Hypericum calycinum - image Hypericum tetrapterum - Several photographs of Square-stemmed St John’s Wort and some identifying features of the plant. Hypericum androsaemum - Several photographs of Tutsan and some identifying features of the plant. Hypericum pulchrum - Several photographs of leaves and flowers of slender St John’s Wort and its description. Hypericum humifusum - Photograph of Trailing St John’s Wort and a description of the plant. Hypericum spp.: Saint Johnswort - Fact sheet with photos of the leaf, flower, fruit, twig, bark and form. Hypericum hypericoides ssp. hypericoides - St. Andrew's Cross. Hypericum crux-andreae - St. Peterswort. Hypericum perforatum - Photo and profile of common St. Johnswort, with particular focus on its status as a noxious weed in parts of the U.S.