| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| SANI9 | Saccharodendron nigrum (Michx. f.) Small | Acer nigrum | Aceraceae
|
| SASA18 | Saccharodendron saccharum (Marsh.) Moldenke | Acer saccharum var. saccharum | Aceraceae
|
| SAAL9 | Saccharum alopecuroidum (L.) Nutt. | silver plumegrass | Poaceae
|
| SABA10 | Saccharum baldwinii Spreng. | narrow plumegrass | Poaceae
|
| SABE8 | Saccharum bengalense Retz. | Munj sweetcane | Poaceae
|
| SABRB5 | Saccharum brevibarbe (Michx.) Pers. var. brevibarbe | shortbeard plumegrass | Poaceae
|
| SABRC3 | Saccharum brevibarbe (Michx.) Pers. var. contortum (Ell.) R. Webster | sortbeard plumegrass | Poaceae
|
| SABR18 | Saccharum brevibarbe (Michx.) Pers. | shortbeard plumegrass | Poaceae
|
| SACI3 | Saccharum ciliare Anderss. | Saccharum bengalense | Poaceae
|
| SACO31 | Saccharum coarctatum (Fern.) R. Webster | compressed plumegrass | Poaceae
|
| SACO26 | Saccharum contortum (Ell.) Nutt. | Saccharum brevibarbe var. contortum | Poaceae
|
| SACO18 | Saccharum contractum Kunth | Imperata contracta | Poaceae
|
| SAGI | Saccharum giganteum (Walt.) Pers. | sugarcane plumegrass | Poaceae
|
| SAOF | Saccharum officinarum L. | sugarcane | Poaceae
|
| SAPA26 | Saccharum pappiferum Lam. | Pappophorum pappiferum | Poaceae
|
| SARA3 | Saccharum ravennae (L.) L. | ravennagrass | Poaceae
|
| SARE13 | Saccharum repens Willd. | Melinis repens | Poaceae
|
| SARO11 | Saccharum robustum Brandes & Jesw. ex Grassl | robust cane | Poaceae
|
| SASA14 | Saccharum sagittatum Aubl. | Gynerium sagittatum | Poaceae
|
| SASP | Saccharum spontaneum L. | wild sugarcane | Poaceae
|
| SAST7 | Saccharum strictum (Ell.) Ell. ex Nutt. | Saccharum baldwinii | Poaceae
|
| SACCH | Saccharum L. | sugarcane | Poaceae
|
| SAIN | Sacciolepis indica (L.) Chase | glenwoodgrass | Poaceae
|
| SAST | Sacciolepis striata (L.) Nash | American cupscale | Poaceae
|
| SACCI | Sacciolepis Nash | cupscale grass | Poaceae
|
| SADO6 | Saccoloma domingense (Spreng.) C. Christens. | Caribbean soralpouch fern | Dennstaedtiaceae
|
| SAIN5 | Saccoloma inaequale (Kunze) Mett. | forest soralpouch fern | Dennstaedtiaceae
|
| SACCO | Saccoloma Kaulfuss | soralpouch fern | Dennstaedtiaceae
|
| SAHY3 | Saccomorpha hyporhoda (Th. Fr.) Clauzade & Roux | Placynthiella hyporhoda | Trapeliaceae
|
| SAIC | Saccomorpha icmalea (Ach.) Clauzade & Roux | Placynthiella icmalea | Trapeliaceae
|
| SAOL4 | Saccomorpha oligotropha (J. R. Laundon) Clauzade & Roux | Placynthiella oligotropha | Trapeliaceae
|
| SAUL | Saccomorpha uliginosa (Schrader) Hafellner | Placynthiella uliginosa | Trapeliaceae
|
| SABA9 | Sachsia bahamensis Urban | Sachsia polycephala | Asteraceae
|
| SAPO3 | Sachsia polycephala Griseb. | Bahama sachsia | Asteraceae
|
| SACHS | Sachsia Griseb. | sachsia | Asteraceae
|
| SALAP2 | Sacoila lanceolata (Aubl.) Garay var. paludicola (Luer) Sauleda, Wunderlin & B.F. Hansen | Stenorrhynchos lanceolatum var. paludicola | Orchidaceae
|
| SALA13 | Sacoila lanceolata (Aubl.) Garay | Stenorrhynchos lanceolatum var. lanceolatum | Orchidaceae
|
| SACY3 | Sadleria cyatheoides Kaulfuss | amaumau fern | Blechnaceae
|
| SAHI4 | Sadleria hillebrandii W.J. Robins. | Sadleria pallida | Blechnaceae
|
| SAPA11 | Sadleria pallida Hook. & Arn. | ama'u | Blechnaceae
|
| SAPO6 | Sadleria polystichoides (Brack.) Heller | Sadleria squarrosa | Blechnaceae
|
| SASO2 | Sadleria souleyetiana (Gaud.) T. Moore | longleaf plume fern | Blechnaceae
|
| SASQ | Sadleria squarrosa (Gaud.) T. Moore | forest plume fern | Blechnaceae
|
| SAUN2 | Sadleria unisora (Baker) W.J. Robins. | Sadleria squarrosa | Blechnaceae
|
| SADLE | Sadleria Kaulfuss | sadleria | Blechnaceae
|
| SAGL70 | Saelania glaucescens (Hedw.) Broth. in Bomanss. & Broth. | saelania moss | Ditrichaceae
|
| SAELA2 | Saelania Lindb. | saelania moss | Ditrichaceae
|
| SABA16 | Sagediopsis barbara (Th. Fr.) R. Sant. & Triebel | | Adelococcaceae
|
| SACA47 | Sagediopsis campsteriana (Linds.) D. Hawksw. & R. Sant. | | Adelococcaceae
|
| SAGED | Sagediopsis (Sacc.) Vainio | sagediopsis | Adelococcaceae
|
| SAMI10 | Sageretia minutiflora (Michx.) C. Mohr | smallflower mock buckthorn | Rhamnaceae
|
| SATH5 | Sageretia thea (Osbeck) M.C. Johnston | pauper's-tea | Rhamnaceae
|
| SAWR | Sageretia wrightii S. Wats. | Wright's mock buckthorn | Rhamnaceae
|
| SAGER | Sageretia Brongn. | mock buckthorn | Rhamnaceae
|
| SAAPB | Sagina apetala Ard. var. barbata Fenzl | Sagina apetala | Caryophyllaceae
|
| SAAP | Sagina apetala Ard. | annual pearlwort | Caryophyllaceae
|
| SACRL | Sagina crassicaulis S. Wats. var. littoralis (Hult�n) Hult�n | Sagina maxima ssp. maxima | Caryophyllaceae
|
| SACR9 | Sagina crassicaulis S. Wats. | Sagina maxima ssp. crassicaulis | Caryophyllaceae
|
| SADED | Sagina decumbens (Ell.) Torr. & Gray ssp. decumbens | trailing pearlwort | Caryophyllaceae
|
| SADEO | Sagina decumbens (Ell.) Torr. & Gray ssp. occidentalis (S. Wats.) Crow | western pearlwort | Caryophyllaceae
|
| SADES | Sagina decumbens (Ell.) Torr. & Gray var. smithii (Gray) S. Wats. | Sagina decumbens ssp. decumbens | Caryophyllaceae
|
| SADE | Sagina decumbens (Ell.) Torr. & Gray | trailing pearlwort | Caryophyllaceae
|
| SAFO6 | Sagina fontinalis Short & Peter | Stellaria fontinalis | Caryophyllaceae
|
| SAHA4 | Sagina hawaiensis Pax | Sagina subulata | Caryophyllaceae
|
| SAIN9 | Sagina intermedia Fenzl | Sagina nivalis | Caryophyllaceae
|
| SAJA2 | Sagina japonica (Sw.) Ohwi | Japanese pearlwort | Caryophyllaceae
|
| SALI6 | Sagina linnaei K. Presl | Sagina saginoides | Caryophyllaceae
|
| SALI5 | Sagina littoralis Hult�n | Sagina maxima ssp. maxima | Caryophyllaceae
|
| SAMAC | Sagina maxima Gray ssp. crassicaulis (S. Wats.) Crow | stickystem pearlwort | Caryophyllaceae
|
| SAMAM | Sagina maxima Gray ssp. maxima | stickystem pearlwort | Caryophyllaceae
|
| SAMAL2 | Sagina maxima Gray var. littorea (Mackenzie) Hara | Sagina maxima ssp. maxima | Caryophyllaceae
|
| SAMA6 | Sagina maxima Gray | stickystem pearlwort | Caryophyllaceae
|
| SAMI16 | Sagina micrantha (Bunge) Fern. | Sagina saginoides | Caryophyllaceae
|
| SANI7 | Sagina nivalis (Lindbl.) Fries | snow pearlwort | Caryophyllaceae
|
| SANOB | Sagina nodosa (L.) Fenzl ssp. borealis Crow | knotted pearlwort | Caryophyllaceae
|
| SANON | Sagina nodosa (L.) Fenzl ssp. nodosa | knotted pearlwort | Caryophyllaceae
|
| SANOB2 | Sagina nodosa (L.) Fenzl var. borealis (Crow) Cronq. | Sagina nodosa ssp. borealis | Caryophyllaceae
|
| SANOG | Sagina nodosa (L.) Fenzl var. glandulosa (Bess.) Aschers. | Sagina nodosa ssp. nodosa | Caryophyllaceae
|
| SANOP3 | Sagina nodosa (L.) Fenzl var. pubescens (Bess.) Mert. & Koch | Sagina nodosa ssp. nodosa | Caryophyllaceae
|
| SANO | Sagina nodosa (L.) Fenzl | knotted pearlwort | Caryophyllaceae
|
| SAOC6 | Sagina occidentalis S. Wats. | Sagina decumbens ssp. occidentalis | Caryophyllaceae
|
| SAPRC | Sagina procumbens L. var. compacta Lange | Sagina procumbens | Caryophyllaceae
|
| SAPR | Sagina procumbens L. | birdeye pearlwort | Caryophyllaceae
|
| SASAH | Sagina saginoides (L.) Karst. var. hesperia Fern. | Sagina saginoides | Caryophyllaceae
|
| SASA | Sagina saginoides (L.) Karst. | arctic pearlwort | Caryophyllaceae
|
| SASU5 | Sagina subulata (Sw.) K. Presl | awl-leaf pearlwort | Caryophyllaceae
|
| SAVI9 | Sagina virginica L. | Bartonia virginica | Gentianaceae
|
| SAGIN | Sagina L. | pearlwort | Caryophyllaceae
|
| SAPR12 | Sagiolechia protuberans (Ach.) A. Massal. | | Gomphillaceae
|
| SARH4 | Sagiolechia rhexoblephara (Nyl.) Zahlbr. | | Gomphillaceae
|
| SAGIO | Sagiolechia A. Massal. | sagiolechia | Gomphillaceae
|
| SAAM4 | Sagittaria ambigua J.G. Sm. | Kansas arrowhead | Alismataceae
|
| SAAN10 | Sagittaria angustifolia Lindl. | Sagittaria lancifolia ssp. lancifolia | Alismataceae
|
| SAAR26 | Sagittaria arifolia Nutt. ex J.G. Sm. | Sagittaria cuneata | Alismataceae
|
| SAAU2 | Sagittaria australis (J.G. Sm.) Small | longbeak arrowhead | Alismataceae
|
| SABR8 | Sagittaria brevirostra Mackenzie & Bush | shortbeak arrowhead | Alismataceae
|
| SACAC | Sagittaria calycina Engelm. var. calycina | hooded arrowhead | Alismataceae
|
| SACAS | Sagittaria calycina Engelm. var. spongiosa Engelm. | hooded arrowhead | Alismataceae
|
| SACA21 | Sagittaria calycina Engelm. | hooded arrowhead | Alismataceae
|
| SACH14 | Sagittaria chapmanii (J.G. Sm.) C. Mohr | Sagittaria graminea var. chapmanii | Alismataceae
|
| SACH15 | Sagittaria chinensis Pursh | Sagittaria latifolia | Alismataceae
|