Rock Harlequin - Corydalis sempervirens
Rose Mallow Hibiscus - Hibiscus moscheutos
Rosinweed - Silphium integrifolium
Sarsaparilla, Wild - Aralia nudicaulis
Shrubby Cinquefoil - Dasiphora fruticosa
Shrubby St. John's Wort - Hypericum prolificum
Solomon Seal - Polygonatum biflorum
Solomon Seal, False - Maianthemum racemosum
Solomon Seal, Starry - Maianthemum stellatum
Spicebush - Lindera benzoin
Spiderwort - Tradescantia ohiensis
Spotted Bee Balm - Monarda punctata
Spreading Dogbane - Apocynum androsaemifolium
Starflower - Lysimachia borealis
Steeplebush - Spiraea tomentosa
Sunchoke - Helianthus tuberosus
Sundrops - Oenothera perennis
Sunflower, Giant/Tall - Helianthus giganteus
Sunflower, Paleleaf - Helianthus strumosus
Sunflower, Early - Heliopsis helianthoides
