Hypericum

For the racehorse, see Hypericum (horse).

Hypericum
Temporal range: Eocene - recent[1]
Hypericum perforatum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Hypericaceae
Tribe: Hypericeae
Genus: Hypericum
L.
Species

c. 510[2]

Synonyms
List

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.

  1. ^ "Malpighiales". www.mobot.org. Retrieved 2023-06-16.
  2. ^ Cite error: The named reference powo was invoked but never defined (see the help page).
  3. ^ a b "Hypericum perforatum (St John's wort)". CABI. 27 September 2018. Retrieved 22 February 2019.
  4. ^ "Hypericum perforatum L. (St. John's wort)". Natural Resources Conservation Service, US Department of Agriculture. 2019. Retrieved 22 February 2019.
  5. ^ "Hypericum perforatum (St John's wort)". CABI. 27 September 2018. Retrieved 22 February 2019.
  6. ^ "Triadenum in Flora of North America @ efloras.org". www.efloras.org. Retrieved 2021-12-15.
  7. ^ 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.
  8. ^ Hypericum Online