Sedum baleensis 
Sedum caucasicum 
Sedum cespitosum 
Sedum corynephyllum 
Sedum laconicum 
Sedum litoreum 
Sedum oreganum 
Sedum stenopetalum 
Sedum tenellum 
Sempervivum arachnoideum 
Sempervivum marmoreum 
Slightstemmed miterwort 
Small-flowered navelwort 
Small-Fruited Stonecrop 
Smallflower woodland star 
Spanish stonecrop 
Spotted Saxifrage 
Spreading stonecrop 
Spring gooseberry 
Sticky currant 
Stringy Stonecrop 
Swamp stonecrop 
Tellima 
Three-toothed Mitrewort