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Flaigg, Norman G.
Triodanis perfoliata (L.) Nieuwl.
Clasping Venus' looking-glass
USDA Symbol: TRPE4
USDA Native Status: Native to U.S.
Wheel-shaped, blue-violet flowers set singly in the axils of leaves that clasp the stem.
This plant also occurs in Mexico. The flowers in the lower leaf axils do not open but nonetheless produce seeds. The genus name, from the Greek treis (three) and odous (tooth), alludes to the three lobes of the calyx in many of the non-opening flowers. This distinctive annual can appear in any open spot, even in cultivated flower gardens. It is sometimes placed in the genus Specularia.
Plant CharacteristicsDuration: Annual Habit: Herb Fruit: Size Class:
Bloom InformationBloom Color: Blue , Purple
Bloom Time: Apr , May
AL , AR , AZ , CA , CO , CT , DC , DE , FL , GA , HI , IA , ID , IL , IN , KS , KY , LA , MA , MD , ME , MI , MN , MO , MS , MT , NC , ND , NE , NH , NJ , NM , NY , OH , OK , OR , PA , RI , SC , SD , TN , TX , UT , VA , VT , WA , WI , WV , WY Canada: ON Native Distribution:
Ontario east to New Brunswick, south to Florida, west to Texas, and north to North Dakota; also in much of West. Native Habitat:
Ditches, Ravines, Depressions, Hillsides, Slopes, Woodlands edge, Opening, Prairie, Plains, Meadows, Pastures, Savannahs USDA Native Status: L48(N), CAN(N)
Growing ConditionsWater Use: Low
Light Requirement: Shade
Soil Moisture: Dry
Soil pH: Circumneutral (pH 6.8-7.2)
Soil Description: Sandy, Sandy Loam, Medium Loam, Clay Loam, Clay, Limestone-based
BenefitUse Ornamental: Attractive, Blooms ornamental
Use Medicinal: Cherokee Indians steeped roots and other parts of plant to make infusion for indigestion.
Deer Resistant: High
Mr. Smarty Plants says
Native plants for dry shade in Austin
March 27, 2007
I live in North Austin, and I'd like to find plants that would work in dry shade. This area does receive a couple of hours of morning sun, and I've had great luck with Hinckley's Columbine. Any o...
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Herbarium Specimen(s)NPSOT 0364
Collected May 2, 1993 in Comal County by Mary Beth White
Wildflower Center Seed BankLBJWC-0104
Collected 2007-05-30 in Travis County by Lady Bird Johnson Wildflower Center
Recommended Species Lists
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Record Modified: 2007-01-01
Research By: LAL