Benghal dayflower

Commelinales > Commelinaceae > Commelina benghalensis L.
Synonym(s): tropical spiderwort, jio

Benghal dayflower, or tropical spiderwort, is an annual or perennial, creeping herb that is on the Federal Noxious Weed List. Leaves are alternate, lily-like, 1.2-2.8 in. (3-7 cm) long and often have reddish hairs towards the tip. Aboveground flowers are very small with relatively large lilac to blue petals and are present from the spring into the fall. Underground flowers, which grow on burrowing rhizomes, are white and very small. Benghal dayflower invades areas with moist soil including roadsides, grasslands and other disturbed areas. It is especially problematic in pastures and crop fields where it forms dense, pure stands that can smother other plants such as low-growing crops. Benghal dayflower is native to Asia and Africa and was first found in the United States in 1963.


Identification, Biology, Control and Management Resources


Selected Images from Invasive.org

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Seedling(s);
Theodore Webster, USDA Agricultural Research Service, Bugwood.org
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Seedling(s);
Stanley Culpepper, University of Georgia, Bugwood.org
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Feature(s); The underground flowers appear as swollen nodes. Thomas County, GA
Byron Rhodes, University of Georgia, Bugwood.org
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Feature(s); The underground flowers appear as swollen nodes. Thomas County, GA
Byron Rhodes, University of Georgia, Bugwood.org
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Feature(s); Red hairs on leaf sheath
Herb Pilcher, USDA Agricultural Research Service, Bugwood.org
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Foliage; Close-up of foliage
Stanley Culpepper, University of Georgia, Bugwood.org
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Flower(s); Thomas County, GA
Byron Rhodes, University of Georgia, Bugwood.org
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Flower(s); Aerial flower
Herb Pilcher, USDA Agricultural Research Service, Bugwood.org
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Flower(s); Double flower in profile
Theodore Webster, USDA Agricultural Research Service, Bugwood.org
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Infestation; Thomas County, GA
Byron Rhodes, University of Georgia, Bugwood.org
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Infestation; Infestation in harvested cotton field. Cairo, Georgia. 2001
Stanley Culpepper, University of Georgia, Bugwood.org
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Infestation; Large infestation in cotton field
Stanley Culpepper, University of Georgia, Bugwood.org
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Infestation; Infestation in cotton field. Grady county, Georgia. 2002
Stanley Culpepper, University of Georgia, Bugwood.org
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Infestation; Large infestation
Stanley Culpepper, University of Georgia, Bugwood.org
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Infestation; close up of Bengal dayflower in cotton
Theodore Webster, USDA Agricultural Research Service, Bugwood.org
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Infestation; Bengal dayflower with peanut in lower right corner
Theodore Webster, USDA Agricultural Research Service, Bugwood.org
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Infestation; Peanuts infested with Bengal dayflower (2 wks after planting)
Theodore Webster, USDA Agricultural Research Service, Bugwood.org
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Infestation; in peanut 6 weeks into the season
Theodore Webster, USDA Agricultural Research Service, Bugwood.org
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Seed(s); seed recovered from gut contents of dove
Theodore Webster, USDA Agricultural Research Service, Bugwood.org
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Invasive Reference(s):

Check Invasive.org for most current lists.
  • Federal Noxious Weed List
  • California - Noxious Weed Law
  • Georgia - EPPC list
  • Massachusetts - Noxious Weed Law
  • Mississippi - Noxious Weed Law
  • North Carolina - Noxious Weed Law
  • Oregon - Noxious Weed Law
  • South Carolina - EPPC List
  • South Carolina - Noxious Weed Law
  • Tennessee - Noxious Weed Law
  • Vermont - Noxious Weed Law
  • Invasive Plant Atlas of the Mid-South


External Links


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USDA Forest Service Bugwood University of Georgia