S
- ``Sabal`` (palmetto)
- ``Saccharum`` (plume grass, sugar cane)
- ``Sadleria``
- ``Sagina`` (pearlwort)
- ``Sagittaria`` (arrowhead)
- ``Saintpaulia`` (Afrika menekşesi)
- ``Salicornia`` - Deniz Böğrülcesi - (Kurşunotu)
- ``Salix`` (Söğüt)
- ``Salpiglossus``
- ``Salvia`` - Adaçayı - (sage)
- ``Salvinia``
- ``Sambucus`` - Mürver - (elder)
- ``Sanchezia``
- ``Sandersonia``
- ``Sanguineria`` (bloodroot)
- ``Sanguisorba`` (burnet)
- ``Sanservieria``
- ``Santolina``
- ``Sanvitalia`` (creeping zinnia)
- ``Sapindus``
- ``Sapium`` (tallow tree)
- ``Saponaria`` (soapwort)
- ``Sarcocapnos``
- ``Sarcocaulon``
- ``Sarcococca``
- ``Saritaea``
- ``Sarmienta``
- ``Sarracenia`` (pitcher plant)
- ``Sasa``
- ``Sassafras``
- ``Satureja`` (savory)
- ``Sauromatum``
- ``Saxegothaea``
- ``Saxifraga`` (saxifrage)
- ``Scabiosa`` (scabious plant)
- ``Scadoxus`` (blood lily)
- ``Scaevola``
- ``Schefflera``
- ``Schima``
- ``Schinus``
- ``Schisandra``
- ``Schizachyrium``
- ``Schizanthus``
- ``Schizopetalon``
- ``Schizophragma``
- ``Schizostylis``
- ``Schlumbergera``
- ``Schoenoplectus``
- ``Schomburgkia``
- ``Schotia``
- ``Schwantesia``
- ``Sciadopitys``
- ``Scilla``
- ``Scindapsus``
- ``Scirpoides``
- ``Sclerocactus``
- ``Scoliopsus``
- ``Scopolia``
- ``Scrophularia`` (figwort)
- ``Scutellaria``
- ``Securinega``
- ``Sedum`` (stonecrop)
- ``Selaginella``
- ``Selago``
- ``Selenicereus``
- ``Selinum``
- ``Semele``
- ``Semiaquilegia``
- ``Semiarundinaria``
- ``Sempervivum`` (hens and chicks)
- ``Senecio`` (ragwort)
- ``Senna``
- ``Sequoia`` (coast redwood)
- ``Sequoiadendron`` (giant sequoia)
- ``Seriphidium``
- ``Serissa``
- ``Serruria``
- ``Sesbania``
- ``Sesleria``
- ``Setaria``
- ``Shepherdia``
- ``Shibataea``
- ``Shortia``
- ``Sibiraea``
- ``Sidalcea``
- ``Sideritis`` - Dağ Çayı
- ``Silene`` - Nakıl - (campion)
- ``Silphium``
- ``Silybum``
- ``Simmondsia`` (jojoba)
- ``Sinningia``
- ``Sinocalycanthus``
- ``Sinofranchetia``
- ``Sinojackia``
- ``Sinowilsonia``
- ``Sisyrinchium``
- ``Skimmia``
- ``Smilacina``
- ``Smilax``
- ``Smithiantha``
- ``Smyrnium``
- ``Sobralia``
- ``Solandra``
- ``Solanum`` - Patates - (potato, nightshade)
- ``Soldanella`` (snowbell)
- ``Soleirolia``
- ``Solenopsis``
- ``Solenostemon``
- ``Solidago`` (goldenrod)
- ``Solidaster`` (hybrid genus)
- ``Sollya``
- ``Sonerila``
- ``Sophora``
- ``Sophrolaeliocattleya`` (trigeneric hybrid orchid)
- ``Sophronitis`` (an orchid genus)
- ``Sorbaria``
- ``Sorbus`` - Üvez - (rowan, whitebeam)
- ``Sorghastrum``
- ``Sparaxis``
- ``Sparganium``
- ``Sparrmania``
- ``Spartina`` (cord grass)
- ``Spartium`` - Katırtırnağı - (broom)
- ``Spathiphyllum``
- ``Spathodea``
- ``Sphaeralcea``
- ``Spigelia``
- ``Spiraea`` (spirea)
- ``Sprianthes`` (an orchid genus)
- ``Sporobolus``
- ``Sprekelia``
- ``Stachys`` (betony)
- ``Stachyurus``
- ``Stangeria``
- ``Stanhopea`` (an orchid genus)
- ``Stapelia``
- ``Stapelianthus``
- ``Staphylea`` (bladdernut)
- ``Stauntonia``
- ``Stenanthium``
- ``Stenocactus``
- ``Stenocarpus``
- ``Stenocereus``
- ``Stenomesson``
- ``Stenotaphron``
- ``Stenotus``
- ``Stephanandra``
- ``Stephanocereus``
- ``Stephanotis``
- ``Sternbergia``
- ``Stigmaphyllon``
- ``Stipa``
- ``Stokesia``
- ``Stomatium``
- ``Stratiotes``
- ``Strelitzia`` (bird of paradise )
- ``Streptocarpus`` (Cape primrose)
- ``Streptosolen``
- ``Strobilanthes``
- ``Stromanthe``
- ``Strombocactus``
- ``Strongylodon``
- ``Stuartia``
- ``Stylidium``
- ``Stylophorum``
- ``Styphelia``
- ``Styrax`` - Tespih
- ``Succisa``
- ``Sulcorebutia``
- ``Sutera``
- ``Sutherlandia``
- ``Swainsona``
- ``Swainsonia``
- ``Syagrus``
- ``Sycoparrotia`` (hybrid genus)
- ``Sycopsis``
- ``Symphoricarpos`` (snowberry)
- ``Symphyandra``
- ``Symphytum`` (comfrey)
- ``Symplocos``
- ``Synadenium``
- ``Syneilesis``
- ``Syngonium``
- ``Synnotia``
- ``Synthyris``
- ``Syringa`` - Leylak - (lilac)
- ``Syzygium``
