| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| SACU | Sagittaria cuneata Sheldon | arumleaf arrowhead | Alismataceae
|
| SACY5 | Sagittaria cycloptera (J.G. Sm.) C. Mohr | Sagittaria graminea var. graminea | Alismataceae
|
| SADE11 | Sagittaria demersa J.G. Sm. | | Alismataceae
|
| SAEA3 | Sagittaria eatonii J.G. Sm. | Sagittaria graminea var. graminea | Alismataceae
|
| SAENB2 | Sagittaria engelmanniana J.G. Sm. ssp. brevirostra (Mackenzie & Bush) Bogin | Sagittaria brevirostra | Alismataceae
|
| SAENL3 | Sagittaria engelmanniana J.G. Sm. ssp. longirostra (Micheli) Bogin | Sagittaria latifolia | Alismataceae
|
| SAENL2 | Sagittaria engelmanniana J.G. Sm. ssp. longirostra auct. non Micheli | Sagittaria australis | Alismataceae
|
| SAEN | Sagittaria engelmanniana J.G. Sm. | Engelmann's arrowhead | Alismataceae
|
| SAES2 | Sagittaria esculenta T.J. Howell | Sagittaria latifolia | Alismataceae
|
| SAFA4 | Sagittaria falcata Pursh | Sagittaria lancifolia ssp. media | Alismataceae
|
| SAFA5 | Sagittaria fasciculata E.O. Beal | bunched arrowhead | Alismataceae
|
| SAFI2 | Sagittaria filiformis J.G. Sm. | threadleaf arrowhead | Alismataceae
|
| SAGRC5 | Sagittaria graminea Michx. ssp. chapmanii (J.G. Sm.) Haynes & C.B. Hellquist | Sagittaria graminea var. chapmanii | Alismataceae
|
| SAGRW2 | Sagittaria graminea Michx. ssp. weatherbiana (Fern.) Haynes & C.B. Hellquist | Sagittaria graminea var. weatherbiana | Alismataceae
|
| SAGRC2 | Sagittaria graminea Michx. var. chapmanii J.G. Sm. | Chapman's arrowhead | Alismataceae
|
| SAGRC4 | Sagittaria graminea Michx. var. cristata (Engelm.) Bogin | Sagittaria cristata | Alismataceae
|
| SAGRG | Sagittaria graminea Michx. var. graminea | grassy arrowhead | Alismataceae
|
| SAGRM | Sagittaria graminea Michx. var. macrocarpa (J.G. Sm.) Bogin | Sagittaria fasciculata | Alismataceae
|
| SAGRP2 | Sagittaria graminea Michx. var. platyphylla Engelm. | Sagittaria platyphylla | Alismataceae
|
| SAGRT | Sagittaria graminea Michx. var. teres (S. Wats.) Bogin | Sagittaria teres | Alismataceae
|
| SAGRW | Sagittaria graminea Michx. var. weatherbiana (Fern.) Bogin | Weatherby's arrowhead | Alismataceae
|
| SAGR | Sagittaria graminea Michx. | grassy arrowhead | Alismataceae
|
| SAGR2 | Sagittaria greggii J.G. Sm. | Sagittaria longiloba | Alismataceae
|
| SAGU | Sagittaria guayanensis Kunth | Guyanese arrowhead | Alismataceae
|
| SAIN10 | Sagittaria intermedia Micheli | intermediate arrowhead | Alismataceae
|
| SAIS | Sagittaria isoetiformis J.G. Sm. | quillwort arrowhead | Alismataceae
|
| SAKU | Sagittaria kurziana Gl�ck | springtape | Alismataceae
|
| SALAL7 | Sagittaria lancifolia L. ssp. lancifolia | bulltongue arrowhead | Alismataceae
|
| SALAM2 | Sagittaria lancifolia L. ssp. media (Micheli) Bogin | bulltongue arrowhead | Alismataceae
|
| SALAM3 | Sagittaria lancifolia L. var. media Micheli | Sagittaria lancifolia ssp. media | Alismataceae
|
| SALA | Sagittaria lancifolia L. | bulltongue arrowhead | Alismataceae
|
| SALAO | Sagittaria latifolia Willd. var. obtusa (Engelm.) Wieg. | Sagittaria latifolia | Alismataceae
|
| SALAP | Sagittaria latifolia Willd. var. pubescens (Muhl. ex Nutt.) J.G. Sm. | Sagittaria latifolia | Alismataceae
|
| SALA2 | Sagittaria latifolia Willd. | broadleaf arrowhead | Alismataceae
|
| SALO2 | Sagittaria longiloba Engelm. ex J.G. Sm. | longbarb arrowhead | Alismataceae
|
| SALOA | Sagittaria longirostra (Micheli) J.G. Sm. var. australis J.G. Sm. | Sagittaria australis | Alismataceae
|
| SALO11 | Sagittaria longirostra (Micheli) J.G. Sm. | Sagittaria latifolia | Alismataceae
|
| SALO10 | Sagittaria longirostra auct. non (Micheli) J.G. Sm. | Sagittaria australis | Alismataceae
|
| SALO12 | Sagittaria lorata (Chapman) Small | Sagittaria subulata | Alismataceae
|
| SAMA22 | Sagittaria macrocarpa J.G. Sm. | Sagittaria fasciculata | Alismataceae
|
| SAMO9 | Sagittaria mohrii J.G. Sm. | Sagittaria platyphylla | Alismataceae
|
| SAMOC2 | Sagittaria montevidensis Cham. & Schlecht. ssp. calycina (Engelm.) Bogin | Sagittaria calycina var. calycina | Alismataceae
|
| SAMOS2 | Sagittaria montevidensis Cham. & Schlecht. ssp. spongiosa (Engelm.) Bogin | Sagittaria calycina var. spongiosa | Alismataceae
|
| SAMOS3 | Sagittaria montevidensis Cham. & Schlecht. var. spongiosa (Engelm.) Boivin | Sagittaria calycina var. spongiosa | Alismataceae
|
| SAMO | Sagittaria montevidensis Cham. & Schlecht. | giant arrowhead | Alismataceae
|
| SAOB4 | Sagittaria obtusa Muhl. ex Willd., non Thunb. | Sagittaria latifolia | Alismataceae
|
| SAOR8 | Sagittaria ornithorhyncha Small | Sagittaria latifolia | Alismataceae
|
| SAPA2 | Sagittaria papillosa Buch. | nipplebract arrowhead | Alismataceae
|
| SAPL5 | Sagittaria planipes Fern. | Sagittaria latifolia | Alismataceae
|
| SAPL | Sagittaria platyphylla (Engelm.) J.G. Sm. | delta arrowhead | Alismataceae
|
| SAPU10 | Sagittaria pubescens Muhl. ex Nutt. | Sagittaria latifolia | Alismataceae
|
| SARI | Sagittaria rigida Pursh | sessilefruit arrowhead | Alismataceae
|
| SASA7 | Sagittaria sagittifolia L. | Hawaii arrowhead | Alismataceae
|
| SASA2 | Sagittaria sanfordii Greene | valley arrowhead | Alismataceae
|
| SASE9 | Sagittaria secundifolia Kral | Little River arrowhead | Alismataceae
|
| SASP10 | Sagittaria spathulata (J.G. Sm.) Buch. | Sagittaria calycina var. spongiosa | Alismataceae
|
| SAST4 | Sagittaria stagnorum Small | Sagittaria filiformis | Alismataceae
|
| SASUG2 | Sagittaria subulata (L.) Buch. var. gracillima (S. Wats.) J.G. Sm. | Sagittaria filiformis | Alismataceae
|
| SASUK | Sagittaria subulata (L.) Buch. var. kurziana (Gl�ck) Bogin | Sagittaria kurziana | Alismataceae
|
| SASUN | Sagittaria subulata (L.) Buch. var. natans (Michx.) J.G. Sm. | Sagittaria subulata | Alismataceae
|
| SASU | Sagittaria subulata (L.) Buch. | awl-leaf arrowhead | Alismataceae
|
| SATE2 | Sagittaria teres S. Wats. | slender arrowhead | Alismataceae
|
| SATR11 | Sagittaria trifolia L. | threeleaf arrowhead | Alismataceae
|
| SAVAO2 | Sagittaria variabilis Engelm. var. obtusa Engelm. | Sagittaria latifolia | Alismataceae
|
| SAVI12 | Sagittaria viscosa C. Mohr | Sagittaria latifolia | Alismataceae
|
| SAWE2 | Sagittaria weatherbiana Fern. | Sagittaria graminea var. weatherbiana | Alismataceae
|
| SAGIT | Sagittaria L. | arrowhead | Alismataceae
|
| SATR8 | Sagotia triflora (L.) Duchass. & Walp. | Desmodium triflorum | Fabaceae
|
| SADO12 | Sagraea domingensis DC. | woodland hogwood | Melastomataceae
|
| SAPO10 | Sagraea polystachya (Naud.) Triana | | Melastomataceae
|
| SAPO11 | Sagraea portoricensis (Alain) Alain | Puerto Rico hogwood | Melastomataceae
|
| SASC7 | Sagraea scabrosa (L.) Alain | sevennerve roughleaf | Melastomataceae
|
| SASC8 | Sagraea scalpta (Vent.) Naud. | threenerve roughleaf | Melastomataceae
|
| SAUM3 | Sagraea umbrosa (Sw.) DC. | white hogwood | Melastomataceae
|
| SAGRA | Sagraea DC. | hogwood | Melastomataceae
|
| SAINT | Saintpaulia Wendland | African violet | Gesneriaceae
|
| SABR12 | Sairocarpus breweri (Gray) D.A. Sutton | Brewer's snapdragon | Scrophulariaceae
|
| SACO12 | Sairocarpus cornutus (Benth.) D.A. Sutton | spurred snapdragon | Scrophulariaceae
|
| SACO13 | Sairocarpus coulterianus (Benth. ex A. DC.) D.A. Sutton | Coulter's snapdragon | Scrophulariaceae
|
| SAEL5 | Sairocarpus elmeri (Rothm.) D.A. Sutton | Elmer's snapdragon | Scrophulariaceae
|
| SAKI | Sairocarpus kingii (S. Wats.) D.A. Sutton | least snapdragon | Scrophulariaceae
|
| SAMU2 | Sairocarpus multiflorus (Pennell) D.A. Sutton | Sierra snapdragon | Scrophulariaceae
|
| SANU6 | Sairocarpus nuttallianus (Benth. ex A. DC.) D.A. Sutton | violet snapdragon | Scrophulariaceae
|
| SAPU18 | Sairocarpus pusillus (Brandeg.) D.A. Sutton | lesser snapdragon | Scrophulariaceae
|
| SASU8 | Sairocarpus subcordatus (Gray) D.A. Sutton | dimorphic snapdragon | Scrophulariaceae
|
| SAVE7 | Sairocarpus vexillocalyculatus (Kellogg) D.A. Sutton | wiry snapdragon | Scrophulariaceae
|
| SAVI8 | Sairocarpus virga (Gray) D.A. Sutton | tall snapdragon | Scrophulariaceae
|
| SAWA2 | Sairocarpus watsonii (Vasey & Rose) D.A. Sutton | Watson's snapdragon | Scrophulariaceae
|
| SAIRO | Sairocarpus D.A. Sutton | snapdragon | Scrophulariaceae
|
| SAED | Salacca edulis Reinw. | salac palm | Arecaceae
|
| SALAC5 | Salacca Reinw. | salacca | Arecaceae
|
| SACH18 | Salacia chinensis L. | | Celastraceae
|
| SALAC6 | Salacia L. | | Celastraceae
|
| SAME | Salazaria mexicana Torr. | Mexican bladdersage | Lamiaceae
|
| SALAZ | Salazaria Torr. | bladdersage | Lamiaceae
|
| SAAM10 | Salicornia ambigua Michx. | Sarcocornia perennis | Chenopodiaceae
|
| SABI | Salicornia bigelovii Torr. | dwarf saltwort | Chenopodiaceae
|
| SADE10 | Salicornia depressa Standl. | Salicornia virginica | Chenopodiaceae
|
| SAEUR | Salicornia europaea L. ssp. rubra (A. Nels.) Breitung | Salicornia rubra | Chenopodiaceae
|
| SAEUP2 | Salicornia europaea L. var. pachystachya auct. non (W.D.J. Koch) Fern. | Salicornia virginica | Chenopodiaceae
|
| SAEUP3 | Salicornia europaea L. var. prona (Lunell) Boivin | Salicornia rubra | Chenopodiaceae
|