| | | | |
| S | Genus | Species | Cultivar | Common Name |
 | SALVIA | | 'Indigo Spires' | |
 | SALVIA | | 'Mulberry Jam' | |
 | SALVIA | | 'Salmon' | |
 | SALVIA | | 'Waverly' | |
 | SALVIA | blancoana | | Spanish Sage |
 | SALVIA | blepharophylla | | |
 | SALVIA | buchananii | | AGM |
 | SALVIA | confertiflora | | |
 | SALVIA | darcyi | | |
 | SALVIA | discolor | | |
 | SALVIA | dolichantha | | |
 | SALVIA | elegans | 'Scarlet Pineapple' | Pineapple Sage. Syn S.rutilans |
 | SALVIA | forsskaolii | | |
 | SALVIA | glutinosa | | |
 | SALVIA | greggii | 'CD&R' 1148 | |
 | SALVIA | greggii | 'Icing Sugar' | |
 | SALVIA | greggii | 'Navajo Purple' | |
 | SALVIA | greggii | 'Peach' | |
 | SALVIA | greggii | 'Stormy Pink' | |
 | SALVIA | greggii | x serpyllifolia | syn. S.g. x lyciodies |
 | SALVIA | guaranitica | 'Blue Enigma' | AGM syn. S.ambigens |
 | SALVIA | interrupta | | |
 | SALVIA | involucrata | | AGM |
 | SALVIA | leucantha | | AGM |
 | SALVIA | microphylla | 'Blush Pink' | |
 | SALVIA | microphylla | 'Pink Blush' | AGM |
 | SALVIA | microphylla | var. microphylla | syn. S.grahamii |
 | SALVIA | microphylla | var. neurepia | |
 | SALVIA | nemorosa | 'Caradonna' | |
 | SALVIA | nemorosa | 'Lubecca' | AGM |
 | SALVIA | nemorosa | 'Pusztaflamme' | AGM syn. S. 'Plumosa' |
 | SALVIA | officinalis | 'Berggarten' | |
 | SALVIA | patens | | AGM Gentian Sage |
 | SALVIA | patens | 'Blue Angel' | |
 | SALVIA | patens | 'Cambridge Blue' | AGM |
 | SALVIA | pratensis | 'Indigo' | AGM |
 | SALVIA | przewalskii | | |
 | SALVIA | sclarea var. turkestanica | | Biennial Clary |
 | SALVIA | transsylvanica | 'Blue Spire' | |
 | SALVIA | uliginosa | | AGM Bog Sage |
 | SALVIA | verticillata | 'Alba' | |
 | SALVIA | x jamensis | 'Desert Blaze' | |
 | SALVIA | x jamensis | 'Hot Lips' | |
 | SALVIA | x jamensis | 'La Luna' | |
 | SALVIA | x jamensis | 'Raspberry Royale' | AGM |
 | SALVIA | x jamensis | 'Trebah' | syn. S.'Trebah Lilac White' |
 | SALVIA | x sylvestris | 'Blauhugel' | AGM |
 | SALVIA | x sylvestris | 'Mainacht' | AGM syn. S.'May Night' |
 | SALVIA | x sylvestris | 'Rose Queen' | |
 | SALVIA | x sylvestris | 'Viola Klose' | |
 | SANGUISORBA | menziesii | | |
 | SANGUISORBA | obtusa | | |
 | SANGUISORBA | officinalis | 'Pink Tanna' | |
 | SANGUISORBA | tenuifolia | | |
 | SANGUISORBA | tenuifolia | var alba | |
 | SANTOLINA | pinnata subsp.neapolitana | 'Edward Bowles' | AGM Syn. S.neapolitana |
 | SANTOLINA | rosmarinifolia | subsp. Romarinifolia | Syn. S.viridis |
 | SAPONARIA | x lempergii | 'Max Frei' | |
 | SAXIFRAGA | | 'Rubrifolia' | syn. S.fortunei 'Rubrifolia' |
 | SAXIFRAGA | | 'Southside Seedling Group' | AGM |
 | SAXIFRAGA | | 'Wada' | |
 | SCABIOSA | atropurpurea | 'Ace of Spades' | |
 | SCABIOSA | caucasica | 'Blausiegel' | |
 | SCABIOSA | caucasica | 'Miss Wilmott' | AGM |
 | SCABIOSA | caucasica | 'Stafa' | |
 | SCHIZOSTYLIS | coccinea | 'Major' | AGM |
 | SCHIZOSTYLIS | coccinea | 'Pink Princess' | syn. S.c.'Wilfred H Bryant' |
 | SCHIZOSTYLIS | coccinea | 'Sunrise' | AGM syn. 'Sunset' |
 | SCOPOLIA | carniolica | | |
 | SEDUM | | 'Autumn Joy' | syn S.'Herbstfreude' |
 | SEDUM | | 'Bertram Anderson' | AGM |
 | SEDUM | | 'Carl' | |
 | SEDUM | | 'Jose Aubergine' | |
 | SEDUM | | 'Joyce Henderson' | |
 | SEDUM | | 'Matrona' | AGM |
 | SEDUM | | 'Purple Emperor' | |
 | SEDUM | | 'Raspberry Red' | |
 | SEDUM | | 'Red Cauli' | |
 | SEDUM | | 'Ruby Glow' | AGM |
 | SEDUM | | 'Stewed Rhubarb Mountain' | |
 | SEDUM | | 'Vera Jameson' | AGM |
 | SEDUM | | 'Xenox' | |
 | SEDUM | cauticola | 'Coca-cola' | |
 | SEDUM | erythrostictum | 'Frosty Morn' | |
 | SEDUM | spectabile | | AGM Ice Plant |
 | SEDUM | spectabile | 'Iceberg' | |
 | SEDUM | spurium | 'Variegatum' | |
 | SEDUM | telephium subsp. | ruprectii | |
 | SEDUM | telephium subsp. Ruprectii | 'Hab Grey' | |
 | SELINUM | wallichianum | | syn. S. tenuifolium |
 | SESELI | libanotis | | Moon carrot |
 | SIDALCEA | | 'Croftway Red' | |
 | SIDALCEA | | 'Elsie Heugh' | |
 | SIDALCEA | | 'Party Girl' | |
 | SIDALCEA | | 'Rose Queen' | Prairie Mallow |
 | SIDALCEA | | 'Sussex Beauty' | |
 | SIDALCEA | | 'Wine Red' | |
 | SIDALCEA | candida | | |
 | SILENE | fimbriata | | |
 | SINNINGIA | tuberosa | | |
 | SISYRINCHIUM | | 'E.K. Balls' | |
 | SISYRINCHIUM | | 'Quaint 'n' Queer' | |
 | SISYRINCHIUM | | 'Raspberry' | |
 | SISYRINCHIUM | angustifolium | album | |
 | SISYRINCHIUM | striatum | | |
 | SMYRNIUM | olusatrum | | Alexanders |
 | SOLANUM | rantonnetii | | |
 | SOLIDAGO | | 'Goldkind' | syn S.'Golden Baby' |
 | SOLIDAGO | | 'Ledsham' | |
 | SOLLYA | heterophylla | | AGM Bluebell Creeper |
 | SPHAERALCEA | | 'Childerley' | |
 | SPIRANTHES | cernua var. odorata | 'Chadd's Ford' | |
 | STACHYS | byzantina | | syn. S.lanata. Lambs' Ears |
 | STACHYS | byzantina | 'Silver Carpet' | |
 | STACHYS | officinalis | | Betony |
 | STIPA | gigantea | | AGM Giant Feather Grass |
 | STIPA | tenuifolia | | |
 | STROBILANTHES | atropurpurea (attenuata) | | |
 | SYMPHYANDRA | campanulatum | | |
 | SYMPHYTUM | | 'Goldsmith' | |
 | SYRINGA | palibiniana | | Miniature Lilac |