Stachytarpheta cayennensis Stachytarpheta frantzii
Stachytarpheta jamaicensis Stachytarpheta mutabilis
Stachytarpheta mutabilis 'Variegata' Stachytarpheta urticifolia 'Prostrate Blue'
Stachyurus chinensis 'Joy Forever' Stachyurus chinensis 'Magpie'
Stachyurus praecox Stachyurus praecox 'Rubriflora'
Stapelia Stapelia gigantea
Stapelia grandiflora Stapelia schinzii
Staphylea holocarpa Stellaria media
Stenocarpus sinuatus Stenocereus alamosensis
Stenocereus dumortieri Stenocereus eruca
Stenocereus griseus Stenocereus gummosus
Stenocereus hystrix Stenocereus montanus
Stenocereus thurberi Stenospermation x 'San Carlos'
Stenotaphrum secundatum 'Variegatum' Stephanandra incisa
Stephanandra incisa 'Crispa' Stephanotis floribunda
Sterculia ceramica Sternbergia clusiana
Sternbergia lutea Stevia rebaudiana
Stevia spp. Stewartia malacodendron
Stewartia monadelpha Stewartia ovata
Stewartia pseudocamellia Stewartia ptero-petiolata var. koreana
Stewartia rostrata Stewartia serrata
Stictocardia beraviensis Stipa arundinacea
Stipa gigantea Stipa tenuissima
Stokesia laevis Stokesia laevis 'Blue Danube'
Stokesia laevis 'Honeysong Purple' Stokesia laevis 'Klaus Jelitto'
Stokesia laevis 'Mary Gregory' Stokesia laevis 'Omega Skyrocket'
Stokesia laevis 'Purple Parasols' Stokesia laevis 'Silver Moon'
Stratiotes aloides Strelitzia nicolai
Strelitzia reginae Streptocarpus x hybridus
Streptocarpus saxorum Streptosolen jamesonii
Strobilanthes dyerianus Stromanthe 'Burle Marx'
Strongylodon macrobotrys Stylophorum diphyllum
Styrax americanum Styrax japonicum
Styrax japonicum 'Emerald Pagoda' Styrax japonicum 'Rubra Pendula'
Styrax obassia Suriana maritima
Sutera cordata 'Abunda White Improved' Sutera cordata 'Giant Snowflake'
Sutera diffusa 'Sunlovers Bacopa 1766' Swainsona formosa
Swietenia macrophylla Swietenia mahagoni
Swietenia mahagoni x macrophylla Syagrus coronata
Syagrus romanzoffianum Syagrus samcona
Syagrus schizophylla Symphoricarpos x 'Mother of Pearl'
Symphoricarpos x chenaultii 'Hancock' Symphoricarpos x doorenbosii 'Kordes(Amethyst™)'
Symphoricarpos x doorenbosii 'Magic Berry' Symphoricarpos x doorenbosii 'White Hedge'
Symphoricarpos microphyllus