Page author: David Giblin
Triodanis perfoliata
clasping-leaf Venus'-looking-glass
WTU specimens
Other herbaria

Distribution: Both sides of the Cascades in Washington; throughout much of the United States and adjacent areas of Canada and Mexico.

Habitat: Various habitats, from the valleys and plains to moderate elevations in the moutains.

Flowers: May-August

Origin: Native

Conservation Status: Not of concern

Description:
General:

Erect annual herbs, the stems erect, usually simple, 1-6 dm. tall, the surface rough.

Leaves:

Leaves alternate, sessile, cordate-clasping, rotund-ovate, palmately veined, the leaves 0.5-3 cm. long and wide, or the lowermost ones narrower, more obovate, and short-petiolate.

Flowers:

Flowers sessile in the axils of the middle and upper leaves, 1-several in each axil, in a leafy, spike-like arrangement; calyx lobes 5, divided to the base, narrowly triangular and pointed, 5-8 mm. long; corolla united, regular, the 5 lobes longer than the tube, 8-13 mm, long, deep purple to pale lavender; stamens 5, free from the corolla and from each other; the lower flowers do not open and the calyx of these is smaller and 3- or 4-lobed; ovary inferior.

Fruits:

Capsules oblong, 2- or 3-celled, about 1 cm. long in the open flowers, half that size in the others.

Accepted Name:
Triodanis perfoliata (L.) Nieuwl.
Publication: Amer. Midl. Naturalist 3(7): 192. 1914.

Synonyms & Misapplications:
Legousia perfoliata (L.) Britton
Specularia perfoliata (L.) A. DC.
Additional Resources:

PNW Herbaria: Specimen records of Triodanis perfoliata in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Triodanis perfoliata checklist entry.

E-Flora BC: Triodanis perfoliata atlas page.

CalPhotos: Triodanis perfoliata photos.

USDA Plants: Triodanis perfoliata information.

24 photographs:
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