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Dr. Duke's Phytochemical and Ethnobotanical databases facilitate in-depth plant, chemical, bioactivity, and ethnobotany searches using scientific or common names. Search results can be downloaded in PDF or spreadsheet form. Of interest to pharmaceutical, nutritional, and biomedical research, as well alternative therapies and herbal products.

Key: A= Biological Activity C= Chemical E= Ethnobotany Plant P= Plant S= Syndrome U= Ethnobotany Use
P Stachys officinalis (Betony; Bishop's-Wort; Purple Betony; Wood Betony)
P Stevia rebaudiana (Ca-A-E; Stevia; Sweet Leaf of Paraguay)
P Strophanthus gratus (Ouabain)
P Strophanthus hispidus (Hispid Ouabain)
P Styrax benzoin (Benzoin; Onycha; Styrax)
P Symphytum officinale (Comfrey)
P Syzygium malaccense (Malay Apple; Mammey Pomorrosa; Ohia)
P Taraxacum officinale (Dandelion)
P Thevetia neriifolia (Yellow oleander)
P Thevetia peruviana (Adelfa Amarilla (Sp.); Cabalonga (Sp.); Chirca (Sp.); Loandro-Amarelo (Port.); Luckynut; Oleandre Jaune (Fr.); Peruvian )
P Thuja occidentalis (Arbor-Vitae; Northern White-Cedar)
P Thymus capitatus ('Sicilian' Thyme; Spanish Origanum; Spanish Thyme)
P Thymus orospedanus (Orosped Thyme)
P Urginea indica (Indian Squill; Sea-Onion)
P Valeriana officinalis (Common Valerian; Garden-Heliotrope; Valerian)
P Verbena officinalis (Vervain)