Triadenum, the marsh St. Johnsworts is a genus of flowering plants in the family Hypericaceae or Clusiaceae. The genus is characterized by opposite, blunt-tipped leaves and pink flowers with 9 stamens.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0