Coker | Smilax tamnoides | Smilacaceae
|
| SMHI | Smilax hispida Muhl. ex Torr. | Smilax tamnoides | Smilacaceae
|
| SMHU | Smilax hugeri (Small) J.B.S. Norton ex Pennell | Huger's carrionflower | Smilacaceae
|
| SMIL | Smilax illinoensis Mangaly | Illinois greenbrier | Smilacaceae
|
| SMJA | Smilax jamesii G. Wallace | English Peak greenbrier | Smilacaceae
|
| SMLA2 | Smilax lanceolata L. | Smilax smallii | Smilacaceae
|
| SMLA3 | Smilax lasioneura Hook. | Blue Ridge carrionflower | Smilacaceae
|
| SMLA | Smilax laurifolia L. | laurel greenbrier | Smilacaceae
|
| SMLE | Smilax leptanthera Pennell | Smilax pseudochina | Smilacaceae
|
| SMME2 | Smilax megacarpa Morong p.p. | Smilax laurifolia | Smilacaceae
|
| SMME2 | Smilax megacarpa Morong p.p. | Smilax walteri | Smilacaceae
|
| SMMES | Smilax melastomifolia Sm. var. subinermis Hbd. | Smilax melastomifolia | Smilacaceae
|
| SMME | Smilax melastomifolia Sm. | Hawai'i greenbrier | Smilacaceae
|
| SMPS | Smilax pseudochina L. | bamboo vine | Smilacaceae
|
| SMPU2 | Smilax pulverulenta Michx. | downy carrionflower | Smilacaceae
|
| SMPU | Smilax pumila Walt. | sarsparilla vine | Smilacaceae
|
| SMRE2 | Smilax regelii Killip & Morton | Jamaican sarsaparilla | Smilacaceae
|
| SMRE | Smilax renifolia Small | kidneyleaf greenbrier | Smilacaceae
|
| SMROC | Smilax rotundifolia L. var. crenulata Small & Heller | Smilax rotundifolia | Smilacaceae
|
| SMROQ | Smilax rotundifolia L. var. quadrangularis (Muhl. ex Willd.) Wood | Smilax rotundifolia | Smilacaceae
|
| SMRO | Smilax rotundifolia L. | roundleaf greenbrier | Smilacaceae
|
| SMSAC | Smilax sandwicensis Kunth var. crassifolia Hbd. | Smilax melastomifolia | Smilacaceae
|
| SMSA | Smilax sandwicensis Kunth | Smilax melastomifolia | Smilacaceae
|
| SMSM | Smilax smallii Morong | lanceleaf greenbrier | Smilacaceae
|
| SMTA3 | Smilax tamnifolia Michx. | Smilax pseudochina | Smilacaceae
|
| SMTAH | Smilax tamnoides L. var. hispida (Muhl. ex Torr.) Fern. | Smilax tamnoides | Smilacaceae
|
| SMTA2 | Smilax tamnoides L. | bristly greenbrier | Smilacaceae
|
| SMWA | Smilax walteri Pursh | coral greenbrier | Smilacaceae
|
| SMILA2 | Smilax L. | greenbrier | Smilacaceae
|
| SMOL | Smyrnium olusatrum L. | Alexanders | Apiaceae
|
| SMYRN | Smyrnium L. | smyrnium | Apiaceae
|
| SMLA4 | Smythea lanceata (Tul.) Summerhayes | | Rhamnaceae
|
| SMYTH | Smythea Seem. | | Rhamnaceae
|
| SOMA10 | Sobralia macrantha Lindl. | | Orchidaceae
|
| SOBRA | Sobralia Ruiz & Pavon | sobralia | Orchidaceae
|
| SOHI5 | Soja hispida Moench | Glycine max | Fabaceae
|
| SOMA8 | Soja max (L.) Piper | Glycine max | Fabaceae
|
| SOGR3 | Solandra grandiflora Sw. | showy chalicevine | Solanaceae
|
| SONI5 | Solandra nitida Zuccagni | chalice vine | Solanaceae
|
| SOLAN2 | Solandra Sw. | solandra | Solanaceae
|
| SOPU4 | Solanoa purpurascens (Gray) Greene | Asclepias solanoana | Asclepiadaceae
|
| SOAC2 | Solanum aculeastrum Dunal | sodaapple nightshade | Solanaceae
|
| SOAC | Solanum aculeatissimum sensu Schulz, non Jacq. | Solanum capsicoides | Solanaceae
|
| SOAD | Solanum adscendens Sendtner | sonoita nightshade | Solanaceae
|
| SOAE2 | Solanum aethiopicum L. | Ethiopian nightshade | Solanaceae
|
| SOAL11 | Solanum alatum Moench | Solanum villosum | Solanaceae
|
| SOAMB | Solanum americanum P. Mill. var. ?baylisii D'Arcy | Solanum nigrescens | Solanaceae
|
| SOAMN | Solanum americanum P. Mill. var. nodiflorum (Jacq.) Edmonds | Solanum americanum | Solanaceae
|
| SOAMP | Solanum americanum P. Mill. var. patulum (L.) Edmonds | Solanum americanum | Solanaceae
|
| SOAM | Solanum americanum P. Mill. | American black nightshade | Solanaceae
|
| SOAM4 | Solanum americanum auct. non P. Mill. | Solanum ptychanthum | Solanaceae
|