Editing Hypericum (section)

{{Short description|Genus of flowering plants known as St. John's worts}}
{{For|the racehorse|Hypericum (horse)}}
{{Automatic taxobox
| fossil_range = {{fossilrange|40.4|0|[[Eocene]] - recent|ref=<ref name=mobot>{{Cite web |title=Malpighiales|url=https://mobot.org/MOBOT/research/APweb/orders/malpighialesweb.htm|access-date=2023-06-16 |website=www.mobot.org}}</ref>}}
| image = Saint John's wort flowers.jpg
| image_caption = ''[[Hypericum perforatum]]''
| taxon = Hypericum
| authority = [[Carl Linnaeus|L.]]
| subdivision_ranks = Species
| subdivision = [[List of Hypericum species|{{circa|lk=n}} 510]]{{r|powo}}
| synonyms = {{collapsible list
|''Adenotrias'' <small>[[Jaub.]] & [[Édouard Spach|Spach]]</small>
|''Androsaemum'' <small>[[Henri-Louis Duhamel du Monceau|Duhamel]]</small>
|''Androsemum'' <small>[[Johann Heinrich Friedrich Link|Link]]</small>
|''Ascyrum'' <small>[[Carl Linnaeus|L.]]</small>
|''Lianthus'' <small>[[Norman Robson (botanist)|N.Robson]]</small>
|''Olympia'' <small>[[Édouard Spach|Spach]]</small>
|''Sanidophyllum'' <small>[[John Kunkel Small|Small]]</small>
|''Santomasia'' <small>N.Robson</small>
|''Sarothra'' <small>[[Carl Linnaeus|L.]]</small>
|''Takasagoya'' <small>[[Y.Kimura]]</small>
|''Triadenia'' <small>[[Édouard Spach|Spach]]</small>
}}
}}

'''''Hypericum''''' {{IPAc-en|ˌ|h|aɪ|ˈ|p|iː|r|ᵻ|k|əm}} is a [[genus]] of [[flowering plant]]s in the [[family (biology)|family]] [[Hypericaceae]] (formerly considered a subfamily of [[Clusiaceae]]).<ref name="cabi">{{cite web |title=''Hypericum perforatum'' (St John's wort) |url=https://www.cabi.org/isc/datasheet/28268 |publisher=CABI |access-date=22 February 2019 |date=27 September 2018}}</ref><ref name="usda">{{cite web |title=''Hypericum perforatum'' L. (St. John's wort) |url=https://plants.usda.gov/core/profile?symbol=HYPE |publisher=Natural Resources Conservation Service, US Department of Agriculture |access-date=22 February 2019 |date=2019}}</ref>  The genus has a nearly worldwide distribution, missing only from [[tropical]] lowlands, [[deserts]] and [[polar region]]s.<ref name="cabi2">{{cite web|url=https://www.cabi.org/isc/datasheet/28268|title=''Hypericum perforatum'' (St John's wort)|date=27 September 2018|publisher=CABI|access-date=22 February 2019}}</ref> Many ''Hypericum'' species are regarded as [[invasive species]] and [[noxious weed]]s.  All members of the genus may be referred to as '''St. John's wort''', and some are known as '''goatweed'''.<ref name="cabi" /> The white or pink flowered marsh St. John's worts of North America and eastern Asia are generally accepted as belonging to the separate genus ''[[Triadenum]]'' <small>Raf.</small><ref>{{Cite web|title=Triadenum in Flora of North America @ efloras.org|url=http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=133357|access-date=2021-12-15|website=www.efloras.org}}</ref><ref>{{Cite journal|last=Robson|first=N. K.|date=2021|title=Studies in the genus Hypericum L.(Hypericaceae) 9. Addenda, corrigenda, keys, lists and general discussion.|url=https://www.biotaxa.org/Phytotaxa/article/view/phytotaxa.72.1.1|journal=Phytotaxa|volume=72|pages=1–111|doi=10.11646/phytotaxa.72.1.1|url-access=subscription}}</ref>

''Hypericum'' is unusual for a genus of its size because a worldwide taxonomic [[monograph]]<ref name="hypericum online2">[http://hypericum.myspecies.info/ Hypericum Online]</ref> was produced for it by [[Norman Robson (botanist)|Norman Robson]] (working at the [[Natural History Museum, London]]). Robson recognizes 36 sections within ''Hypericum''.