Skimmia
Smilacina
Smilax
Smithiantha
Smyrnium
Sobralia
Solandra
Solanum
Soldanella
Soleirolia
Solenopsis
Solenostemon
Solidago
Solidaster
Sollya
Sonerila
Sophora
Sophrolaeliocattleya
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Sophronitis
Sorbaria
Sorbus
Sorghastrum
Sparaxis
Sparganium
Spartina
Spartium
Spathiphyllum
Spathodea
Sphaeralcea
Spigelia
Spiraea (spirea)
Sporobolus
Sprekelia
Stachys
Stachyurus
Stangeria
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Stanhopea
Stapelia
Stapelianthus
Staphylea
Stauntonia
Stenanthium
Stenocactus
Stenocarpus
Stenocereus
Stenomesson
Stenotus
Stephanandra
Stephanocereus
Stephanotis
Sternbergia
Stigmaphyllon
Stipa
Stokesia
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Stomatium
Stratiotes
Strelitzia
Streptocarpus
Streptosolen
Strobilanthes
Stromanthe
Strombocactus
Strongylodon
Stuartia
Stylidium
Stylophorum
Styphelia
Styrax
Succisa
Sulcorebutia
Sutera
Sutherlandia
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Swainsona
Swainsonia
Syagrus
Sycoparrotia
Sycopsis
Symphoricarpos
Symphyandra
Symphytum
Symplocos
Synadenium
Syneilesis
Syngonium
Synnotia
Synthyris
Syringa
Syzygium
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