- stipuliform
- stock
- strawberry tomato
- strawberry-tree
- strigose
- strigous
- strobile
- styroceous
- suberin
- subramose
- succulency
- sugar-maple
- sulphureous
- sultana
- sumach
- sundew
- sunn
- string-bean
- strumae
- strumose
- styrax
- submerse
- sumac
- struma
- stung
- submersed
- succory
- succulent
- sucker
- style
- styracaceous
- supertuberation
- supple-jack
- surculose
- surculous
- succulence
- sunflower
- superior
- superiorly
- swallow-wort
- swan-flower
- swede
- sweet gale
- sweet pea
- sweet-briar
- sweet-brier
- sweet-sop
- sweeting
- swine-bread
- sycamine
- syconium
- syringa
- systylous
- tamarind
- tang
- sword-lily
- sympatalous
- syncarpous
- tamarack
- tamarisk
- tangle
- tap-root
- tarasxcum
- tassel
- teak
- teasel
- teazel
- teazle
- sycamore
- sychnocarpous
- syncarp
- tagetes
- tansy
- taraxacum
- tare
- taro
- tarragon
- tendril
- tentacle
- tentacled
- tentacular
- teo-cleft
- terraneous
- ternate
- testaceous
- testacious
- tetrastyle
- thallus
- tetramerous
- tetrapetalous
- thermotropism
- thyme
- tiller
- thistle
- thrift
- timothy
- toadflax
- tobacco
- tobacco-plant
- tomenta