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Hypericum androsaemum, the shrubby St. John's wort, is a flowering plant in the family Hypericaceae.Commonly called tutsan or sweet-amber, the species is cultivated as an ornamental plant because of its striking red-tinted foliage, bright yellow petals, and its large clusters of fruit.
Androsaemum, commonly called tutsan, is a section of flowering plants in the family Hypericaceae. It is made up of Hypericum androsaemum (its type species ), H. foliosum , H. grandifolium , and H. hircinum , as well as the hybrid H. × inodorum .
Hypericum / ˌ h aɪ ˈ p iː r ɪ k əm / is a genus of flowering plants in the family Hypericaceae (formerly considered a subfamily of Clusiaceae). [3] [4] The genus has a nearly worldwide distribution, missing only from tropical lowlands, deserts and polar regions. [5] Many Hypericum species are regarded as invasive species and noxious weeds.
Hypericum sect. Androsaemum, commonly called tutsan, is a section of flowering plants in the family Hypericaceae. It is made up of Hypericum androsaemum (its type species), H. foliosum, H. grandifolium, and H. hircinum, as well as the hybrid H. × inodorum. Members of the section are deciduous shrubs of medium size.
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The genus Hypericum contains approximately 500 species which are divided into 36 sections as described by botanist Norman Robson. [2] This division into distinct sections is largely due to the fact that a genus-wide monograph was performed by Robson in 1977, which allowed for a comprehensive analysis of the genus's taxonomy. [3]
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The genus Hypericum contains a number of nothospecies, or hybrids created directly from crossing two accepted species to create an intermediate organism that shares properties of both. Many of these hybrid species are used as ornamental or decorative plants.