| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| SAPIU | Sapium Jacq. | milktree | Euphorbiaceae
|
| SAOC80 | Saponaria ocymoides L. | rock soapwort | Caryophyllaceae
|
| SAOF4 | Saponaria officinalis L. | bouncingbet | Caryophyllaceae
|
| SAPO8 | Saponaria porrigens L. | Gypsophila pilosa | Caryophyllaceae
|
| SAPU13 | Saponaria pumilio (L.) Fenzl ex A. Braun | pygmy pink | Caryophyllaceae
|
| SAVA4 | Saponaria vaccaria L. | Vaccaria hispanica | Caryophyllaceae
|
| SAPON | Saponaria L. | soapwort | Caryophyllaceae
|
| SAAC4 | Sapota achras P. Mill. | Manilkara zapota | Sapotaceae
|
| SAZA | Sapota zapotilla (Jacq.) Cov. | manilkara zapota | Sapotaceae
|
| SAPOT | Sapota Miller | sapota | Sapotaceae
|
| SAAN4 | Saracha antillana Krug & Urban | Jaltomata antillana | Solanaceae
|
| SAPR5 | Saracha procumbens (Cav.) Ruiz & Pav�n | Jaltomata procumbens | Solanaceae
|
| SABA14 | Sarcobatus baileyi Coville | Sarcobatus vermiculatus | Chenopodiaceae
|
| SAVEB | Sarcobatus vermiculatus (Hook.) Torr. var. baileyi (Coville) Jepson | Sarcobatus vermiculatus | Chenopodiaceae
|
| SAVE4 | Sarcobatus vermiculatus (Hook.) Torr. | greasewood | Chenopodiaceae
|
| SARCO | Sarcobatus Nees | greasewood | Chenopodiaceae
|
| SAPAU | Sarcocornia pacifica (Standl.) A.J. Scott var. utahensis (Tidestrom) Munz | Sarcocornia utahensis | Chenopodiaceae
|
| SAPA30 | Sarcocornia pacifica (Standl.) A.J. Scott | Pacific swampfire | Chenopodiaceae
|
| SAPE11 | Sarcocornia perennis (P. Mill.) A.J. Scott | chickenclaws | Chenopodiaceae
|
| SAUT2 | Sarcocornia utahensis (Tidestrom) A.J. Scott | Utah swampfire | Chenopodiaceae
|
| SARCO5 | Sarcocornia A.J. Scott | swampfire | Chenopodiaceae
|
| SASA5 | Sarcodes sanguinea Torr. | snowplant | Monotropaceae
|
| SARCO2 | Sarcodes Torr. | snowplant | Monotropaceae
|
| SAIN14 | Sarcographa intricans (Nyl.) Mull. Arg. | | Graphidaceae
|
| SALA20 | Sarcographa labyrinthica (Ach.) Mull. Arg. | | Graphidaceae
|
| SAME10 | Sarcographa medusulina (Nyl.) Mull. Arg. | | Graphidaceae
|
| SATR9 | Sarcographa tricosa (Ach.) Mull. Arg. | | Graphidaceae
|
| SARCO6 | Sarcographa Fee | sarcographa | Graphidaceae
|
| SAAN12 | Sarcogyne anthroocarpa H. Magn. | | Acarosporaceae
|
| SABI6 | Sarcogyne bicolor H. Magn. | | Acarosporaceae
|
| SABO7 | Sarcogyne bolleana H. Magn. | | Acarosporaceae
|
| SACA42 | Sarcogyne californica H. Magn. | | Acarosporaceae
|
| SACL5 | Sarcogyne clavus (DC.) Krempelh. | | Acarosporaceae
|
| SADA3 | Sarcogyne dakotensis H. Magn. | | Acarosporaceae
|
| SAIN11 | Sarcogyne integra (de Lesd.) H. Magn. | | Acarosporaceae
|
| SAKU2 | Sarcogyne kuleshanensis (Herre) | | Acarosporaceae
|
| SAMA20 | Sarcogyne magnusonii de Lesd. | | Acarosporaceae
|
| SANO4 | Sarcogyne novomexicana H. Magn. | | Acarosporaceae
|
| SAOL3 | Sarcogyne oligospora H. Magn. | | Acarosporaceae
|
| SAPR13 | Sarcogyne privigna (Ach.) A. Massal. | | Acarosporaceae
|
| SAPR14 | Sarcogyne pruinosa auct. | Sarcogyne regularis | Acarosporaceae
|
| SARE18 | Sarcogyne regularis Korber | | Acarosporaceae
|
| SASI14 | Sarcogyne similis H. Magn. | | Acarosporaceae
|
| SASI15 | Sarcogyne simplex (Davies) Nyl. | Polysporina simplex | Acarosporaceae
|
| SARCO7 | Sarcogyne Flotow | sarcogyne | Acarosporaceae
|
| SADO9 | Sarcomphalus domingensis (Spreng.) Krug & Urban | Ziziphus rignonii | Rhamnaceae
|
| SARE14 | Sarcomphalus reticulatus (Vahl) Urban | Ziziphus reticulata | Rhamnaceae
|
| SATA3 | Sarcomphalus taylorii Britt. | Ziziphus taylorii | Rhamnaceae
|
| SAPA35 | Sarcopygme pacifica (Reinecke) Setchell & Christophersen | | Rubiaceae
|
| SARCO10 | Sarcopygme Setch. & Christoph. | | Rubiaceae
|
| SACY7 | Sarcopyrenia cylindrospora (Crouan & Crouan) Aguirre | | Uncertain Lichen Family
|
| SARCO9 | Sarcopyrenia Nyl. | sarcopyrenia | Uncertain Lichen Family
|
| SACA43 | Sarcosagium campestre (Fr.) Poetsch & Schiedem. | | Acarosporaceae
|
| SARCO8 | Sarcosagium A. Massal. | sarcosagium | Acarosporaceae
|
| SACL3 | Sarcostemma clausum (Jacq.) J.A. Schultes | Funastrum clausum | Asclepiadaceae
|
| SACR3 | Sarcostemma crispum Benth. | Funastrum crispum | Asclepiadaceae
|
| SACYH2 | Sarcostemma cynanchoides Dcne. ssp. hartwegii (Vail) R. Holm | Funastrum cynanchoides ssp. heterophyllum | Asclepiadaceae
|
| SACYH | Sarcostemma cynanchoides Dcne. var. hartwegii (Vail) Shinners | Funastrum cynanchoides ssp. heterophyllum | Asclepiadaceae
|
| SACY2 | Sarcostemma cynanchoides Dcne. | Funastrum cynanchoides ssp. cynanchoides | Asclepiadaceae
|
| SAHI2 | Sarcostemma hirtellum (Gray) R. Holm | Funastrum hirtellum | Asclepiadaceae
|
| SALO5 | Sarcostemma lobata Waterfall | Funastrum crispum | Asclepiadaceae
|
| SATO | Sarcostemma torreyi (Gray) Woods. | Funastrum torreyi | Asclepiadaceae
|
| SADI6 | Sarea difformis (Fr.) Fr. | | Agyriaceae
|
| SARE19 | Sarea resinae (Fr.) Kuntze | | Agyriaceae
|
| SAREA | Sarea Fr. | sarea | Agyriaceae
|
| SAAR22 | Sargentia aricocca H. Wendl. & Drude | Pseudophoenix sargentii ssp. sargentii | Arecaceae
|
| SAOL2 | Saribus oliviformis Hassk. | Livistona chinensis | Arecaceae
|
| SAMA23 | Saritaea magnifica (Sprague) Dugand | glowvine | Bignoniaceae
|
| SARIT | Saritaea Dugand | glowvine | Bignoniaceae
|
| SASA19 | Sarmenthypnum sarmentosum (Wahlenb.) Tuom. & T. Kop. | sarmenthypnum moss | Amblystegiaceae
|
| SARME | Sarmenthypnum Tuom. & T. Kop. | sarmenthypnum moss | Amblystegiaceae
|
| SASC6 | Sarothamnus scoparius (L.) Wimmer ex Koch | Cytisus scoparius | Fabaceae
|
| SADR4 | Sarothra drummondii Grev. & Hook. | Hypericum drummondii | Clusiaceae
|
| SAGE6 | Sarothra gentianoides L. | Hypericum gentianoides | Clusiaceae
|
| SAAH | Sarracenia �ahlesii Bell & Case | | Sarraceniaceae
|
| SAALW | Sarracenia alabamensis F.W. & R.B. Case ssp. wherryi F.W. & R.B. Case | Sarracenia rubra ssp. wherryi | Sarraceniaceae
|
| SAAL11 | Sarracenia alabamensis F.W. & R.B. Case | Sarracenia rubra ssp. alabamensis | Sarraceniaceae
|
| SAAL4 | Sarracenia alata Wood | yellow trumpets | Sarraceniaceae
|
| SAAR24 | Sarracenia �areolata Macfarlane (pro sp.) | | Sarraceniaceae
|
| SACA23 | Sarracenia �catesbaei Ell. (pro sp.) | | Sarraceniaceae
|
| SACH7 | Sarracenia �chelsonii Veitch ex Masters | | Sarraceniaceae
|
| SADR3 | Sarracenia drummondii Croom | Sarracenia leucophylla | Sarraceniaceae
|
| SAEX4 | Sarracenia �exornata S.G. (pro sp.) | | Sarraceniaceae
|
| SAFL4 | Sarracenia flava L. | yellow pitcherplant | Sarraceniaceae
|
| SAFO3 | Sarracenia �formosa Veitch ex Masters | | Sarraceniaceae
|
| SAGI2 | Sarracenia �gilpinii Bell & Case | | Sarraceniaceae
|
| SAHA7 | Sarracenia �harperi Bell | | Sarraceniaceae
|
| SAHE5 | Sarracenia heterophylla Eat. | Sarracenia purpurea ssp. gibbosa | Sarraceniaceae
|
| SAJO | Sarracenia jonesii Wherry | Sarracenia rubra ssp. jonesii | Sarraceniaceae
|
| SALE4 | Sarracenia leucophylla Raf. | crimson pitcherplant | Sarraceniaceae
|
| SAMA7 | Sarracenia �mandaiana J.R. Pitcher & W.A. Manda | Sarracenia moorei | Sarraceniaceae
|
| SAMI9 | Sarracenia minor Walt. | hooded pitcherplant | Sarraceniaceae
|
| SAMI21 | Sarracenia �mitchelliana Nichols. (pro sp.) | | Sarraceniaceae
|
| SAMO13 | Sarracenia mooreana Veitch | Sarracenia moorei | Sarraceniaceae
|
| SAMO7 | Sarracenia �moorei Masters | | Sarraceniaceae
|
| SAOR3 | Sarracenia oreophila (Kearney) Wherry | green pitcherplant | Sarraceniaceae
|
| SAPO4 | Sarracenia �popei hort. ex Masters | | Sarraceniaceae
|
| SAPS2 | Sarracenia psittacina Michx. | parrot pitcherplant | Sarraceniaceae
|
| SAPUG | Sarracenia purpurea L. ssp. gibbosa (Raf.) Wherry | purple pitcherplant | Sarraceniaceae
|
| SAPUH | Sarracenia purpurea L. ssp. heterophylla (Eat.) Torr. | Sarracenia purpurea ssp. gibbosa | Sarraceniaceae
|
| SAPUB | Sarracenia purpurea L. ssp. purpurea var. burkii Schnell | purple pitcherplant | Sarraceniaceae
|