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|image_caption=Hypericum calycinum cv. 'Hidcote'

|image_caption=Hypericum calycinum cv. 'Hidcote'

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'''''Hypericum''''' ({{pron-en|ˌhaɪˈpɪərɨkəm}})<ref>''Sunset Western Garden Book,'' 1995:606–607</ref> is a [[genus]] of about 400 [[species]] of [[flowering plant]]s in the [[family (biology)|family]] [[Clusiaceae]], [[subfamily]] [[Hypericoideae]] (formerly often considered a full family Hypericaceae).  

'''''Hypericum''''' is a [[genus]] of about 400 [[species]] of [[flowering plant]]s in the [[family (biology)|family]] [[Clusiaceae]], [[subfamily]] [[Hypericoideae]] (formerly often considered a full family Hypericaceae).  

The genus has a nearly worldwide distribution, missing only from [[tropical]] lowlands, [[deserts]] and [[polar]] regions. All members of the genus may be referred to as '''St. John's-wort''', though they are also commonly just called '''hypericum''', and some are known as '''tutsan'''. The marsh St. John's-worts are nowadays separated in ''[[Triadenum]]''.

The genus has a nearly worldwide distribution, missing only from [[tropical]] lowlands, [[deserts]] and [[polar]] regions. All members of the genus may be referred to as '''St. John's-wort''', though they are also commonly just called '''hypericum''', and some are known as '''tutsan'''. The marsh St. John's-worts are nowadays separated in ''[[Triadenum]]''.