Triodanis perfoliata

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Clasping Venus's Looking Glass
Specularia perfoliata 3.jpg
Triodanis perfoliata
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Campanulaceae
Genus: Triodanis
Species: T. perfoliata
Binomial name
Triodanis perfoliata
(L.) Nieuwl.
  • Campanula perfoliata L.
  • Legousia perfoliata (L.) Britton
  • Prismatocarpus perfoliatus (L.) Sweet
  • Pentagonia perfoliata (L.) Kuntze
  • Dysmicodon perfoliatum (L.) Nutt
  • Specularia perfoliata (L.) A.DC.

Triodanis perfoliata, the Clasping Venus's Looking Glass, is a flowering plant belonging to the family Campanulaceae. It is an annual herb native to North and South America, the natural range extending from Canada to Argentina. It is also naturalized in China, Korea and Australia.[1][2][3][4][5][6]


The flowers are wheel-shaped or bell-shaped and violet blue. They have 5-lobed corollas and are radially symmetrical. The leaves are 1/4-1" wide, are scallop-edged and shell-shaped. The plant is 6-18" high and flowers from May to August. It produces a small, many seeded capsule for fruit.


  1. ^ a b Kew World Checklist of Selected Plant Families
  2. ^ Flora of China v 19 p 552, 穿叶异檐花 chuan ye yi yan hua, Triodanis perfoliata (Linnaeus) Nieuwland, Amer. Midl. Naturalist. 3: 192. 1914.
  3. ^ Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies. Smithsonian Contributions to Botany 98: 1-1192.
  4. ^ Lammers, T.G. (2007). World checklist and bibliography of Campanulaceae: 1-675. The Board of Trustees of the Royal Botanic Gardens, Kew.
  5. ^ Theiret, John (2001). "North American Wildflowers", Alfred A. Knopf Inc.
  6. ^ Flora Bonaerense, Plantas y Hongos de la Provincia de Buenos Aires, Argentina, (Triodanis perfoliata)

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