Hypericum tubulosum

Hypericum tubulosum, the lesser marsh St. Johnswort or southern marsh St. John's-wort, is a species of flowering plant in the family Hypericaceae.[2][3] Formerly classified as synonym Triadenum tubulosum,[1] the species is found across the Southern United States and Midwest.[3] It grows in wetlands such as bogs and floodplains.[2][4]

Hypericum tubulosum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Hypericaceae
Genus: Hypericum
Species:
H. tubulosum
Binomial name
Hypericum tubulosum
Walter
Synonyms[1]
  • Triadenum tubulosum (Walter) Gleason
  • Triadenum longifolium Small

Description
Flower detail

Lesser marsh St. Johnswort is a perennial herb that grows to approximately 32 inches (81 cm) tall. Its pink flowers bloom in August and September.[4]

The seeds of H. tubulosum closely resemble those of the extinct paleospecies Hypericum tertiaerum.[5]

References
  1. "Hypericum tubulosum Walter". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2020-10-01.
  2. Weakley, Alan S. (2018), Flora of the Southern and Mid-Atlantic States, working draft of 20 August 2018, University of North Carolina Herbarium, North Carolina Botanical Garden, University of North Carolina at Chapel Hill
  3. "Plants Profile for Triadenum tubulosum (lesser marsh St. Johnswort)". plants.usda.gov. Retrieved 2020-09-30.
  4. "Lady Bird Johnson Wildflower Center - The University of Texas at Austin". www.wildflower.org. Retrieved 2020-09-30.
  5. Meseguer, Andrea S.; Sanmartín, Isabel (30 June 2012). "Paleobiology of the genus Hypericum (Hypericaceae): a survey of the fossil record and its palaeogeographic implications". Anales del Jardín Botánico de Madrid. 69 (1): 97–106. doi:10.3989/ajbm.2306. hdl:10261/167029. ISSN 1988-3196.


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