Spartina alternifolia Spartina bakeri
Spartina pectinata 'Aureo-marginata' Spartium junceum
Spathiphyllum x Spathiphyllum x 'Sensation'
Spathiphyllum x 'Supreme' Spathiphyllum x 'Taylor's Green'
Spathiphyllum wallisii 'Clevelandii' Spathodea campanulata
Sphaeralcea ambigua Sphaeralcea munroana
Spigelia marilandica Spinacia oleracea 'Melody'
Spiraea 'Candle Light' Spiraea 'Goldmound'
Spiraea betulifolia Spiraea betulifolia 'Tor'
Spiraea betulifolia 'Tor Gold (Glow Girl®)' Spiraea x billardii 'Triumphans'
Spiraea x bumalda 'Crispii' Spiraea cantoniensis
Spiraea x cinerea 'Grefsheim' Spiraea decumbens
Spiraea douglasii Spiraea formosana
Spiraea fritschiana Spiraea fritschiana 'Wilma(Pink Parasols®)'
Spiraea japonica 'Alpina' Spiraea japonica 'Anthony Waterer'
Spiraea japonica 'Bullata' Spiraea japonica 'Candlelight'
Spiraea japonica 'Crispa' Spiraea japonica 'Dakota Goldcharm'
Spiraea japonica 'Dart's Red' Spiraea japonica 'Dolchica'
Spiraea japonica 'Firelight' Spiraea japonica 'Flaming Mound'
Spiraea japonica 'Frobelii' Spiraea japonica 'Galen (Double Play® Artisan®)'
Spiraea japonica 'Golden Elf' Spiraea japonica 'Golden Princess'
Spiraea japonica 'Goldflame' Spiraea japonica 'Lemon Princess'
Spiraea japonica 'Limemound®' Spiraea japonica 'Little Princess'
Spiraea japonica 'Macrophylla' Spiraea japonica 'Magic Carpet'
Spiraea japonica 'Mertyann (Dakota Goldcharm®)' Spiraea japonica 'Nana'
Spiraea japonica 'NCSXI (Double Play® Candy Corn™)' Spiraea japonica 'Neon Flash'
Spiraea japonica 'Norman' Spiraea japonica 'Shirobana'
Spiraea japonica 'Tracy (Double Play® Big Bang™)' Spiraea japonica 'White Gold'
Spiraea japonica 'Yan (Double Play® Gold)' Spiraea japonica var. fortunei 'Albiflora'
Spiraea media 'Darsnorm(Snow Storm™)' Spiraea media 'SMSMBK (Double Play® Blue Kazoo®)'
Spiraea miyabei Spiraea nipponica
Spiraea nipponica 'Snowmound' Spiraea prunifolia
Spiraea prunifolia 'Plena' Spiraea slatchenfella
Spiraea splendens Spiraea tarokoensis
Spiraea thunbergii Spiraea thunbergii 'Mt. Fuji'
Spiraea trilobata 'Fairy Queen' Spiraea trilobata 'Swan Lake'
Spiraea x vanhouttei Spiraea x vanhouttei 'Pink Ice'
Spiraea x vanhouttei 'Renaissance' Spiraea virginiana
Spiranthes cernua var. odorata Spiranthes odorata 'Chadds Ford'
Spodiopogon sibiricus Spondias dulcis
Spondias mombin Sporobolus capillaris
Sporobolus heterolepis Sporobolus lindheimeri
Sprekelia formosissima 'Superba' Stachys albens
Stachys albotomentosa Stachys byzantina
Stachys byzantina 'Big Ears' Stachys byzantina 'Helen von Stein'
Stachys byzantina 'Silver Carpet' Stachys macrantha 'Robusta'
Stachys monnieri 'Hummelo' Stachys officinalis
Stachys officinalis 'Grandiflora' Stachys palustris