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Triadenum

From Wikipedia, the free encyclopedia

Triadenum
Triadenum virginicum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Hypericaceae
Tribe: Cratoxyleae
Genus: Triadenum
Raf.
Type species
T. fraseri
(Spach) Gleason
Synonyms[1]
  • Gardenia Colden
  • Hypericum L. sect. Elodea Choisy

Triadenum, known as marsh St. John's worts,[2] is a small genus of flowering plants in the family Hypericaceae. The genus is characterized by opposite, blunt-tipped leaves and pink flowers with 9 stamens. They are distributed in North America and eastern Asia.

Acceptance of this genus is varied. Kew's Plants of the World Online[3] and the Database of Vascular Plants of Canada (VASCAN)[4] treat it as a junior synonym of Hypericum and the Flora of North America[1] and Flora of China[5] treat it as separate. The situation arises from B. R. Ruhfel et al. (2011)'s genetic study describing Triadenum as subsumed under Hypericum and later genetic results disagreeing with this assessment.[6] Under Hypericum, the species are mostly treated as the section Hypericum sect. Elodea.[7]

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Transcription

Species

Triadenum contains the following 6 species according to Flora of North America and Flora of China:[1][5]

References

  1. ^ a b c "Triadenum in Flora of North America @ efloras.org". www.efloras.org. Retrieved 2021-12-15.
  2. ^ USDA, NRCS (n.d.). "Triadenum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 14 December 2015.
  3. ^ "Triadenum Raf". Plants of the World Online.
  4. ^ "Triadenum". VASCAN. Retrieved 17 June 2022.
  5. ^ a b "Triadenum in Flora of China @ efloras.org". www.efloras.org.
  6. ^ 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.
  7. ^ Robson, Norman K.B. (11 April 2016). "And then came molecular phylogenetics—Reactions to a monographic study of Hypericum (Hypericaceae)". Phytotaxa. 255 (3): 181. doi:10.11646/phytotaxa.255.3.1.


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This page was last edited on 14 October 2023, at 02:47
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