| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| SPOL3 | Spilanthes oleracea L. | spilanthes | Asteraceae
|
| SPPU5 | Spilanthes pusilla Hook. & Arn. | Acmella pusilla | Asteraceae
|
| SPST4 | Spilanthes stolonifera DC. | Acmella decumbens | Asteraceae
|
| SPUR | Spilanthes urens Jacq. | pigeoncoop | Asteraceae
|
| SPILA | Spilanthes Jacq. | spilanthes | Asteraceae
|
| SPDE4 | Spilonema dendroides Henssen | | Coccocarpiaceae
|
| SPPA10 | Spilonema paradoxum Bornet | | Coccocarpiaceae
|
| SPRE2 | Spilonema revertens Nyl. | | Coccocarpiaceae
|
| SPILO | Spilonema Bornet | spilonema | Coccocarpiaceae
|
| SPOL | Spinacia oleracea L. | spinach | Chenopodiaceae
|
| SPINA | Spinacia L. | spinach | Chenopodiaceae
|
| SPCO9 | Spiracantha cornifolia Kunth | dogwoodleaf | Asteraceae
|
| SPIRA3 | Spiracantha Kunth | dogwoodleaf | Asteraceae
|
| SPALA | Spiraea alba Du Roi var. alba | white meadowsweet | Rosaceae
|
| SPALL | Spiraea alba Du Roi var. latifolia (Ait.) Dippel | white meadowsweet | Rosaceae
|
| SPALS | Spiraea alba Du Roi var. septentrionalis (Fern.) Seymour | Spiraea septentrionalis | Rosaceae
|
| SPAL2 | Spiraea alba Du Roi | white meadowsweet | Rosaceae
|
| SPAR5 | Spiraea arbuscula Greene | Spiraea splendens var. rosea | Rosaceae
|
| SPAR4 | Spiraea aruncus L. | Aruncus dioicus var. vulgaris | Rosaceae
|
| SPBES | Spiraea beauverdiana Schneid. var. stevenii Schneid. | Spiraea stevenii | Rosaceae
|
| SPBE | Spiraea beauverdiana auct. non Schneid. | Spiraea stevenii | Rosaceae
|
| SPBEC2 | Spiraea betulifolia Pallas ssp. corymbosa (Raf.) Taylor & MacBryde | Spiraea betulifolia var. corymbosa | Rosaceae
|
| SPBEL2 | Spiraea betulifolia Pallas ssp. lucida (Dougl. ex Greene) Taylor & MacBryde | Spiraea betulifolia var. lucida | Rosaceae
|
| SPBEC | Spiraea betulifolia Pallas var. corymbosa (Raf.) Maxim. | shinyleaf meadowsweet | Rosaceae
|
| SPBEL | Spiraea betulifolia Pallas var. lucida (Dougl. ex Greene) C.L. Hitchc. | shinyleaf spirea | Rosaceae
|
| SPBER | Spiraea betulifolia Pallas var. rosea Gray | Spiraea splendens var. rosea | Rosaceae
|
| SPBE2 | Spiraea betulifolia Pallas | white spirea | Rosaceae
|
| SPBI2 | Spiraea �billiardii Herincq. (pro sp.) | | Rosaceae
|
| SPBU2 | Spiraea �bumalda Burven | Japanese spiraea | Rosaceae
|
| SPCA13 | Spiraea caespitosa Nutt. | Petrophyton caespitosum var. caespitosum | Rosaceae
|
| SPCA15 | Spiraea californica Torr. | Vauquelinia californica ssp. californica | Rosaceae
|
| SPCA10 | Spiraea cantoniensis Lour. | Reeves' meadowsweet | Rosaceae
|
| SPCHC | Spiraea chamaedryfolia L. var. chamaedryfolia | Germander meadowsweet | Rosaceae
|
| SPCHU | Spiraea chamaedryfolia L. var. ulmifolia (Scop.) Maxim. | Germander meadowsweet | Rosaceae
|
| SPCH3 | Spiraea chamaedryfolia L. | Germander meadowsweet | Rosaceae
|
| SPCO12 | Spiraea corymbosa Raf. | Spiraea betulifolia var. corymbosa | Rosaceae
|
| SPDES2 | Spiraea densiflora Nutt. ex Greenm. ssp. splendens (Baumann ex K. Koch) Abrams | Spiraea splendens var. splendens | Rosaceae
|
| SPDES | Spiraea densiflora Nutt. ex Greenm. var. splendens (Baumann ex K. Koch) C.L. Hitchc. | Spiraea splendens var. splendens | Rosaceae
|
| SPDE | Spiraea densiflora Nutt. ex Greenm. | Spiraea splendens var. splendens | Rosaceae
|
| SPDI7 | Spiraea discolor Pursh | Holodiscus discolor | Rosaceae
|
| SPDOM2 | Spiraea douglasii Hook. ssp. menziesii (Hook.) Calder & Taylor | Spiraea douglasii var. menziesii | Rosaceae
|
| SPDOD | Spiraea douglasii Hook. var. douglasii | rose spirea | Rosaceae
|
| SPDOM | Spiraea douglasii Hook. var. menziesii (Hook.) K. Presl | Menzies' spirea | Rosaceae
|
| SPDOR | Spiraea douglasii Hook. var. roseata (Rydb.) C.L. Hitchc. | Spiraea douglasii var. douglasii | Rosaceae
|
| SPDO | Spiraea douglasii Hook. | rose spirea | Rosaceae
|
| SPFL9 | Spiraea flexuosa Fisch. ex Cambess. | | Rosaceae
|
| SPHE3 | Spiraea hendersonii (Canby) Piper | Petrophyton hendersonii | Rosaceae
|
| SPHY2 | Spiraea hypericifolia L. | Iberian spirea | Rosaceae
|
| SPJAF | Spiraea japonica L. f. var. fortunei (Planch.) Rehd. | fortune meadowsweet | Rosaceae
|
| SPJA | Spiraea japonica L. f. | Japanese meadowsweet | Rosaceae
|
| SPLAS | Spiraea latifolia (Ait.) Borkh. var. septentrionalis Fern. | Spiraea septentrionalis | Rosaceae
|
| SPLA2 | Spiraea latifolia (Ait.) Borkh. | Spiraea alba var. latifolia | Rosaceae
|
| SPLU5 | Spiraea lucida Dougl. ex Greene | Spiraea betulifolia var. lucida | Rosaceae
|
| SPME2 | Spiraea menziesii Hook. | Spiraea douglasii var. menziesii | Rosaceae
|
| SPOP | Spiraea opulifolia L. | Physocarpus opulifolius var. opulifolius | Rosaceae
|
| SPPRP | Spiraea prunifolia Sieb. & Zucc. var. plena Schneid. | Spiraea prunifolia | Rosaceae
|
| SPPR | Spiraea prunifolia Sieb. & Zucc. | bridalwreath spirea | Rosaceae
|
| SPPY | Spiraea �pyramidata Greene (pro sp.) | | Rosaceae
|
| SPSA2 | Spiraea salicifolia L. | willowleaf meadowsweet | Rosaceae
|
| SPSA8 | Spiraea sargentiana Rehder | | Rosaceae
|
| SPSE | Spiraea septentrionalis (Fern.) A.& D. L�ve | northern meadowsweet | Rosaceae
|
| SPSO | Spiraea sorbifolia L. | Sorbaria sorbifolia | Rosaceae
|
| SPSPR | Spiraea splendens Baumann ex K. Koch var. rosea (Gray) Kartesz & Gandhi | rose meadowsweet | Rosaceae
|
| SPSPS | Spiraea splendens Baumann ex K. Koch var. splendens | rose meadowsweet | Rosaceae
|
| SPSP2 | Spiraea splendens Baumann ex K. Koch | rose meadowsweet | Rosaceae
|
| SPST3 | Spiraea stevenii (Schneid.) Rydb. | beauverd spirea | Rosaceae
|
| SPSU2 | Spiraea �subcanescens Rydb. (pro sp.) | | Rosaceae
|
| SPSU4 | Spiraea subvillosa Rydb. | Spiraea douglasii var. menziesii | Rosaceae
|
| SPTH2 | Spiraea thunbergii Sieb. ex Blume | Thunberg's meadowsweet | Rosaceae
|
| SPTOR | Spiraea tomentosa L. var. rosea (Raf.) Fern. | steeplebush | Rosaceae
|
| SPTOT | Spiraea tomentosa L. var. tomentosa | steeplebush | Rosaceae
|
| SPTO2 | Spiraea tomentosa L. | steeplebush | Rosaceae
|
| SPTO4 | Spiraea tomentulosa Rydb. | Spiraea pyramidata | Rosaceae
|
| SPTR2 | Spiraea trilobata L. | Asian meadowsweet | Rosaceae
|
| SPUL2 | Spiraea ulmaria L. | Filipendula ulmaria ssp. ulmaria | Rosaceae
|
| SPVA2 | Spiraea �vanhouttei (Briot) Carr. | | Rosaceae
|
| SPVIS | Spiraea virginiana Britt. var. serrulata Rehd. | Spiraea virginiana | Rosaceae
|
| SPVI2 | Spiraea virginiana Britt. | Virginia meadowsweet | Rosaceae
|
| SPIRA | Spiraea L. | spirea | Rosaceae
|
| SPAD | Spiranthes adnata (Sw.) Benth. ex Fawcett | Pelexia adnata | Orchidaceae
|
| SPAM4 | Spiranthes amabilis Ames | Hapalorchis lineatus | Orchidaceae
|
| SPBE3 | Spiranthes beckii Lindl. | Spiranthes lacera var. gracilis | Orchidaceae
|
| SPBRB | Spiranthes brevilabris Lindl. var. brevilabris | Texas ladies'-tresses | Orchidaceae
|
| SPBRF | Spiranthes brevilabris Lindl. var. floridana (Wherry) Luer | Florida ladies'-tresses | Orchidaceae
|
| SPBR | Spiranthes brevilabris Lindl. | Texas ladies'-tresses | Orchidaceae
|
| SPCA6 | Spiranthes casei Catling & Cruise | Case's ladies'-tresses | Orchidaceae
|
| SPCEI | Spiranthes cernua (L.) L.C. Rich. var. incurva Jennings | Spiranthes cernua | Orchidaceae
|
| SPCEO | Spiranthes cernua (L.) L.C. Rich. var. ochroleuca (Rydb.) Ames | Spiranthes ochroleuca | Orchidaceae
|
| SPCEO2 | Spiranthes cernua (L.) L.C. Rich. var. odorata (Nutt.) Correll | Spiranthes odorata | Orchidaceae
|
| SPCE | Spiranthes cernua (L.) L.C. Rich. | nodding ladies'-tresses | Orchidaceae
|
| SPCI | Spiranthes cinnabarina (Llave & Lex.) Hemsl. | scarlet ladies'-tresses | Orchidaceae
|
| SPCO15 | Spiranthes confusa (Garay) Kartesz & Gandhi | confused ladies'-tresses | Orchidaceae
|
| SPCO6 | Spiranthes costaricensis Reichenb. f. | Costa Rican ladies'-tresses | Orchidaceae
|
| SPCR2 | Spiranthes cranichoides (Griseb.) Cogn. | Cyclopogon cranichoides | Orchidaceae
|
| SPDE6 | Spiranthes delitescens Sheviak | delighteful ladies'-tresses | Orchidaceae
|
| SPDI6 | Spiranthes diluvialis Sheviak | diluvim ladies'-tresses | Orchidaceae
|
| SPDU | Spiranthes durangensis Ames & C. Schweinf. | Spiranthes confusa | Orchidaceae
|
| SPEL2 | Spiranthes elata (Sw.) L.C. Rich. | Cyclopogon elatus | Orchidaceae
|
| SPFA | Spiranthes fawcettii Cogn. | Hapalorchis lineatus | Orchidaceae
|
| SPGRB | Spiranthes gracilis (Bigelow) Beck var. brevilabris (Lindl.) Correll | Spiranthes brevilabris var. brevilabris | Orchidaceae
|
| SPGRF | Spiranthes gracilis (Bigelow) Beck var. floridana (Wherry) Correll | Spiranthes brevilabris var. floridana | Orchidaceae
|