One of the most well-known species is the common, or perforated, Saint-John’s-wort (H. perforatum), which is native to Europe, northern Africa, and western Asia. Brown seed pods form in September and remain on the plant all winter. Hypericum prolificum, commonly called shrubby St. John's wort, is a Missouri native plant that occurs on rocky ground, dry wooded slopes, uncultivated fields, gravel bars along streams and in low, moist valleys. Native Range: Central and eastern North America, Tolerate: Drought, Erosion, Clay Soil, Black Walnut. Updates? St. Johns Wort is a perennial flowering plant native to many parts of Europe and the U.S. Corrections? St. John’s wort is the best-known midsummer plant. The common name stems from the fact that various European species flower around June 24, which is the feast day of St. John the Baptist; “wort” derives from an Old English word for herb or plant. Each stem is light green, glabrous, 4-angled, and slightly winged on the angles. It is an aggressive weed that grows in the dry ground of roadsides, meadows, woods, and hedges. Cone-shaped seed capsules split in autumn to release black seeds. Seed pods can be used in dried floral arrangements. They characteristically feature many stamens, which are often united in bundles. Summer rains are particularly effective in allowing the plant to grow vegetatively, following defoliation by insects or grazing. St. John’s wort is native to Europe, West Asia, North Africa, Madeira and the Azores, and is naturalized in many parts of the world, notably North America and Australia. Roadside infestations have become a common sight. But, given it is a shrub, and a perennial, plan on pampering your young plants for at least 3 years, possibly more, before you start seeing blooms. It has become a noxious invasive species in southern Australia, South Africa, and North and South America. A landscape workhorse, St. John’s wort is a champion at providing food and shelter to wildlife—especially pollinators—as well as adding blossoms, colorful foliage, and great texture to entry gardens, foundation plantings, perennial beds, and mixed shrub borders. Creeping Saint-John’s-wort bears pale yellow flowers with orange stamens on 30-cm- (1-foot-) tall plants, while goldencup Saint-John’s-wort has slightly smaller deep yellow flowers with darker stamens. Roundpod St. John's-wort, also spelled St. Johnswort, is a Florida native found throughout the state, and a farily common one at that. Although not native to Australia and long considered a weed, St. John’s wort is now grown there as a crop, and today Australia produces 20 percent of the world’s supply. Shrubby St. John's wort is a low to medium-sized native shrub reaching 3 to 4 feet high. Tolerates wide range of soils, including dry rocky or sandy soils. Can be grown as a hedge. St. John’s wort (Hypericum perforatum) is a flowering plant. It has been used for centuries for its pharmacologic properties in fighting depression, insomnia and anxiety, and for promoting weight loss. A dense little shrub with stiff erect stems and forest green leaves. The plant spreads asexually by creeping rhizomes and readily reseeds itself with seeds that can persist for years in the soil seed bank. Stamens are bushy to the point of partially obscuring the petals (hence the species name of prolificum which refers to the stamens). Basic Description. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Great St. John's Wort ~ Hypericum ascyron (pyramidatum) Great St. John's Wort is the showiest Hypericum species in the midwest.The large bright yellow, 5 parted flowers are over 2" in width. 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