| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| SONET | Solanum nelsonii Dunal var. thomasiifolium Seem. | Solanum nelsonii | Solanaceae
|
| SONE2 | Solanum nelsonii Dunal | Nelson's horsenettle | Solanaceae
|
| SONI3 | Solanum nigrescens Mart. & Gal. | divine nightshade | Solanaceae
|
| SONIA | Solanum nigrum L. var. americanum (P. Mill.) O.E. Schulz | Solanum americanum | Solanaceae
|
| SONID2 | Solanum nigrum L. var. douglasii (Dunal) Gray | Solanum douglasii | Solanaceae
|
| SONIV4 | Solanum nigrum L. var. villosum L. | Solanum villosum | Solanaceae
|
| SONIV3 | Solanum nigrum L. var. virginicum L. | Solanum americanum | Solanaceae
|
| SONI | Solanum nigrum L. | black nightshade | Solanaceae
|
| SONI4 | Solanum nigrum auct. non L. | Solanum ptychanthum | Solanaceae
|
| SONO3 | Solanum nodiflorum Jacq. | Solanum americanum | Solanaceae
|
| SONU4 | Solanum nudum Kunth ex Dunal | forest nightshade | Solanaceae
|
| SOOT | Solanum ottonis auct. non Hyl. | Solanum chenopodioides | Solanaceae
|
| SOOT | Solanum ottonis auct. non Hyl. | Solanum gracilius | Solanaceae
|
| SOPA | Solanum parishii Heller | Parish's nightshade | Solanaceae
|
| SOPE8 | Solanum perplexum Small | Solanum dimidiatum | Solanaceae
|
| SOPE2 | Solanum persicifolium Dunal | berengena de playa | Solanaceae
|
| SOPE9 | Solanum peruvianum L. | Peruvian nightshade | Solanaceae
|
| SOPH2 | Solanum phureja Juz. & Buk. | nightshade | Solanaceae
|
| SOPHN | Solanum physalifolium Rusby var. nitidibaccatum (Bitter) Edmonds | Solanum physalifolium | Solanaceae
|
| SOPH | Solanum physalifolium Rusby | hoe nightshade | Solanaceae
|
| SOPI7 | Solanum pimpinellifolium Jusl. | currant tomato | Solanaceae
|
| SOPI2 | Solanum pinnatisectum Dunal | tansyleaf nightshade | Solanaceae
|
| SOPO | Solanum polygamum Vahl | cakalaka berry | Solanaceae
|
| SOPS | Solanum pseudocapsicum L. | Jerusalem cherry | Solanaceae
|
| SOPS2 | Solanum pseudogracile Heiser | glowing nightshade | Solanaceae
|
| SOPT3 | Solanum ptychanthum Dunal | West Indian nightshade | Solanaceae
|
| SOPU2 | Solanum puberulum Nutt. ex Seem. | Solanum viride | Solanaceae
|
| SOPY | Solanum pyrifolium Lam. | | Solanaceae
|
| SOQU | Solanum quitoense Lam. | naranjilla | Solanaceae
|
| SORA2 | Solanum racemosum Jacq. | canker berry | Solanaceae
|
| SORA7 | Solanum rantonnettii Carriere ex Lescuy. | Lycianthes rantonnettii | Solanaceae
|
| SORI3 | Solanum riedlei Dunal | Riedle's nightshade | Solanaceae
|
| SORO3 | Solanum robustum Wendl. | shrubby nightshade | Solanaceae
|
| SORO | Solanum rostratum Dunal | buffalobur nightshade | Solanaceae
|
| SORU4 | Solanum rubrum auct. non L. | Solanum nigrum | Solanaceae
|
| SORU | Solanum rugosum Dunal | tabacon aspero | Solanaceae
|
| SOSA4 | Solanum sandwicense Hook. & Arn. | Hawai'i horsenettle | Solanaceae
|
| SOSA8 | Solanum sarrachoides auct. non Sendtner | Solanum physalifolium | Solanaceae
|
| SOSE7 | Solanum seaforthianum Andr. | Brazilian nightshade | Solanaceae
|
| SOSE11 | Solanum sessiliflorum Dunal | cocona | Solanaceae
|
| SOSI | Solanum sisymbriifolium Lam. | sticky nightshade | Solanaceae
|
| SOSO4 | Solanum sodomeum auct. non L. | Solanum americanum | Solanaceae
|
| SOSU3 | Solanum sublobatum auct. non Willd. ex Roemer & J.A. Schultes | Solanum gracilius | Solanaceae
|
| SOSU6 | Solanum surattense Burm. | | Solanaceae
|
| SOTA3 | Solanum tampicense Dunal | scrambling nightshade | Solanaceae
|
| SOTE | Solanum tenuilobatum Parish | San Diego nightshade | Solanaceae
|
| SOTEL | Solanum tenuipes Bartlett var. latisectum M.D. Whalen | fancy nightshade | Solanaceae
|
| SOTET | Solanum tenuipes Bartlett var. tenuipes | fancy nightshade | Solanaceae
|
| SOTE4 | Solanum tenuipes Bartlett | fancy nightshade | Solanaceae
|
| SOTO6 | Solanum topiro Humb. & Bonpl. ex Dunal | Solanum sessiliflorum | Solanaceae
|
| SOTO5 | Solanum torreyi Gray | Solanum dimidiatum | Solanaceae
|
| SOTO4 | Solanum torvum Sw. | turkey berry | Solanaceae
|
| SOTR | Solanum triflorum Nutt. | cutleaf nightshade | Solanaceae
|
| SOTR2 | Solanum triquetrum Cav. | Texas nightshade | Solanaceae
|
| SOTU | Solanum tuberosum L. | Irish potato | Solanaceae
|
| SOUMG | Solanum umbelliferum Eschsch. var. glabrescens Torr. | bluewitch | Solanaceae
|
| SOUMI | Solanum umbelliferum Eschsch. var. incanum Torr. | bluewitch | Solanaceae
|
| SOUMU | Solanum umbelliferum Eschsch. var. umbelliferum | bluewitch nightshade | Solanaceae
|
| SOUM | Solanum umbelliferum Eschsch. | bluewitch nightshade | Solanaceae
|
| SOVE5 | Solanum verbascifolium auct. non L. | Solanum erianthum | Solanaceae
|
| SOVE4 | Solanum verbascifolium sensu L. | Solanum donianum | Solanaceae
|
| SOVI2 | Solanum viarum Dunal | tropical soda apple | Solanaceae
|
| SOVI8 | Solanum villosum (L.) P. Mill. | | Solanaceae
|
| SOVI6 | Solanum villosum auct. non (L.) P. Mill. | Solanum physalifolium | Solanaceae
|
| SOVI3 | Solanum viride G. Forst. ex Spreng. | green nightshade | Solanaceae
|
| SOWAC2 | Solanum wallacei (Gray) Parish ssp. clokeyi (Munz) Thorne | Solanum clokeyi | Solanaceae
|
| SOWAC | Solanum wallacei (Gray) Parish var. clokeyi (Munz) McMinn | Solanum clokeyi | Solanaceae
|
| SOWA | Solanum wallacei (Gray) Parish | Catalina nightshade | Solanaceae
|
| SOWE | Solanum wendlandii Hook. f. | giant potatocreeper | Solanaceae
|
| SOWO | Solanum woodburyi Howard | Woodbury's nightshade | Solanaceae
|
| SOXAG | Solanum xanti Gray var. glabrescens Parish | chaparral nightshade | Solanaceae
|
| SOXAH | Solanum xanti Gray var. hoffmannii Munz | Hoffmann's nightshade | Solanaceae
|
| SOXAI | Solanum xanti Gray var. intermedium Parish | chaparral nightshade | Solanaceae
|
| SOXAM | Solanum xanti Gray var. montanum Munz | chaparral nightshade | Solanaceae
|
| SOXAO | Solanum xanti Gray var. obispoense (Eastw.) Wiggins | San Luis Obispo nightshade | Solanaceae
|
| SOXAX | Solanum xanti Gray var. xanti | chaparral nightshade | Solanaceae
|
| SOXA | Solanum xanti Gray | chaparral nightshade | Solanaceae
|
| SOLAN | Solanum L. | nightshade | Solanaceae
|
| SOSO | Soleirolia soleirolii (Req.) Dandy | mother of thousands | Urticaceae
|
| SOLEI | Soleirolia Gaud. | soleirolia | Urticaceae
|
| SOCA16 | Solenospora candicans (Dickson) J. Steiner | | Bacidiaceae
|
| SOCR2 | Solenospora crenata (Herre) Zahlbr. | | Bacidiaceae
|
| SOHA7 | Solenospora hassei (Zahlbr.) Zahlbr. | Lecania hassei | Bacidiaceae
|
| SOHO3 | Solenospora holophaea (Mont.) G. Sampaio | | Bacidiaceae
|
| SOLEN | Solenospora A. Massal. | solenospora | Bacidiaceae
|
| SORO5 | Solenostemon rotundifolius (Poiret) J. K. Morton | hausa potato | Lamiaceae
|
| SOLEN2 | Solenostemon Thonn. | solenostemon | Lamiaceae
|
| SOAE | Solidago aestivalis Bickn. | Solidago rugosa ssp. rugosa var. sphagnophila | Asteraceae
|
| SOAL3 | Solidago albopilosa E.L. Braun | whitehair goldenrod | Asteraceae
|
| SOAL5 | Solidago altiplanities C.& J. Taylor | high plains goldenrod | Asteraceae
|
| SOALC | Solidago altissima L. var. canescens (Gray) M.C. Johnston | Solidago juliae | Asteraceae
|
| SOALG | Solidago altissima L. var. gilvocanescens (Rydb.) Semple | Solidago canadensis var. gilvocanescens | Asteraceae
|
| SOALP | Solidago altissima L. var. pluricephala M.C. Johnston | Solidago canadensis var. scabra | Asteraceae
|
| SOALP2 | Solidago altissima L. var. procera (Ait.) Fern. | Solidago canadensis var. scabra | Asteraceae
|
| SOAL6 | Solidago altissima L. | Solidago canadensis var. scabra | Asteraceae
|
| SOAM5 | Solidago amplexicaulis Torr. & Gray ex Gray, non Martens | Solidago auriculata | Asteraceae
|
| SOAN | Solidago angusta Torr. & Gray | Solidago petiolaris var. angusta | Asteraceae
|
| SOAN4 | Solidago angustifolia Ell. | Solidago sempervirens var. mexicana | Asteraceae
|
| SOAN5 | Solidago anticostensis Fern. | Solidago multiradiata var. multiradiata | Asteraceae
|
| SOARB2 | Solidago arguta Ait. ssp. boottii (Hook.) G. Morton | Solidago arguta var. boottii | Asteraceae
|
| SOARC2 | Solidago arguta Ait. ssp. caroliniana (Gray) G. Morton | Solidago arguta var. caroliniana | Asteraceae
|