Triodanis perfoliata, the clasping Venus' looking-glass or clasping bellflower, 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.
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' ...
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*All information is based on published scientific research