Triodanis is a genus of flowering plants within the family Campanulaceae, native to North and South America.[1][2][3] Venus' looking-glass is a common name for plants in this genus.[4]

Specularia perfoliata 3.jpg
Triodanis perfoliata
Scientific classification e
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Campanulaceae
Subfamily: Campanuloideae
Genus: Triodanis
Raf. ex Greene
  • Campylocera Nutt.
  • Dysmicodon (Endl.) Nutt.

Species include:

  • Triodanis biflora (Ruiz & Pav.) Greene - small Venus' looking-glass - widespread across North America
  • Triodanis coloradoensis (Buckley) McVaugh - Colorado Venus' looking-glass - endemic to Texas despite the name
  • Triodanis holzingeri McVaugh - Holzinger's Venus' looking-glass - Great Plains plus Arizona and Tennessee
  • Triodanis lamprosperma McVaugh - Prairie Venus' looking-glass - southern Great Plains
  • Triodanis leptocarpa (Nutt.) Nieuwl. - Slimpod Venus' looking-glass - Great Plains
  • Triodanis perfoliata (L.) Nieuwl. - Clasping Venus' looking-glass - widespread across North and South America from Canada to Argentina; naturalized in China, Korea, Australia
  • Triodanis texana McVaugh - Texas Venus' looking-glass - endemic to Texas


  1. ^ a b Kew World Checklist of Selected Plant Species
  2. ^ Lammers, T.G. (2007). World checklist and bibliography of Campanulaceae: 1-675. The Board of Trustees of the Royal Botanic Gardens, Kew.
  3. ^ Biota of North America Program, 2013 county distribution maps
  4. ^ "Triodanis". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 15 December 2015.

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