| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| SECH2 | Setaria chapmanii (Vasey) Pilger | Paspalidium chapmanii | Poaceae
|
| SECO4 | Setaria corrugata (Ell.) J.A. Schultes | coastal bristlegrass | Poaceae
|
| SEDE5 | Setaria decipiens Schimp. ex Nyman | Setaria verticilliformis | Poaceae
|
| SEFA | Setaria faberi Herrm. | Japanese bristlegrass | Poaceae
|
| SEFI | Setaria firmula (A.S. Hitchc. & Chase) Pilger | knot grass | Poaceae
|
| SEGE4 | Setaria geminata (Forsk.) Veldkamp | Paspalidium geminatum var. geminatum | Poaceae
|
| SEGE | Setaria geniculata auct. non (Wild.) Beauv. | Setaria parviflora | Poaceae
|
| SEGEP | Setaria germinata (Forsk.) Veldkamp var. paludivaga (A.S. Hitchc. & Chase) R. Webster | Paspalidium geminatum var. paludivagum | Poaceae
|
| SEGLP | Setaria glauca (L.) Beauv. var. pallidifusca (Schumacher) T. Koyama | Setaria pumila ssp. pallidifusca | Poaceae
|
| SEGL2 | Setaria glauca (L.) Beauv. | Pennisetum glaucum | Poaceae
|
| SEGL8 | Setaria glauca sensu Vickery | Setaria pumila ssp. pallidifusca | Poaceae
|
| SEGR7 | Setaria gracilis Kunth | Setaria parviflora | Poaceae
|
| SEGR6 | Setaria grisebachii Fourn. | Grisebach's bristlegrass | Poaceae
|
| SEGU | Setaria gussonei Kergu�len | Setaria verticilliformis | Poaceae
|
| SEITM | Setaria italica (L.) Beauv. var. metzgeri (Koern.) J�v. | Setaria italica | Poaceae
|
| SEITS | Setaria italica (L.) Beauv. var. stramineofructa (F.T. Hubbard) Bailey | Setaria italica | Poaceae
|
| SEIT | Setaria italica (L.) Beauv. | foxtail bristlegrass | Poaceae
|
| SELE9 | Setaria leiophylla (Nees) Kunth | Setaria setosa var. leiophylla | Poaceae
|
| SELE6 | Setaria leucopila (Scribn. & Merr.) K. Schum. | streambed bristlegrass | Poaceae
|
| SELI3 | Setaria liebmannii Fourn. | Liebmann's bristlegrass | Poaceae
|
| SELU4 | Setaria lutescens (Weigel) F.T. Hubbard | Pennisetum glaucum | Poaceae
|
| SEMA4 | Setaria macrosperma (Scribn. & Merr.) K. Schum. | coral bristlegrass | Poaceae
|
| SEMA5 | Setaria macrostachya Kunth | Setaria vulpiseta | Poaceae
|
| SEMA6 | Setaria magna Griseb. | giant bristlegrass | Poaceae
|
| SEME6 | Setaria megaphylla (Steud.) T. Dur. & Schinz | bigleaf bristlegrass | Poaceae
|
| SENI2 | Setaria nigrirostris (Nees) T. Dur. & Schinz | black bristlegrass | Poaceae
|
| SEPA82 | Setaria pallidifusca (Schumacher) Stapf & C.E. Hubbard | Setaria pumila ssp. pallidifusca | Poaceae
|
| SEPA6 | Setaria palmifolia (Koenig) Stapf | palmgrass | Poaceae
|
| SEPA16 | Setaria palmifolia auct. non (Koenig) Stapf | Setaria megaphylla | Poaceae
|
| SEPA10 | Setaria parviflora (Poir.) Kergu�len | marsh bristlegrass | Poaceae
|
| SEPR | Setaria pradana (L�on ex A.S. Hitchc.) L�on | roadside bristlegrass | Poaceae
|
| SEPUP | Setaria pumila (Poir.) Roemer & J.A. Schultes ssp. pallidifusca (Schumacher) B.K. Simon | yellow bristlegrass | Poaceae
|
| SEPU8 | Setaria pumila (Poir.) Roemer & J.A. Schultes | yellow bristlegrass | Poaceae
|
| SERA3 | Setaria ramiseta (Scribn.) Pilger | Rio Grande bristlegrass | Poaceae
|
| SERA2 | Setaria rariflora Mikan ex Trin. | Brazilian bristlegrass | Poaceae
|
| SERE3 | Setaria reverchonii (Vasey) Pilger | Reverchon's bristlegrass | Poaceae
|
| SESC2 | Setaria scheelei (Steud.) A.S. Hitchc. | southwestern bristlegrass | Poaceae
|
| SESEL2 | Setaria setosa (Sw.) Beauv. var. leiophylla (Nees) Arech. | West Indian bristlegrass | Poaceae
|
| SESES2 | Setaria setosa (Sw.) Beauv. var. setosa | West Indian bristlegrass | Poaceae
|
| SESE4 | Setaria setosa (Sw.) Beauv. | West Indian bristlegrass | Poaceae
|
| SESP5 | Setaria sphacelata (Schumacher) Moss | African bristlegrass | Poaceae
|
| SETE9 | Setaria tenacissima Schrad. | tropical bristlegrass | Poaceae
|
| SETE6 | Setaria texana W.H.P. Emery | Texas bristlegrass | Poaceae
|
| SEUT2 | Setaria utowanaea (Scribn. ex Millsp.) Pilger | Caribbean bristlegrass | Poaceae
|
| SEVEA | Setaria verticillata (L.) Beauv. var. ambigua (Guss.) Parl. | Setaria verticilliformis | Poaceae
|
| SEVER2 | Setaria verticillata (L.) Beauv. var. respiciens (A. Rich.) A. Braun | Setaria adhaerens | Poaceae
|
| SEVE3 | Setaria verticillata (L.) Beauv. | hooked bristlegrass | Poaceae
|
| SEVE5 | Setaria verticilliformis Dunart. | barbed bristlegrass | Poaceae
|
| SEVI3 | Setaria villosissima (Scribn. & Merr.) K. Schum. | hairyleaf bristlegrass | Poaceae
|
| SEVIA | Setaria viridis (L.) Beauv. var. ambigua (Guss.) Coss. & Durieu | Setaria verticilliformis | Poaceae
|
| SEVIB | Setaria viridis (L.) Beauv. var. breviseta (Doell) A.S. Hitchc. | Setaria viridis var. viridis | Poaceae
|
| SEVIM | Setaria viridis (L.) Beauv. var. major (Gaudin) Pospichal | green bristlegrass | Poaceae
|
| SEVIR | Setaria viridis (L.) Beauv. var. robustaalba Schreib. | Setaria viridis var. major | Poaceae
|
| SEVIR2 | Setaria viridis (L.) Beauv. var. robustapurpurea Schreib. | Setaria viridis var. major | Poaceae
|
| SEVIV | Setaria viridis (L.) Beauv. var. viridis | green bristlegrass | Poaceae
|
| SEVIW | Setaria viridis (L.) Beauv. var. weinmannii (Roemer & J.A. Schultes) Borb�s | Setaria viridis var. viridis | Poaceae
|
| SEVI4 | Setaria viridis (L.) Beauv. | green bristlegrass | Poaceae
|
| SEVU2 | Setaria vulpiseta (Lam.) Roemer & J.A. Schultes | plains bristlegrass | Poaceae
|
| SETAR | Setaria Beauv. | bristlegrass | Poaceae
|
| SEBR2 | Setcreasea brevifolia (Torr.) Pilger | Tradescantia brevifolia | Commelinaceae
|
| SEBU | Setcreasea buckleyi I.M. Johnston | Tradescantia buckleyi | Commelinaceae
|
| SELEG | Setcreasea leiandra (Torr.) Pilger var. glandulosa Correll | Tradescantia leiandra var. glandulosa | Commelinaceae
|
| SELE5 | Setcreasea leiandra (Torr.) Pilger | Tradescantia leiandra var. leiandra | Commelinaceae
|
| SEOV2 | Setcreasea ovata (Coult.) Faruqi, Celarier & Mehra | Tradescantia brevifolia | Commelinaceae
|
| SEPU11 | Setcreasea purpurea B.K. Boom | Tradescantia pallida | Commelinaceae
|
| SECL4 | Setiscapella cleistogama (Gray) Barnh. | Utricularia subulata | Lentibulariaceae
|
| SEPU12 | Setiscapella pusilla (Vahl) Barnh. | Utricularia pusilla | Lentibulariaceae
|
| SESU9 | Setiscapella subulata (L.) Barnh. | Utricularia subulata | Lentibulariaceae
|
| SECR7 | Seubertia crocea Wood | Triteleia crocea var. crocea | Liliaceae
|
| SEMO6 | Severinia monophylla (L.) Tanaka | Chinese boxorange | Rutaceae
|
| SEVER | Severinia Ten. ex Endl. | severinia | Rutaceae
|
| SEBI6 | Seymeria bipinnatisecta Seem. | Eagle Pass blacksenna | Scrophulariaceae
|
| SECA4 | Seymeria cassioides (J.F. Gmel.) Blake | yaupon blacksenna | Scrophulariaceae
|
| SEHA4 | Seymeria havardii (Pennell) Standl. | Seymeria bipinnatisecta | Scrophulariaceae
|
| SEMA10 | Seymeria macrophylla Nutt. | Dasistoma macrophylla | Scrophulariaceae
|
| SEPEP3 | Seymeria pectinata Pursh ssp. pectinata | piedmont blacksenna | Scrophulariaceae
|
| SEPEP | Seymeria pectinata Pursh ssp. peninsularis (Pennell) Pennell | piedmont blacksenna | Scrophulariaceae
|
| SEPE2 | Seymeria pectinata Pursh | piedmont blacksenna | Scrophulariaceae
|
| SESC3 | Seymeria scabra Gray | limpia blacksenna | Scrophulariaceae
|
| SETE7 | Seymeria texana (Gray) Pennell | Texas blacksenna | Scrophulariaceae
|
| SEYME | Seymeria Pursh | blacksenna | Scrophulariaceae
|
| SHSE | Sharpiella seligeri (Brid.) Iwats. | Herzogiella seligeri | Hypnaceae
|
| SHST | Sharpiella striatella (Brid.) Iwats. | Herzogiella striatella | Hypnaceae
|
| SHTU | Sharpiella turfacea (Lindb.) Iwats. | Herzogiella turfacea | Hypnaceae
|
| SHAR | Shepherdia argentea (Pursh) Nutt. | silver buffaloberry | Elaeagnaceae
|
| SHCA | Shepherdia canadensis (L.) Nutt. | russet buffaloberry | Elaeagnaceae
|
| SHRO | Shepherdia rotundifolia Parry | roundleaf buffaloberry | Elaeagnaceae
|
| SHEPH | Shepherdia Nutt. | buffaloberry | Elaeagnaceae
|
| SHAR2 | Sherardia arvensis L. | blue fieldmadder | Rubiaceae
|
| SHERA | Sherardia L. | sherardia | Rubiaceae
|
| SHGA2 | Sherwoodia galacifolia (Torr. & Gray) House | Shortia galacifolia var. galacifolia | Diapensiaceae
|
| SHRI | Shinnersia rivularis (Gray) King & H.E. Robins. | Trichocoronis rivularis | Asteraceae
|
| SHRO2 | Shinnersoseris rostrata (Gray) S. Tomb | beaked skeletonweed | Asteraceae
|
| SHINN2 | Shinnersoseris S. Tomb | beaked skeletonweed | Asteraceae
|
| SHRO3 | Shorea robusta Gaertner f. | sal tree | Dipterocarpaceae
|
| SHORE | Shorea Roxb. ex Gaertner f. | shorea | Dipterocarpaceae
|
| SHGAB | Shortia galacifolia Torr. & Gray var. brevistyla Davies | Oconee bells | Diapensiaceae
|
| SHGAG | Shortia galacifolia Torr. & Gray var. galacifolia | Oconee bells | Diapensiaceae
|
| SHGA | Shortia galacifolia Torr. & Gray | Oconee bells | Diapensiaceae
|
| SHUN | Shortia uniflora Maxim. | Nippon bells | Diapensiaceae
|
| SHORT | Shortia Torr. & Gray | shortia | Diapensiaceae
|