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Hypericum androsaemum exhibits both physiological dormancy and chemical dormancy, meaning that seed germination can be kickstarted by both physical and chemical factors. In particular, room-temperature water or the plant hormone gibberellic acid are most effective at bringing its seeds out of a dormant state.
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 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.
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]
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 foliosum, the shining St John's wort, is a species of flowering plant in the family Hypericaceae. It is a bushy shrub endemic to the Portuguese Azores Islands with golden yellow petals and many stems. The species was described by William Aiton in 1789 and was later placed into section Androsaemum of the genus Hypericum by Norman Robson in