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| Genus species | Habit [ Bloom Color(s) ] | Common Name |
| Silphium perfoliatum | Cupplant | |||
| Sisyrinchium angustifolium | Blue-eyed Grass | |||
| Smilaceana racemosa | False Solomon's Seal | |||
| Solidago caesia | Woodland Goldenrod | |||
| Solidago curtisii | Curtiss' Goldenrod | |||
| Solidago nemoralis | Grey Goldenrod | |||
| Solidago odora | Sweet Goldenrod | |||
| Solidago pinetorum | Early Goldenrod | |||
| Solidago rugosa | Rough-leaved Goldenrod | |||
| Solidago sempervirens | Seaside Goldenrod | |||
| Solidago speciosa | Showy Goldenrod | |||
| Solidago sphacelata | False Goldenrod | |||
| Spigelia marilandica | Indian Pink | |||
| Stokesia laevis | Stokes' Aster | |||
| Stylophorum diphyllum | Celandine Poppy | |||
| Thalictrum tenolutum | Tall Meadow Rue | |||
| Thermopsis villosa | Carolina Bushpea | |||
| Tiarella cordifolia v. collina | Foamflower (clump) |