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see spiderwortspiderwort,
common name for some members of the Commelinaceae, a family of tropical and subtropical succulent herbs found especially in Africa and the Americas. Species of the spiderworts (genus Tradescantia) and the dayflowers (genus Commelina
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(Commelina communis), an annual herbaceous plant with dark blue flowers. The dayflower is a quarantine weed.

References in periodicals archive ?
Carl von Linnaeus, the founder of our system of plant nomenclature, gave dayflowers the botanical name Commelina to honor two 18th-century Dutch brothers who were stars in botany at the time.
The slopes are often lush with grass and wildflowers in late summer and early fall, including the bright scarlet blooms of shrubby mountain sage, prolific blue dayflowers, and the candelabra-shaped yellow-flowered stalks of agaves.
Yoshida and her co-workers studied blue dayflowers, cornflowers, and salvia, which are blue despite the fact that the pigment cell sap of their petals is weakly acidic.