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| Hypericum Temporal range:
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|---|---|
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| Hypericum perforatum | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Malpighiales |
| Family: | Hypericaceae |
| Tribe: | Hypericeae |
| Genus: | Hypericum L. |
| Species | |
| Synonyms | |
Hypericum /ˌhaɪˈpiːrɪkəm/ 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. All members of the genus may be referred to as St. John's wort, and some are known as goatweed.[3] 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 Raf.[6][7]
Hypericum is unusual for a genus of its size because a worldwide taxonomic monograph[8] was produced for it by Norman Robson (working at the Natural History Museum, London). Robson recognizes 36 sections within Hypericum.
- ^ "Malpighiales". www.mobot.org. Retrieved 2023-06-16.
- ^ Cite error: The named reference
powowas invoked but never defined (see the help page). - ^ a b "Hypericum perforatum (St John's wort)". CABI. 27 September 2018. Retrieved 22 February 2019.
- ^ "Hypericum perforatum L. (St. John's wort)". Natural Resources Conservation Service, US Department of Agriculture. 2019. Retrieved 22 February 2019.
- ^ "Hypericum perforatum (St John's wort)". CABI. 27 September 2018. Retrieved 22 February 2019.
- ^ "Triadenum in Flora of North America @ efloras.org". www.efloras.org. Retrieved 2021-12-15.
- ^ Robson, N. K. (2021). "Studies in the genus Hypericum L.(Hypericaceae) 9. Addenda, corrigenda, keys, lists and general discussion". Phytotaxa. 72: 1–111. doi:10.11646/phytotaxa.72.1.1.
- ^ Hypericum Online