wide (2.5 cm), from early to late summer. Hypericum perforatum St. John's Wort St. John's Wort is a perfect example of why common names need to be verified with a botanic name. 1 Sources and Composition 1.1 Composition St. John's wort (SJW) refers to a plant by the botanical name of hypericum perforatum (of the family hypericaceae), with this species in particular being called Common St. John's wort or Perforate St. John's wort to distinguish it from other species in the plant genus of hypericum which all share the common name of St. John's wort. 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that occurs on rocky ground, dry wooded slopes, uncultivated fields, gravel bars … Version 1 of The Plant List has been superseded. Buy Hypericum Calycinum – Rose of Sharon for only £ 3.99 excluding shipping costs (orders over GBP99,99 will be deliverd without shipping costs) throughout the whole United Kingdom! Virtually all of the features of the old searches are still available and in addition we have added several new features to create a more comprehensive and user friendly search experience. John's wort has been used in alternative medicine as a likely effective aid in treating mild to moderate depression and related symptoms such as anxiety or insomnia. Media in category "Hypericum perforatum" The following 200 files are in this category, out of 233 total. St. Johns Wort (a native of Europe) occurs commonly along roadsides and hedgerows, and this herb has one of the most glamorous histories in the plant kingdom.