| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| STSE4 | Stenogyne serpens Hbd. | Stenogyne kamehamehae | Lamiaceae
|
| STSEH | Stenogyne sessilis Benth. var. hexantha Sherff | Stenogyne sessilis | Lamiaceae
|
| STSEH2 | Stenogyne sessilis Benth. var. hexanthoides O. Deg. & Sherff | Stenogyne rotundifolia | Lamiaceae
|
| STSEL | Stenogyne sessilis Benth. var. lanaiensis Sherff | Stenogyne sessilis | Lamiaceae
|
| STSEW | Stenogyne sessilis Benth. var. wilkesii Sherff | Stenogyne sessilis | Lamiaceae
|
| STSE5 | Stenogyne sessilis Benth. | fuzzyflower stenogyne | Lamiaceae
|
| STSH | Stenogyne sherffii O. Deg. | Stenogyne kaalae | Lamiaceae
|
| STSO | Stenogyne sororia Sherff | Stenogyne scrophularioides | Lamiaceae
|
| STVA2 | Stenogyne vagans Hbd. | Stenogyne microphylla | Lamiaceae
|
| STVI7 | Stenogyne viridis Hbd. | Kaanapali stenogyne | Lamiaceae
|
| STENO | Stenogyne Benth. | stenogyne | Lamiaceae
|
| STCA16 | Stenolobium caeruleum Benth. | Calopogonium caeruleum | Fabaceae
|
| STST19 | Stenolobium stans (L.) Seem. | Tecoma stans | Bignoniaceae
|
| STVA6 | Stenomesson variegatum (Ruiz & Pav.) J.F. Macbr. | | Liliaceae
|
| STENO11 | Stenomesson Herb. | stenomesson | Liliaceae
|
| STBA5 | Stenophyllus barbatus (Rottb.) Britt. | Bulbostylis barbata | Cyperaceae
|
| STCA17 | Stenophyllus capillaris (L.) Britt. | Bulbostylis capillaris ssp. capillaris | Cyperaceae
|
| STCA15 | Stenophyllus carteri Britt. ex Small | Bulbostylis ciliatifolia var. coarctata | Cyperaceae
|
| STCI6 | Stenophyllus ciliatifolius (Ell.) C. Mohr | Bulbostylis ciliatifolia var. ciliatifolia | Cyperaceae
|
| STCO16 | Stenophyllus coarctatus (Ell.) Britt. | Bulbostylis ciliatifolia var. coarctata | Cyperaceae
|
| STCU7 | Stenophyllus curassavicus Britt. | Bulbostylis curassavica | Cyperaceae
|
| STPO6 | Stenophyllus portoricensis Britt. | Bulbostylis pauciflora | Cyperaceae
|
| STST7 | Stenophyllus stenophyllus (Ell.) Britt. | Bulbostylis stenophylla | Cyperaceae
|
| STWA2 | Stenophyllus warei (Torr.) Britt. | Bulbostylis warei | Cyperaceae
|
| STLAL5 | Stenorrhynchos lanceolatum (Aubl.) L.C. Rich. var. lanceolatum | leafless beaked ladies'-tresses | Orchidaceae
|
| STLAP2 | Stenorrhynchos lanceolatum (Aubl.) L.C. Rich. var. paludicola (Luer) Kartesz | leafless beaked ladies'-tresses | Orchidaceae
|
| STLA11 | Stenorrhynchos lanceolatum (Aubl.) L.C. Rich. | leafless beaked ladies'-tresses | Orchidaceae
|
| STMI5 | Stenorrhynchos michuacanus (Llave & Lex.) Schlechter | Michuacan ladies'-tresses | Orchidaceae
|
| STOR3 | Stenorrhynchos orchioides (Sw.) Lindl. | Stenorrhynchos lanceolatum var. lanceolatum | Orchidaceae
|
| STSP10 | Stenorrhynchos speciosus (Jacq.) L.C. Rich. ex Spreng. | Latin American ladies'-tresses | Orchidaceae
|
| STENO10 | Stenorrhynchos L.C. Rich. ex Spreng. | ladies'-tresses | Orchidaceae
|
| STLI2 | Stenosiphon linifolius (Nutt. ex James) Heynh. | false gaura | Onagraceae
|
| STVI11 | Stenosiphon virgatus Spach | Stenosiphon linifolius | Onagraceae
|
| STENO2 | Stenosiphon Spach | stenosiphon | Onagraceae
|
| STAC2 | Stenostomum acutatum DC. | Antirhea acutata | Rubiaceae
|
| STCO12 | Stenostomum coriaceum (Vahl) Griseb. | Antirhea coriacea | Rubiaceae
|
| STLU3 | Stenostomum lucidum (Sw.) Gaertn. f. | Antirhea lucida | Rubiaceae
|
| STOB3 | Stenostomum obtusifolium (Urban) Britt. & Wilson | Antirhea obtusifolia | Rubiaceae
|
| STPO4 | Stenostomum portoricense Britt. & Wilson | Antirhea portoricensis | Rubiaceae
|
| STSI7 | Stenostomum sintenisii (Urban) Britt. & Wilson | Antirhea sintenisii | Rubiaceae
|
| STSE | Stenotaphrum secundatum (Walt.) Kuntze | St. Augustine grass | Poaceae
|
| STENO3 | Stenotaphrum Trin. | St. Augustine grass | Poaceae
|
| STIN7 | Stenotopsis interior (Coville) Rydb. | Ericameria linearifolia | Asteraceae
|
| STLII | Stenotopsis linearifolia (DC.) Rydb. var. interior (Coville) Hall | Ericameria linearifolia | Asteraceae
|
| STLI6 | Stenotopsis linearifolia (DC.) Rydb. | Ericameria linearifolia | Asteraceae
|
| STACA | Stenotus acaulis (Nutt.) Nutt. var. acaulis | stemless mock goldenweed | Asteraceae
|
| STACG | Stenotus acaulis (Nutt.) Nutt. var. glabratus (D.C. Eat.) Kartesz & Gandhi | stemless mock goldenweed | Asteraceae
|
| STAC | Stenotus acaulis (Nutt.) Nutt. | stemless mock goldenweed | Asteraceae
|
| STAN4 | Stenotus andersonii Rydb. | Stenotus lanuginosus var. andersonii | Asteraceae
|
| STARA | Stenotus armerioides Nutt. var. armerioides | thrift mock goldenweed | Asteraceae
|
| STARG | Stenotus armerioides Nutt. var. gramineus (Welsh & F.G. Sm.) Kartesz & Gandhi | grasslike mock goldenweed | Asteraceae
|
| STAR10 | Stenotus armerioides Nutt. | thrift mock goldenweed | Asteraceae
|
| STLAA | Stenotus lanuginosus (Gray) Greene var. andersonii (Rydb.) Hall | Anderson's mock goldenweed | Asteraceae
|
| STLAL | Stenotus lanuginosus (Gray) Greene var. lanuginosus | woolly mock goldenweed | Asteraceae
|
| STLA7 | Stenotus lanuginosus (Gray) Greene | woolly mock goldenweed | Asteraceae
|
| STST5 | Stenotus stenophyllus (Gray) Greene | narrowleaf mock goldenweed | Asteraceae
|
| STENO7 | Stenotus Nutt. | mock goldenweed | Asteraceae
|
| STIN12 | Stephanandra incisa (Thunb.) Zabel | | Rosaceae
|
| STEPH2 | Stephanandra Sieb. & Zucc. | stephanandra | Rosaceae
|
| STBL2 | Stephanomeria blairii Munz & Johnston | Blair's wirelettuce | Asteraceae
|
| STCA11 | Stephanomeria carotifera Hoover | Stephanomeria exigua ssp. carotifera | Asteraceae
|
| STCI | Stephanomeria cichoriacea Gray | chicoryleaf wirelettuce | Asteraceae
|
| STCI5 | Stephanomeria cinerea (Blake) Blake | Stephanomeria pauciflora | Asteraceae
|
| STCO27 | Stephanomeria coronaria Greene | Stephanomeria exigua ssp. coronaria | Asteraceae
|
| STDI6 | Stephanomeria diegensis Gottlieb | wreathplant | Asteraceae
|
| STEL3 | Stephanomeria elata Nutt. | Santa Barbara wirelettuce | Asteraceae
|
| STEXC2 | Stephanomeria exigua Nutt. ssp. carotifera (Hoover) Gottlieb | whiteplume wirelettuce | Asteraceae
|
| STEXC3 | Stephanomeria exigua Nutt. ssp. coronaria (Greene) Gottlieb | whiteplume wirelettuce | Asteraceae
|
| STEXD2 | Stephanomeria exigua Nutt. ssp. deanei (J.F. Macbr.) Gottlieb | Deane's wirelettuce | Asteraceae
|
| STEXE | Stephanomeria exigua Nutt. ssp. exigua | small wirelettuce | Asteraceae
|
| STEXM | Stephanomeria exigua Nutt. ssp. macrocarpa Gottlieb | whiteplume wirelettuce | Asteraceae
|
| STEXP2 | Stephanomeria exigua Nutt. ssp. pentachaeta D.C. Eat. | Stephanomeria exigua ssp. exigua | Asteraceae
|
| STEXC | Stephanomeria exigua Nutt. var. coronaria (Greene) Jepson | Stephanomeria exigua ssp. coronaria | Asteraceae
|
| STEXD | Stephanomeria exigua Nutt. var. deanei J.F. Macbr. | Stephanomeria exigua ssp. deanei | Asteraceae
|
| STEXP | Stephanomeria exigua Nutt. var. pentachaeta (D.C. Eat.) Hall | Stephanomeria exigua ssp. exigua | Asteraceae
|
| STEX | Stephanomeria exigua Nutt. | small wirelettuce | Asteraceae
|
| STLA | Stephanomeria lactucina Gray | lettuce wirelettuce | Asteraceae
|
| STLY | Stephanomeria lygodesmoides M.E. Jones | skeletonweed | Asteraceae
|
| STMA5 | Stephanomeria malheurensis Gottlieb | Malheur wirelettuce | Asteraceae
|
| STMIM | Stephanomeria minor (Hook.) Nutt. var. minor | narrowleaf wirelettuce | Asteraceae
|
| STMIM2 | Stephanomeria minor (Hook.) Nutt. var. myrioclada (D.C. Eat.) Kartesz, comb. nov. ined. | narrowleaf wirelettuce | Asteraceae
|
| STMIU | Stephanomeria minor (Hook.) Nutt. var. uintensis (Goodrich & Welsh) Kartesz, comb. nov. ined. | Uinta wirelettuce | Asteraceae
|
| STMI13 | Stephanomeria minor (Hook.) Nutt. | lesser wirelettuce | Asteraceae
|
| STMY | Stephanomeria myrioclada D.C. Eat. | Stephanomeria minor var. myrioclada | Asteraceae
|
| STNE6 | Stephanomeria neomexicana (Greene) Cory | Stephanomeria pauciflora | Asteraceae
|
| STPA2 | Stephanomeria paniculata Nutt. | tufted wirelettuce | Asteraceae
|
| STPA3 | Stephanomeria parryi Gray | Parry's wirelettuce | Asteraceae
|
| STPAP3 | Stephanomeria pauciflora (Torr.) A. Nels. var. parishii (Jepson) Munz | Stephanomeria pauciflora | Asteraceae
|
| STPA4 | Stephanomeria pauciflora (Torr.) A. Nels. | brownplume wirelettuce | Asteraceae
|
| STRU3 | Stephanomeria runcinata Nutt. | desert wirelettuce | Asteraceae
|
| STSC5 | Stephanomeria schottii Gray | Schott's wirelettuce | Asteraceae
|
| STSP6 | Stephanomeria spinosa (Nutt.) S. Tomb | thorn skeletonweed | Asteraceae
|
| STTEM | Stephanomeria tenuifolia (Raf.) Hall var. myrioclada (D.C. Eat.) Cronq. | Stephanomeria minor var. myrioclada | Asteraceae
|
| STTEU | Stephanomeria tenuifolia (Raf.) Hall var. uintensis Goodrich & Welsh | Stephanomeria minor var. uintensis | Asteraceae
|
| STTE2 | Stephanomeria tenuifolia (Raf.) Hall | Stephanomeria minor var. minor | Asteraceae
|
| STTH | Stephanomeria thurberi Gray | Thurber's wirelettuce | Asteraceae
|
| STVIP | Stephanomeria virgata Benth. ssp. pleurocarpa (Greene) Gottlieb | wand wirelettuce | Asteraceae
|
| STVIV | Stephanomeria virgata Benth. ssp. virgata | rod wirelettuce | Asteraceae
|
| STVIT | Stephanomeria virgata Benth. var. tomentosa (Greene) Munz | Stephanomeria virgata ssp. virgata | Asteraceae
|
| STVI2 | Stephanomeria virgata Benth. | rod wirelettuce | Asteraceae
|
| STWR2 | Stephanomeria wrightii Gray | Wright's wirelettuce | Asteraceae
|