Sherardia arvensis. Field madder. Stabwort - Wood sorrel, Oxalis acetosella. Staggerwort - Same as Staverwort . Staithwort - Same as colewort. Standerwort - Standergrass, Orchis mascula. Starwort - Any plant of the genus Aster. Staverwort - Staggerwort; ragwort, Jacobaea vulgaris. Stinkwort – Various plants including Helleborus foetidus, the stinking hellebore; Dittrichia graveolens and Inula graveolens; and Datura stramonium, jimson weed. Stitchwort - Any of several plants of the genus Stellaria. Stichwort. St. James' Wort - Senecio jacobaea or Senecio aureus, two species of ragwort. St. John's Wort - Can refer to any species of Hypericum. Stonewort - A general name for plants of the genus Chara and Nitella; water horsetail. St. Paul's Wort – species of the genus Sigesbeckia, such as Eastern St Paul's-wort, Sigesbeckia orientalis. St. Peter's Wort - Any plant of the genus Ascyrum, such as Hypericum quadrangulum. The cowslip. Strapwort - Corrigiola litoralis. Sulphurwort - Peucedanum officinale. Hog fennel. Swallowwort - The Greater Celandine, Chelidonium majus. Also, any plant of the genus Asclepias or Cynanchum. Black Swallow-wort is Vincetoxicum nigrum. Sweetwort - Any plant of a sweet taste. Talewort - Borago officinalis. Formerly considered a valuable remedy. Tetterwort - According to 1913 Webster's Dictionary, Chelidonium majus in England or Sanguinaria canadensis in the Americas. Used to treat tetter. Thoroughwort - Eupatorium perfoliatum. Boneset. Throatwort - A name for one or two plants of the genus Campanula. Thrumwort - Amaranthus caudatus; velvet flower or love-lies-bleeding. Toothwort - Cardamine, Lathraea squamaria, and Lathraea clandestina Towerwort - the tower mustard and some allied species of Arabis. Tree lungwort - Lobaria pulmonaria, a lichen. Trophywort - The Indian cress; nasturtium, Tropaeolum majus. Venus's-navelwort - Either blue navelwort or white navelwort. Wall Pennywort - Umbilicus rupestris. Wartwort - Euphorbia helioscopia An attractive European weed which has flowers that turn towards the sun. Water dropwort - Any plant in the Oenanthe genus, so-called because of the resemblance of some species to dropwort, Filipendula vulgari (see above). Water figwort - Water betony. Water pennywort - Hydrocotyle; marsh pennyworts. Water starwort - Callitriche verna, of the water-milfoil family, and other species of the genus Callitriche, such as Common Water-starwort, Callitriche stagnalis. Waterwort - An aquatic plant of the genus Elatine. Any plant of the family Philydraceae. White navelwort - A plant of the genus Omphalodes. White Swallowwort - Vincetoxicum officinale. Willowwort - Any plant of the willow family, Salicaceae. A species of Lythrum. Grasspoly; a