Hypericum tubulosum explained

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

Description

Lesser marsh St. Johnswort is a perennial herb that grows to approximately 32inches tall. Its pink flowers bloom in August and September.

The seeds of H. tubulosum closely resemble those of the extinct paleospecies Hypericum tertiaerum.^[4]

Notes and References

1. Web site: Hypericum tubulosum Walter . Plants of the World Online . Royal Botanic Gardens, Kew. 2020-10-01 .
2. Web site: Plants Profile for Triadenum tubulosum (lesser marsh St. Johnswort). 2020-09-30. plants.usda.gov.
3. Web site: Lady Bird Johnson Wildflower Center - The University of Texas at Austin. 2020-09-30. www.wildflower.org.
4. Meseguer . Andrea S. . Sanmartín . Isabel . 30 June 2012 . Paleobiology of the genus Hypericum (Hypericaceae): a survey of the fossil record and its palaeogeographic implications . . 69 . 1 . 97–106 . 10.3989/ajbm.2306 . 1988-3196 . free. 10261/167029 . free .