Hypericum prolificum, known as shrubby St. John's wort, is a deciduous shrub in the genus Hypericum. It was named for its "prolific" number of stamens. Description Hypericum prolificum is a shrub growing up to tall with elliptic to oblanceolate leaves up to long and broad. The flowerheads have between 1 and 9 flowers, each across with 5 golden yellow petals and numerous stamens. The ovary is usually three-parted, though may have up to five parts in some individuals. Distribution and habitat Hypericum prolificum is native to the central and eastern United States and Ontario. Habitats include riparian areas, slopes, thickets, swamp edges, and oak woodlands. Gallery References prolificum Flora of North America