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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 ?
Among outdoor plants in colder regions, dayflowers' best known relatives are spiderworts.
Spiderworts look much like dayflowers, except the flowers are larger and have only two petals.
Like dayflowers, spiderworts can spread aggressively.