| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| SAPUP6 | Sarracenia purpurea L. ssp. purpurea var. purpurea | purple pitcherplant | Sarraceniaceae
|
| SAPUP3 | Sarracenia purpurea L. ssp. purpurea | purple pitcherplant | Sarraceniaceae
|
| SAPUV2 | Sarracenia purpurea L. ssp. venosa (Raf.) Wherry | Sarracenia purpurea ssp. purpurea var. purpurea | Sarraceniaceae
|
| SAPUR | Sarracenia purpurea L. var. ripicola Boivin | Sarracenia purpurea ssp. gibbosa | Sarraceniaceae
|
| SAPUS | Sarracenia purpurea L. var. stolonifera Macfarlane & D.W. Steckbeck | Sarracenia purpurea ssp. gibbosa | Sarraceniaceae
|
| SAPUT | Sarracenia purpurea L. var. terrae-novae La Pylaie | Sarracenia purpurea ssp. gibbosa | Sarraceniaceae
|
| SAPUV | Sarracenia purpurea L. var. venosa (Raf.) Fern. | Sarracenia purpurea ssp. purpurea var. purpurea | Sarraceniaceae
|
| SAPU4 | Sarracenia purpurea L. | purple pitcherplant | Sarraceniaceae
|
| SARE17 | Sarracenia �readii Bell | | Sarraceniaceae
|
| SARE10 | Sarracenia �rehderi Bell | | Sarraceniaceae
|
| SARUA | Sarracenia rubra Walt. ssp. alabamensis (F.W. & R.B. Case) Schnell | Alabama pitcherplant | Sarraceniaceae
|
| SARUG | Sarracenia rubra Walt. ssp. gulfensis Schnell | Gulf pitcherplant | Sarraceniaceae
|
| SARUJ | Sarracenia rubra Walt. ssp. jonesii (Wherry) Wherry | Jones' pitcherplant | Sarraceniaceae
|
| SARUR | Sarracenia rubra Walt. ssp. rubra | sweet pitcherplant | Sarraceniaceae
|
| SARUW | Sarracenia rubra Walt. ssp. wherryi (F.W. & R.B. Case) Schnell | Wherry's pitcherplant | Sarraceniaceae
|
| SARU4 | Sarracenia rubra Walt. | sweet pitcherplant | Sarraceniaceae
|
| SASL | Sarracenia sledgei Macfarlane | Sarracenia alata | Sarraceniaceae
|
| SASW | Sarracenia �swaniana hort. ex Wm. Robins. (pro sp.) | | Sarraceniaceae
|
| SAWR2 | Sarracenia �wrigleyana S.G. (pro sp.) | | Sarraceniaceae
|
| SARRA | Sarracenia L. | pitcherplant | Sarraceniaceae
|
| SAFL5 | Sartwellia flaveriae Gray | threadleaf glowwort | Asteraceae
|
| SAPU12 | Sartwellia puberula Rydb. | Sartwellia flaveriae | Asteraceae
|
| SARTW | Sartwellia Gray | glowwort | Asteraceae
|
| SAJA4 | Sasa japonica (Sieb. & Zucc. ex Steud.) Makino | Pseudosasa japonica | Poaceae
|
| SAPA31 | Sasa palmata (Milford) E.G. Camas | broadleaf bamboo | Poaceae
|
| SASA20 | Sasa Makino & Shib. | broadleaf bamboo | Poaceae
|
| SAALM2 | Sassafras albidum (Nutt.) Nees var. molle (Raf.) Fern. | Sassafras albidum | Lauraceae
|
| SAAL5 | Sassafras albidum (Nutt.) Nees | sassafras | Lauraceae
|
| SAOF5 | Sassafras officinale Nees & Eberm. | Sassafras albidum | Lauraceae
|
| SASA17 | Sassafras sassafras (L.) Karst. | Sassafras albidum | Lauraceae
|
| SAVA7 | Sassafras variifolium (Salisb.) Kuntze | Sassafras albidum | Lauraceae
|
| SASSA | Sassafras Nees & Eberm. | sassafras | Lauraceae
|
| SAAC | Satureja acinos (L.) Scheele | Acinos arvensis | Lamiaceae
|
| SAAR11 | Satureja arkansana (Nutt.) Briq. | Clinopodium arkansanum | Lamiaceae
|
| SAAS | Satureja ashei Weatherby | Clinopodium ashei | Lamiaceae
|
| SABR19 | Satureja brownei (Sw.) Briq. | Clinopodium brownei | Lamiaceae
|
| SACAA | Satureja calamintha (L.) Scheele ssp. ascendens (Jord.) Briq. | Calamintha sylvatica ssp. ascendens | Lamiaceae
|
| SACAG | Satureja calamintha (L.) Scheele var. glandulosa (Riquien) Briq. | Calamintha nepeta ssp. glandulosa | Lamiaceae
|
| SACAN | Satureja calamintha (L.) Scheele var. nepeta (L.) Briq. | Calamintha nepeta ssp. nepeta | Lamiaceae
|
| SACAN2 | Satureja calamintha (L.) Scheele var. nepetoides (Jord.) Briq. | Calamintha nepeta ssp. nepeta | Lamiaceae
|
| SACA16 | Satureja calamintha (L.) Scheele | Calamintha nepeta ssp. glandulosa | Lamiaceae
|
| SACA28 | Satureja caroliniana auct. non (Michx.) Briq. | Clinopodium georgianum | Lamiaceae
|
| SACH11 | Satureja chamissonis (Benth.) Briq. | Clinopodium douglasii | Lamiaceae
|
| SACH3 | Satureja chandleri (Brandeg.) Druce | Clinopodium chandleri | Lamiaceae
|
| SACO9 | Satureja coccinea (Nutt. ex Hook.) Bertol. | Clinopodium coccineum | Lamiaceae
|
| SADE5 | Satureja dentata (Chapman) Briq. | Clinopodium dentatum | Lamiaceae
|
| SADO5 | Satureja douglasii (Benth.) Briq. | Clinopodium douglasii | Lamiaceae
|
| SAGE3 | Satureja georgiana (Harper) Ahles | Clinopodium georgianum | Lamiaceae
|
| SAGLA2 | Satureja glabella (Michx.) Briq. var. angustifolia (Torr.) Svens. | Clinopodium arkansanum | Lamiaceae
|
| SAGL6 | Satureja glabella (Michx.) Briq. | Clinopodium glabellum | Lamiaceae
|
| SAGL8 | Satureja glabra (Nutt.) Fern. | Clinopodium arkansanum | Lamiaceae
|
| SAHO3 | Satureja hortensis L. | summer savory | Lamiaceae
|
| SAMI4 | Satureja mimuloides (Benth.) Briq. | Clinopodium mimuloides | Lamiaceae
|
| SAMO6 | Satureja montana L. | winter savory | Lamiaceae
|
| SANE5 | Satureja nepeta (L.) Scheele | Calamintha nepeta ssp. nepeta | Lamiaceae
|
| SARI6 | Satureja rigida Bartr. ex Benth. | Piloblephis rigida | Lamiaceae
|
| SASYA | Satureja sylvatica (Bromf.) K. Maly ssp. ascendens (Jord.) Taylor & MacBryde | Calamintha sylvatica ssp. ascendens | Lamiaceae
|
| SAVI7 | Satureja viminea L. | serpentine savory | Lamiaceae
|
| SAVUD | Satureja vulgaris (L.) Fritsch var. diminuta (Simon) Fern. & Wieg. | Clinopodium vulgare | Lamiaceae
|
| SAVUN | Satureja vulgaris (L.) Fritsch var. neogaea Fern. | Clinopodium vulgare | Lamiaceae
|
| SAVU | Satureja vulgaris (L.) Fritsch | Clinopodium vulgare | Lamiaceae
|
| SATUR | Satureja L. | savory | Lamiaceae
|
| SAAN13 | Sauropus androgynus (L.) Merr. | chekkurmanis | Euphorbiaceae
|
| SAURO | Sauropus Blume | sauropus | Euphorbiaceae
|
| SACE | Saururus cernuus L. | lizard's tail | Saururaceae
|
| SAURU | Saururus L. | saururus | Saururaceae
|
| SAAM3 | Saussurea americana D.C. Eat. | American saw-wort | Asteraceae
|
| SAANY2 | Saussurea angustifolia (Willd.) DC. ssp. yukonensis (Porsild) Cody | Saussurea angustifolia var. yukonensis | Asteraceae
|
| SAANA3 | Saussurea angustifolia (Willd.) DC. var. angustifolia | narrowleaf saw-wort | Asteraceae
|
| SAANV | Saussurea angustifolia (Willd.) DC. var. viscida (Hult�n) Welsh | Saussurea viscida | Asteraceae
|
| SAANY | Saussurea angustifolia (Willd.) DC. var. yukonensis Porsild | narrowleaf saw-wort | Asteraceae
|
| SAAN3 | Saussurea angustifolia (Willd.) DC. | narrowleaf saw-wort | Asteraceae
|
| SADE3 | Saussurea densa (Hook.) Rydb. | clustered sawwort | Asteraceae
|
| SANUD2 | Saussurea nuda Ledeb. ssp. densa (Hook.) G.W. Douglas | Saussurea densa | Asteraceae
|
| SANUD | Saussurea nuda Ledeb. var. densa (Hook.) Hult�n | Saussurea densa | Asteraceae
|
| SANU | Saussurea nuda Ledeb. | nutty saw-wort | Asteraceae
|
| SATS | Saussurea �tschuktschorum Lipsch. (pro sp.) | | Asteraceae
|
| SAVIY | Saussurea viscida Hult�n var. yukonensis (Porsild) Hult�n | Saussurea angustifolia var. yukonensis | Asteraceae
|
| SAVI4 | Saussurea viscida Hult�n | sticky saw-wort | Asteraceae
|
| SAWE | Saussurea weberi Hult�n | Weber's saw-wort | Asteraceae
|
| SAUSS | Saussurea DC. | saw-wort | Asteraceae
|
| SAAL20 | Sauteria alpina (Nees) Nees | | Cleveaceae
|
| SAUTE | Sauteria Nees | | Cleveaceae
|
| SAER4 | Sauvagesia erecta L. | creole tea | Ochnaceae
|
| SAUVA | Sauvagesia L. | sauvagesia | Ochnaceae
|
| SAAL14 | Savastana alpina (Sw. ex Willd.) Scribn. | Hierochloe alpina ssp. alpina | Poaceae
|
| SANA2 | Savastana nashii Bickn. | Hierochloe odorata | Poaceae
|
| SAOD3 | Savastana odorata (L.) Scribn. | Hierochloe odorata | Poaceae
|
| SAPA17 | Savastana pauciflora (R. Br.) Scribn. & Merr. | Hierochloe pauciflora | Poaceae
|
| SAAR23 | Savia arida Warnock & M.C. Johnston | Leptopus phyllanthoides | Euphorbiaceae
|
| SABA6 | Savia bahamensis Britt. | Bahama maidenbush | Euphorbiaceae
|
| SAPH5 | Savia phyllanthoides (Nutt.) Pax & K. Hoffmann | Leptopus phyllanthoides | Euphorbiaceae
|
| SASE6 | Savia sessiliflora (Sw.) Willd. | amansa guapo | Euphorbiaceae
|
| SAVIA | Savia Willd. | savia | Euphorbiaceae
|
| SAADO2 | Saxifraga adscendens L. ssp. oregonensis (Raf.) Bacig. | small saxifrage | Saxifragaceae
|
| SAADO | Saxifraga adscendens L. var. oregonensis (Raf.) Breitung | Saxifraga adscendens ssp. oregonensis | Saxifragaceae
|
| SAAD | Saxifraga adscendens L. | wedgeleaf saxifrage | Saxifragaceae
|
| SAAE3 | Saxifraga aequidentata (Small) Rosendahl | Saxifraga rufidula | Saxifragaceae
|
| SAAE5 | Saxifraga aestivalis Fisch. & C.A. Mey. | Saxifraga nelsoniana ssp. nelsoniana | Saxifragaceae
|
| SAAE4 | Saxifraga aestivalis auct. p.p. non Fisch. & C.A. Mey. | Saxifraga odontoloma | Saxifragaceae
|
| SAAI | Saxifraga aizoides L. | yellow mountain saxifrage | Saxifragaceae
|