sandalwood (Santalum)
sarsaparilla (Aralia) [N.A. native] or (Smilax) [nonnative]
sea island cotton (Gossypium barbadense)
silverrod (Solidago bicolor)
silver star; silver stars (Cryptanthus lacerdae)
slipperwort or figwort (Hybanthus verticillatus var. verticillatus)
sphagnum peat moss or peat moss [first is preferred reference]
Stella d’Oro daylily
St. John’s wort
sugarcane (Saccharum)
sweet flag (Acorus calamus)
sweetsop (Annona squamosa)
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