| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| SPPU7 | Sphagnum pulchricoma C. Müll. | Sphagnum recurvum | Sphagnaceae
|
| SPPU6 | Sphagnum pulchrum (Lindb. ex Braithw.) Warnst. | sphagnum | Sphagnaceae
|
| SPPYS | Sphagnum pylaesii Brid. var. sedoides (Brid.) Lindb. in Braithw. | Sphagnum pylaesii | Sphagnaceae
|
| SPPY3 | Sphagnum pylaesii Brid. | Pylaes' sphagnum | Sphagnaceae
|
| SPQU | Sphagnum quinquefarium (Lindb. ex Braithw.) Warnst. | sphagnum | Sphagnaceae
|
| SPREA2 | Sphagnum recurvum P. Beauv. ssp. angustifolium C. Jens. ex Russ. | Sphagnum angustifolium | Sphagnaceae
|
| SPREA | Sphagnum recurvum P. Beauv. var. amblyphyllum (Russ.) Warnst. | Sphagnum flexuosum var. flexuosum | Sphagnaceae
|
| SPREB | Sphagnum recurvum P. Beauv. var. brevifolium (Lindb. ex Braithw.) Warnst. | Sphagnum fallax | Sphagnaceae
|
| SPREF | Sphagnum recurvum P. Beauv. var. fallax (Klinggr.) Paul in Koppe | Sphagnum fallax | Sphagnaceae
|
| SPREP | Sphagnum recurvum P. Beauv. var. parvifolium Sendtn. ex Warnst. | Sphagnum angustifolium | Sphagnaceae
|
| SPREP2 | Sphagnum recurvum P. Beauv. var. porosum Schlieph. & Warnst. in Warnst. | Sphagnum jensenii | Sphagnaceae
|
| SPRET | Sphagnum recurvum P. Beauv. var. tenue Klinggr. | Sphagnum angustifolium | Sphagnaceae
|
| SPRE70 | Sphagnum recurvum P. Beauv. | recurved sphagnum | Sphagnaceae
|
| SPRI70 | Sphagnum riparium Ångstr. | streamside sphagnum | Sphagnaceae
|
| SPRO3 | Sphagnum robustum (Warnst.) Röll | Sphagnum russowii | Sphagnaceae
|
| SPRU4 | Sphagnum rubellum Wils. | sphagnum | Sphagnaceae
|
| SPRU5 | Sphagnum rubroflexuosum Andrus | sphagnum | Sphagnaceae
|
| SPRU7 | Sphagnum rufescens Nees ex Nees & Hornsch. | Sphagnum lescurii | Sphagnaceae
|
| SPRU6 | Sphagnum russowii Warnst. | Russow's sphagnum | Sphagnaceae
|
| SPSC | Sphagnum schofieldii Crum | Schofield's sphagnum | Sphagnaceae
|
| SPSE3 | Sphagnum sedoides Brid. | Sphagnum pylaesii | Sphagnaceae
|
| SPSE4 | Sphagnum serratum Aust. | Sphagnum trinitense | Sphagnaceae
|
| SPSP7 | Sphagnum splendens Maass | sphagnum | Sphagnaceae
|
| SPSQ70 | Sphagnum squarrosum Crome | sphagnum | Sphagnaceae
|
| SPST70 | Sphagnum steerei Andrus | Steere's sphagnum | Sphagnaceae
|
| SPST9 | Sphagnum strictum Sull. | sphagnum | Sphagnaceae
|
| SPSU8 | Sphagnum subfulvum Sjors | Sphagnum nitidum | Sphagnaceae
|
| SPSU3 | Sphagnum subnitens Russ. & Warnst. in Warnst. | sphagnum | Sphagnaceae
|
| SPSU6 | Sphagnum subobesum Warnst. | sphagnum | Sphagnaceae
|
| SPSUA | Sphagnum subsecundum Nees in Sturm var. andrusii Crum | Andrus' sphagnum | Sphagnaceae
|
| SPSUC3 | Sphagnum subsecundum Nees in Sturm var. carolinianum (Andrus) Crum | Sphagnum carolinianum | Sphagnaceae
|
| SPSUC4 | Sphagnum subsecundum Nees in Sturm var. contortum (Schultz) Hüb. | Sphagnum contortum | Sphagnaceae
|
| SPSUI | Sphagnum subsecundum Nees in Sturm var. inundatum (Russ.) C. Jens. | Sphagnum inundatum | Sphagnaceae
|
| SPSUJ | Sphagnum subsecundum Nees in Sturm var. junsaiense (Warnst.) Crum | Sphagnum subobesum | Sphagnaceae
|
| SPSUP3 | Sphagnum subsecundum Nees in Sturm var. platyphyllum (Lindb. ex Braithw.) Card. | Sphagnum platyphyllum | Sphagnaceae
|
| SPSUR | Sphagnum subsecundum Nees in Sturm var. rufescens (Nees & Hornsch.) Hüb. | Sphagnum lescurii | Sphagnaceae
|
| SPSUS | Sphagnum subsecundum Nees in Sturm var. subsecundum | sphagnum | Sphagnaceae
|
| SPSU9 | Sphagnum subsecundum Nees in Sturm | sphagnum | Sphagnaceae
|
| SPSU7 | Sphagnum subtile (Russ.) Warnst. | sphagnum | Sphagnaceae
|
| SPTA | Sphagnum tabulare Sull. | Sphagnum molle | Sphagnaceae
|
| SPTE70 | Sphagnum tenellum (Brid.) Bory | sphagnum | Sphagnaceae
|
| SPTE11 | Sphagnum tenerum Sull. & Lesq. in Sull. in Gray | sphagnum | Sphagnaceae
|
| SPTE71 | Sphagnum teres (Schimp.) Ångstr. in Hartm. | sphagnum | Sphagnaceae
|
| SPTO6 | Sphagnum torreyanum Sull. | Torrey's sphagnum | Sphagnaceae
|
| SPTR3 | Sphagnum trinitense C. Müll. | Trinity sphagnum | Sphagnaceae
|
| SPVI4 | Sphagnum viridum Flatb. | sphagnum | Sphagnaceae
|
| SPWA | Sphagnum warnstorfianum Du Rietz | Sphagnum warnstorfii | Sphagnaceae
|
| SPWA70 | Sphagnum warnstorfii Russ. | Warnstorf's sphagnum | Sphagnaceae
|
| SPWI | Sphagnum wilfii Crum | Wilf's sphagnum | Sphagnaceae
|
| SPWU70 | Sphagnum wulfianum Girg. | Wulf's sphagnum | Sphagnaceae
|
| SPHAG2 | Sphagnum L. | sphagnum | Sphagnaceae
|
| SPZE | Sphenoclea zeylanica Gaertn. | chickenspike | Sphenocleaceae
|
| SPHEN5 | Sphenoclea Gaertn. | sphenoclea | Sphenocleaceae
|
| SPPE9 | Sphenolobopsis pearsonii (Spruce) R. M. Schust. | | Jungermanniaceae
|
| SPHEN6 | Sphenolobopsis R. M. Schust. & N. Kitag. | | Jungermanniaceae
|
| SPCH2 | Sphenomeris chinensis (L.) Maxon | Odontosoria chinensis | Dennstaedtiaceae
|
| SPCH6 | Sphenomeris chusiana (L.) Copeland | Odontosoria chinensis | Dennstaedtiaceae
|
| SPCL2 | Sphenomeris clavata (L.) Maxon | Odontosoria clavata | Dennstaedtiaceae
|
| SPFI | Sphenopholis filiformis (Chapman) Scribn. | longleaf wedgescale | Poaceae
|
| SPINP | Sphenopholis intermedia (Rydb.) Rydb. var. pilosa Dore | Sphenopholis intermedia | Poaceae
|
| SPIN3 | Sphenopholis intermedia (Rydb.) Rydb. | slender wedgescale | Poaceae
|
| SPLO | Sphenopholis longiflora (Vasey) A.S. Hitchc. | Texas wedgescale | Poaceae
|
| SPNI | Sphenopholis nitida (Biehler) Scribn. | shiny wedgescale | Poaceae
|
| SPOBL | Sphenopholis obtusata (Michx.) Scribn. var. lobata (Trin.) Scribn. | Sphenopholis obtusata | Poaceae
|
| SPOBM | Sphenopholis obtusata (Michx.) Scribn. var. major (Torr.) K.S. Erdman | Sphenopholis intermedia | Poaceae
|
| SPOBP | Sphenopholis obtusata (Michx.) Scribn. var. pubescens (Scribn. & Merr.) Scribn. | Sphenopholis obtusata | Poaceae
|
| SPOB | Sphenopholis obtusata (Michx.) Scribn. | prairie wedgescale | Poaceae
|
| SPPA7 | Sphenopholis ×pallens (Biehler) Scribn. (pro sp.) | | Poaceae
|
| SPPE3 | Sphenopholis pensylvanica (L.) A.S. Hitchc. | swamp wedgescale | Poaceae
|
| SPHEN | Sphenopholis Scribn. | wedgescale | Poaceae
|
| SPCA5 | Sphenosciadium capitellatum Gray | woollyhead parsnip | Apiaceae
|
| SPHEN2 | Sphenosciadium Gray | sphenosciadium | Apiaceae
|
| SPCO5 | Sphenostigma coelestinum (Bartr.) R.C. Foster | Calydorea coelestina | Iridaceae
|
| SPST8 | Sphenostylis stenocarpa (Hochst. ex A. Rich.) Harms | African yam bean | Fabaceae
|
| SPHEN7 | Sphenostylis E. Meyer | sphenostylis | Fabaceae
|
| SPCO3 | Sphinctospermum constrictum (S. Wats.) Rose | hourglass peaseed | Fabaceae
|
| SPHIN | Sphinctospermum Rose | sphinctospermum | Fabaceae
|
| SPAN8 | Sphinctrina anglica Nyl. | | Sphinctrinaceae
|
| SPLE4 | Sphinctrina leucopoda Nyl. | | Sphinctrinaceae
|
| SPMI7 | Sphinctrina microcephala (Sm.) Korber | Sphinctrina anglica | Sphinctrinaceae
|
| SPMI8 | Sphinctrina microcephala Nyl. | Sphinctrina tubiformis | Sphinctrinaceae
|
| SPTU2 | Sphinctrina tubiformis A. Massal. | | Sphinctrinaceae
|
| SPTU3 | Sphinctrina turbinata (Pers.:Fr.) De Not. | | Sphinctrinaceae
|
| SPHIN2 | Sphinctrina Fr. | sphinctrina | Sphinctrinaceae
|
| SPCA9 | Sphinctrinella calicioides Nadv. | Mycocalicium calicioides | Mycocaliciaceae
|
| SPLA7 | Spiesia lagopus (Nutt.) Kuntze | Oxytropis lagopus var. lagopus | Fabaceae
|
| SPOR3 | Spiesia oreophila (Gray) Kuntze | Oxytropis oreophila var. oreophila | Fabaceae
|
| SPAN4 | Spigelia anthelmia L. | West Indian pinkroot | Loganiaceae
|
| SPGEA | Spigelia gentianoides Chapman ex A. DC. var. alabamensis K. Gould | purpleflower pinkroot | Loganiaceae
|
| SPGEG | Spigelia gentianoides Chapman ex A. DC. var. gentianoides | purpleflower pinkroot | Loganiaceae
|
| SPGE | Spigelia gentianoides Chapman ex A. DC. | purpleflower pinkroot | Loganiaceae
|
| SPHE7 | Spigelia hedyotidea A. DC. | prairie pinkroot | Loganiaceae
|
| SPLI2 | Spigelia lindheimeri Gray | Spigelia hedyotidea | Loganiaceae
|
| SPLO3 | Spigelia loganioides (Torr. & Gray ex Endl. & Fenzl) A. DC. | Florida pinkroot | Loganiaceae
|
| SPMA3 | Spigelia marilandica (L.) L. | woodland pinkroot | Loganiaceae
|
| SPTE2 | Spigelia texana (Torr. & Gray) A. DC. | Spigelia loganioides | Loganiaceae
|
| SPIGE | Spigelia L. | pinkroot | Loganiaceae
|
| SPAC2 | Spilanthes acmella (L.) L. | para cress | Asteraceae
|
| SPAMR3 | Spilanthes americana (Mutis ex L. f.) Hieron. var. repens (Walt.) A.H. Moore | Acmella oppositifolia var. repens | Asteraceae
|
| SPAMS | Spilanthes americana (Mutis ex L. f.) Hieron. var. stolonifera (DC.) A.H. Moore | Acmella decumbens | Asteraceae
|
| SPAM3 | Spilanthes americana auct. p.p. non Hieron. | Acmella oppositifolia var. repens | Asteraceae
|