| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| SABI3 | Sanicula bipinnatifida Dougl. ex Hook. | purple sanicle | Apiaceae
|
| SACAC2 | Sanicula canadensis L. var. canadensis | Canadian blacksnakeroot | Apiaceae
|
| SACAF | Sanicula canadensis L. var. floridana (Bickn.) H. Wolff | Sanicula canadensis var. canadensis | Apiaceae
|
| SACAG2 | Sanicula canadensis L. var. grandis Fern. | Canadian blacksnakeroot | Apiaceae
|
| SACAT | Sanicula canadensis L. var. typica H. Wolff | Sanicula canadensis var. canadensis | Apiaceae
|
| SACA15 | Sanicula canadensis L. | Canadian blacksnakeroot | Apiaceae
|
| SACRC | Sanicula crassicaulis Poepp. ex DC. var. crassicaulis | Pacific blacksnakeroot | Apiaceae
|
| SACRH | Sanicula crassicaulis Poepp. ex DC. var. howellii (Coult. & Rose) Mathias | Sanicula arctopoides | Apiaceae
|
| SACRT | Sanicula crassicaulis Poepp. ex DC. var. tripartita (Suksdorf) H. Wolff | Pacific blacksnakeroot | Apiaceae
|
| SACR2 | Sanicula crassicaulis Poepp. ex DC. | Pacific blacksnakeroot | Apiaceae
|
| SAFL9 | Sanicula floridana Bickn. | Sanicula canadensis var. canadensis | Apiaceae
|
| SAGRS | Sanicula graveolens Poepp. ex DC. var. septentrionalis (Greene) St. John | Sanicula graveolens | Apiaceae
|
| SAGR5 | Sanicula graveolens Poepp. ex DC. | northern sanicle | Apiaceae
|
| SAGR6 | Sanicula gregaria Bickn. | Sanicula odorata | Apiaceae
|
| SAHA11 | Sanicula haleakalae St. John | Sanicula sandwicensis | Apiaceae
|
| SAHO2 | Sanicula hoffmannii (Munz) Shan & Constance (pro hybr.) | Hoffmann's blacksnakeroot | Apiaceae
|
| SAHO8 | Sanicula �howellii (Coult. & Rose) Shan & Constance | Sanicula arctopoides | Apiaceae
|
| SAKA2 | Sanicula kauaiensis St. John | Kauai blacksnakeroot | Apiaceae
|
| SALA7 | Sanicula laciniata Hook. & Arn. | coastal blacksnakeroot | Apiaceae
|
| SALO13 | Sanicula lobata (Hbd. ex H. Wolff) St. John | Sanicula purpurea | Apiaceae
|
| SAMAP | Sanicula marilandica L. var. petiolulata Fern. | Sanicula marilandica | Apiaceae
|
| SAMA2 | Sanicula marilandica L. | Maryland sanicle | Apiaceae
|
| SAMA3 | Sanicula maritima Kellogg ex S. Wats. | adobe snakeroot | Apiaceae
|
| SAMA9 | Sanicula mariversa Nagata & Gon | Waianae Range blacksnakeroot | Apiaceae
|
| SANES | Sanicula nevadensis S. Wats. var. septentrionalis (Greene) Mathias | Sanicula graveolens | Apiaceae
|
| SANE4 | Sanicula nevadensis S. Wats. | Sanicula graveolens | Apiaceae
|
| SAOD | Sanicula odorata (Raf.) K.M. Pryer & L.R. Phillippe | clustered blacksnakeroot | Apiaceae
|
| SAPE7 | Sanicula peckiana J.F. Macbr. | Peck's blacksnakeroot | Apiaceae
|
| SAPU8 | Sanicula purpurea St. John & Hosaka | purpleflower blacksnakeroot | Apiaceae
|
| SASAL | Sanicula sandwicensis Gray var. lobata Hbd. ex H. Wolff | Sanicula purpurea | Apiaceae
|
| SASA9 | Sanicula sandwicensis Gray | Hawai'i blacksnakeroot | Apiaceae
|
| SASA3 | Sanicula saxatilis Greene | devil's blacksnakeroot | Apiaceae
|
| SASE19 | Sanicula septentrionalis Greene | Sanicula graveolens | Apiaceae
|
| SASI12 | Sanicula simulans Hoover | Sanicula arguta | Apiaceae
|
| SASM | Sanicula smallii Bickn. | Small's blacksnakeroot | Apiaceae
|
| SATR3 | Sanicula tracyi Shan & Constance | Tracy's blacksnakeroot | Apiaceae
|
| SATR4 | Sanicula trifoliata Bickn. | largefruit blacksnakeroot | Apiaceae
|
| SATR13 | Sanicula tripartita Suksdorf | Sanicula crassicaulis var. tripartita | Apiaceae
|
| SATU | Sanicula tuberosa Torr. | turkey pea | Apiaceae
|
| SANIC | Sanicula L. | sanicle | Apiaceae
|
| SACU2 | Sanidophyllum cumulicola Small | Hypericum cumulicola | Clusiaceae
|
| SAOR9 | Sanionia orthothecioides (Lindb.) Loeske | sanionia moss | Amblystegiaceae
|
| SAUNS | Sanionia uncinata (Hedw.) Loeske var. symmetrica (Ren. & Card.) Crum & Anderson | symmetric sanionia moss | Amblystegiaceae
|
| SAUNU | Sanionia uncinata (Hedw.) Loeske var. uncinata | sanionia moss | Amblystegiaceae
|
| SAUN8 | Sanionia uncinata (Hedw.) Loeske | sanionia moss | Amblystegiaceae
|
| SANIO | Sanionia Loeske | sanionia moss | Amblystegiaceae
|
| SAHY2 | Sansevieria hyacinthoides (L.) Druce | iguanatail | Agavaceae
|
| SAME9 | Sansevieria metallica Horton ex Gerome & Labroy | Sansevieria hyacinthoides | Agavaceae
|
| SARO4 | Sansevieria roxburghiana Schultes & Schultes f. | Indian bowstring hemp | Agavaceae
|
| SASE16 | Sansevieria senegambica Baker | bowstring hemp | Agavaceae
|
| SATH | Sansevieria thyrsiflora Thunb. | Sansevieria hyacinthoides | Agavaceae
|
| SATR6 | Sansevieria trifasciata Prain | viper's bowstring hemp | Agavaceae
|
| SANSE | Sansevieria Thunb. | sansevieria | Agavaceae
|
| SAAL16 | Santalum album L. | sandalwood | Santalaceae
|
| SAELL | Santalum ellipticum Gaud. var. latifolium (Gray) Fosberg | Santalum paniculatum var. paniculatum | Santalaceae
|
| SAELL2 | Santalum ellipticum Gaud. var. littorale (Hbd.) Skottsberg | Santalum ellipticum | Santalaceae
|
| SAELL3 | Santalum ellipticum Gaud. var. luteum (Rock) O. Deg. | Santalum paniculatum var. paniculatum | Santalaceae
|
| SAEL2 | Santalum ellipticum Gaud. | coastal sandalwood | Santalaceae
|
| SAFRF | Santalum freycinetianum Gaud. var. freycinetianum | forest sandalwood | Santalaceae
|
| SAFRL2 | Santalum freycinetianum Gaud. var. lanaiense Rock | Lanai sandalwood | Santalaceae
|
| SAFRL | Santalum freycinetianum Gaud. var. longifolium (Meurisse) O. Deg. | Santalum freycinetianum var. freycinetianum | Santalaceae
|
| SAFRP | Santalum freycinetianum Gaud. var. pyrularium (Gray) Stemmermann | forest sandalwood | Santalaceae
|
| SAFR4 | Santalum freycinetianum Gaud. | forest sandalwood | Santalaceae
|
| SAHA3 | Santalum haleakalae Hbd. | Haleakala sandalwood | Santalaceae
|
| SAIN8 | Santalum involutum St. John | Santalum freycinetianum var. pyrularium | Santalaceae
|
| SALA9 | Santalum lanaiense (Rock) Rock | Santalum freycinetianum var. lanaiense | Santalaceae
|
| SAMA21 | Santalum majus St. John | Santalum freycinetianum var. pyrularium | Santalaceae
|
| SAPAC | Santalum paniculatum Hook. & Arn. var. chartaceum O.& I. Deg. | Santalum paniculatum var. paniculatum | Santalaceae
|
| SAPAP | Santalum paniculatum Hook. & Arn. var. paniculatum | mountain sandalwood | Santalaceae
|
| SAPAP2 | Santalum paniculatum Hook. & Arn. var. pilgeri (Rock) Stemmermann | Pilger's sandalwood | Santalaceae
|
| SAPA7 | Santalum paniculatum Hook. & Arn. | mountain sandalwood | Santalaceae
|
| SAPYS | Santalum pyrularium Gray var. sphaerolithos Skottsberg | Santalum freycinetianum var. pyrularium | Santalaceae
|
| SAPY2 | Santalum pyrularium Gray | Santalum freycinetianum var. pyrularium | Santalaceae
|
| SASA8 | Santalum salicifolium Meurisse | willowleaf sandalwood | Santalaceae
|
| SANTA | Santalum L. | sandalwood | Santalaceae
|
| SACH2 | Santolina chamaecyparissus L. | lavender cotton | Asteraceae
|
| SASU14 | Santolina suaveolens Pursh | Matricaria discoidea | Asteraceae
|
| SANTO | Santolina L. | lavender cotton | Asteraceae
|
| SAAB | Sanvitalia abertii Gray | Albert's creeping zinnia | Asteraceae
|
| SAAN11 | Sanvitalia angustifolia Gray | Sanvitalia procumbens | Asteraceae
|
| SAOC3 | Sanvitalia ocymoides DC. | yellow creeping zinnia | Asteraceae
|
| SAPR6 | Sanvitalia procumbens Lam. | Mexican creeping zinnia | Asteraceae
|
| SANVI | Sanvitalia Lam. | creeping zinnia | Asteraceae
|
| SADR5 | Sapindus drummondii Hook. & Arn. | Sapindus saponaria var. drummondii | Sapindaceae
|
| SALO4 | Sapindus lonomea St. John | Sapindus oahuensis | Sapindaceae
|
| SAMA4 | Sapindus marginatus Willd. | Sapindus saponaria var. saponaria | Sapindaceae
|
| SAMU6 | Sapindus mukorossi Gaertner | Chinese soapberry | Sapindaceae
|
| SAOA2 | Sapindus oahuensis Hbd. ex Radlk. | lonomea | Sapindaceae
|
| SASAD | Sapindus saponaria L. var. drummondii (Hook. & Arn.) L. Benson | western soapberry | Sapindaceae
|
| SASAS | Sapindus saponaria L. var. saponaria | wingleaf soapberry | Sapindaceae
|
| SASA4 | Sapindus saponaria L. | wingleaf soapberry | Sapindaceae
|
| SATH4 | Sapindus thurstonii Rock | Sapindus saponaria var. saponaria | Sapindaceae
|
| SATR10 | Sapindus trifoliatus L. | threeleaf soapberry | Sapindaceae
|
| SAPIN | Sapindus L. | soapberry | Sapindaceae
|
| SAAU4 | Sapium aucuparium auct. non Jacq. | Sapium laurifolium | Euphorbiaceae
|
| SABI4 | Sapium biloculare (S. Wats.) Pax | Sebastiania bilocularis | Euphorbiaceae
|
| SACA25 | Sapium caribaeum Urban | gumtree | Euphorbiaceae
|
| SAGL5 | Sapium glandulosum auct. non (L.) Morong | Sapium caribaeum | Euphorbiaceae
|
| SAJA3 | Sapium jamaicense Sw. nom. illeg. | Sapium laurifolium | Euphorbiaceae
|
| SALA25 | Sapium laurifolium (A. Rich.) Griseb. | hinchahuevos | Euphorbiaceae
|
| SALA8 | Sapium laurocerasus Desf. | milktree | Euphorbiaceae
|