| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| SEME3 | Sedum mexicanum Britt. | Mexican stonecrop | Crassulaceae
|
| SEMO2 | Sedum moranense Kunth | red stonecrop | Crassulaceae
|
| SEMO5 | Sedum moranii Clausen | Rogue River stonecrop | Crassulaceae
|
| SENA | Sedum nanifolium Fr�d. | dwarf stonecrop | Crassulaceae
|
| SENE | Sedum nevii Gray | Nevius' stonecrop | Crassulaceae
|
| SENI | Sedum niveum A. Davids. | Davidson's stonecrop | Crassulaceae
|
| SENU | Sedum nuttallianum Raf. | yellow stonecrop | Crassulaceae
|
| SEOB3 | Sedum oblanceolatum Clausen | oblongleaf stonecrop | Crassulaceae
|
| SEOBB | Sedum obtusatum Gray ssp. boreale Clausen | Sierra stonecrop | Crassulaceae
|
| SEOBO | Sedum obtusatum Gray ssp. obtusatum | Sierra stonecrop | Crassulaceae
|
| SEOBP2 | Sedum obtusatum Gray ssp. paradisum (Denton) Denton | Sedum paradisum | Crassulaceae
|
| SEOBR | Sedum obtusatum Gray ssp. retusum (Rose) Clausen | Sierra stonecrop | Crassulaceae
|
| SEOB | Sedum obtusatum Gray | Sierra stonecrop | Crassulaceae
|
| SEOC | Sedum ochroleucum Chaix | European stonecrop | Crassulaceae
|
| SEORO | Sedum oreganum Nutt. ssp. oreganum | Oregon stonecrop | Crassulaceae
|
| SEORT | Sedum oreganum Nutt. ssp. tenue Clausen | Oregon stonecrop | Crassulaceae
|
| SEOR | Sedum oreganum Nutt. | Oregon stonecrop | Crassulaceae
|
| SEOR2 | Sedum oregonense (S. Wats.) M.E. Peck | cream stonecrop | Crassulaceae
|
| SEPA15 | Sedum paradisum Denton | Canyon Creek stonecrop | Crassulaceae
|
| SEPAN | Sedum parvum Hemley ssp. nanifolium (Fr�d.) Clausen | Sedum nanifolium | Crassulaceae
|
| SEPA8 | Sedum parvum Hemley | Sedum nanifolium | Crassulaceae
|
| SEPR2 | Sedum praealtum DC. | green cockscomb | Crassulaceae
|
| SEPU | Sedum pulchellum Michx. | widowscross | Crassulaceae
|
| SEPU10 | Sedum purdyi Jepson | Sedum spathulifolium ssp. purdyi | Crassulaceae
|
| SEPU5 | Sedum purpureum (L.) J.A. Schultes | Hylotelephium telephium ssp. telephium | Crassulaceae
|
| SEPU6 | Sedum pusillum Michx. | granite stonecrop | Crassulaceae
|
| SERAC | Sedum radiatum S. Wats. ssp. ciliosum (T.J. Howell) Clausen | Coast Range stonecrop | Crassulaceae
|
| SERAD | Sedum radiatum S. Wats. ssp. depauperatum Clausen | Coast Range stonecrop | Crassulaceae
|
| SERAR | Sedum radiatum S. Wats. ssp. radiatum | Coast Range stonecrop | Crassulaceae
|
| SERA4 | Sedum radiatum S. Wats. | Coast Range stonecrop | Crassulaceae
|
| SERE4 | Sedum reflexum L. | Jenny's stonecrop | Crassulaceae
|
| SERH | Sedum rhodanthum Gray | Rhodiola rhodantha | Crassulaceae
|
| SERO7 | Sedum robertsianum Alexander | Sedum nanifolium | Crassulaceae
|
| SEROI3 | Sedum rosea (L.) Scop. ssp. integrifolium (Raf.) Hult�n | Rhodiola integrifolia ssp. integrifolia | Crassulaceae
|
| SEROA | Sedum rosea (L.) Scop. var. alaskanum (Rose) Berger | Rhodiola integrifolia ssp. integrifolia | Crassulaceae
|
| SEROF | Sedum rosea (L.) Scop. var. frigidum (Rydb.) Hult�n | Rhodiola integrifolia ssp. integrifolia | Crassulaceae
|
| SEROI2 | Sedum rosea (L.) Scop. var. integrifolium (Raf.) Berger | Rhodiola integrifolia ssp. integrifolia | Crassulaceae
|
| SEROL | Sedum rosea (L.) Scop. var. leedyi Rosendahl & Moore | Rhodiola integrifolia ssp. leedyi | Crassulaceae
|
| SEROR | Sedum rosea (L.) Scop. var. roanense (Britt.) Berger | Rhodiola rosea | Crassulaceae
|
| SERO2 | Sedum rosea (L.) Scop. | Rhodiola rosea | Crassulaceae
|
| SERU80 | Sedum rupestre L. | Sedum reflexum | Crassulaceae
|
| SERU3 | Sedum rupicola G.N. Jones | curvedleaf stonecrop | Crassulaceae
|
| SESA | Sedum sarmentosum Bunge | stringy stonecrop | Crassulaceae
|
| SESE6 | Sedum sexangulare L. | tasteless stonecrop | Crassulaceae
|
| SESM2 | Sedum smallii (Britt. ex Small) Ahles | Diamorpha smallii | Crassulaceae
|
| SESPA | Sedum spathulifolium Hook. ssp. anomalum (Britt.) Clausen & Uhl | Sedum spathulifolium ssp. spathulifolium | Crassulaceae
|
| SESPP | Sedum spathulifolium Hook. ssp. pruinosum (Britt.) Clausen & Uhl | broadleaf stonecrop | Crassulaceae
|
| SESPP2 | Sedum spathulifolium Hook. ssp. purdyi (Jepson) Clausen | Purdy's stonecrop | Crassulaceae
|
| SESPS | Sedum spathulifolium Hook. ssp. spathulifolium | broadleaf stonecrop | Crassulaceae
|
| SESPY | Sedum spathulifolium Hook. ssp. yosemitense (Britt.) Clausen | Yosemite stonecrop | Crassulaceae
|
| SESPM2 | Sedum spathulifolium Hook. var. majus Praeger | Sedum spathulifolium ssp. yosemitense | Crassulaceae
|
| SESPP4 | Sedum spathulifolium Hook. var. pruinosum (Britt.) Boivin | Sedum spathulifolium ssp. pruinosum | Crassulaceae
|
| SESP | Sedum spathulifolium Hook. | broadleaf stonecrop | Crassulaceae
|
| SESP6 | Sedum spectabile Boreau | Hylotelephium spectabile | Crassulaceae
|
| SESP2 | Sedum spurium Bieb. | tworow stonecrop | Crassulaceae
|
| SEST | Sedum stelliforme S. Wats. | Huachuca Mountain stonecrop | Crassulaceae
|
| SESTC | Sedum stenopetalum Pursh ssp. ciliosum (T.J. Howell) Clausen | Sedum radiatum ssp. ciliosum | Crassulaceae
|
| SESTM | Sedum stenopetalum Pursh ssp. monanthum (Suksdorf) Clausen | wormleaf stonecrop | Crassulaceae
|
| SESTR2 | Sedum stenopetalum Pursh ssp. radiatum (S. Wats.) Clausen | Sedum radiatum ssp. radiatum | Crassulaceae
|
| SESTS2 | Sedum stenopetalum Pursh ssp. stenopetalum | wormleaf stonecrop | Crassulaceae
|
| SEST2 | Sedum stenopetalum Pursh | wormleaf stonecrop | Crassulaceae
|
| SEST8 | Sedum stoloniferum Gmel. | stolon stonecrop | Crassulaceae
|
| SESU7 | Sedum subalpinum Blank. | Sedum lanceolatum ssp. subalpinum | Crassulaceae
|
| SETE | Sedum telephioides Michx. | Hylotelephium telephioides | Crassulaceae
|
| SETEF | Sedum telephium L. ssp. fabaria (W.D.J. Koch) Schinz & R. Keller | Hylotelephium telephium ssp. fabaria | Crassulaceae
|
| SETEP | Sedum telephium L. ssp. purpureum (L.) Schinz & Keller | Hylotelephium telephium ssp. telephium | Crassulaceae
|
| SETE2 | Sedum telephium L. | Hylotelephium telephium ssp. telephium | Crassulaceae
|
| SETE3 | Sedum ternatum Michx. | woodland stonecrop | Crassulaceae
|
| SETE11 | Sedum texanum J.G. Sm. | Lenophyllum texanum | Crassulaceae
|
| SETR5 | Sedum triphyllum (Haw.) S.F. Gray | Hylotelephium telephium ssp. telephium | Crassulaceae
|
| SEVI8 | Sedum vigilimontis Small | Sedum pulchellum | Crassulaceae
|
| SEWO2 | Sedum wootonii Britt. | Sedum cockerellii | Crassulaceae
|
| SEWRP | Sedum wrightii Gray ssp. priscum Clausen | Wright's stonecrop | Crassulaceae
|
| SEWRW | Sedum wrightii Gray ssp. wrightii | Wright's stonecrop | Crassulaceae
|
| SEWR | Sedum wrightii Gray | Wright's stonecrop | Crassulaceae
|
| SEYO | Sedum yosemitense Britt. | Sedum spathulifolium ssp. yosemitense | Crassulaceae
|
| SEDUM | Sedum L. | stonecrop | Crassulaceae
|
| SELE12 | Segestria leptalea (Durieu & Mont.) R. C. Harris | | Trichotheliaceae
|
| SEMA19 | Segestria mammillosa Th. Fr. | | Trichotheliaceae
|
| SEOC3 | Segestria octomera (Mull. Arg.) R. C. Harris | | Trichotheliaceae
|
| SERU9 | Segestria rubentior (Stirton) R. C. Harris | | Trichotheliaceae
|
| SEGES | Segestria Fr. | segestria | Trichotheliaceae
|
| SEAC4 | Selaginella acanthonota Underwood | spiny spikemoss | Selaginellaceae
|
| SEAL6 | Selaginella albonitens Spring | Selaginella tenella | Selaginellaceae
|
| SEAP | Selaginella apoda (L.) Spring | meadow spikemoss | Selaginellaceae
|
| SEAP3 | Selaginella apus Spring | Selaginella apoda | Selaginellaceae
|
| SEAR5 | Selaginella arbuscula (Kaulfuss) Spring | dwarf spikemoss | Selaginellaceae
|
| SEARA | Selaginella arenicola Underwood ssp. acanthonota (Underwood) R. Tryon | Selaginella acanthonota | Selaginellaceae
|
| SEARA2 | Selaginella arenicola Underwood ssp. arenicola | sand spikemoss | Selaginellaceae
|
| SEARR | Selaginella arenicola Underwood ssp. riddellii (Van Eselt.) R. Tryon | Riddell's spikemoss | Selaginellaceae
|
| SEARR2 | Selaginella arenicola Underwood var. riddellii (Van Eselt.) Waterfall | Selaginella arenicola ssp. riddellii | Selaginellaceae
|
| SEAR | Selaginella arenicola Underwood | sand spikemoss | Selaginellaceae
|
| SEAR2 | Selaginella arizonica Maxon | Arizona spikemoss | Selaginellaceae
|
| SEAR6 | Selaginella armata Baker | armored spikemoss | Selaginellaceae
|
| SEAS | Selaginella asprella Maxon | bluish spikemoss | Selaginellaceae
|
| SEBI | Selaginella bigelovii Underwood | bushy spikemoss | Selaginellaceae
|
| SEBR3 | Selaginella braunii Baker | Braun's spikemoss | Selaginellaceae
|
| SECI | Selaginella cinerascens A.A. Eat. | mesa spikemoss | Selaginellaceae
|
| SECO5 | Selaginella cordifolia (Desv. ex Poir.) Spring | heartleaf spikemoss | Selaginellaceae
|
| SEDE4 | Selaginella deflexa Brack. | deflexed spikemoss | Selaginellaceae
|
| SEDED | Selaginella densa Rydb. var. densa | lesser spikemoss | Selaginellaceae
|