- Commelina benghalensis, 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.
- Fruits are ovoid capsules.
- Ecological Threat
- Commelina benghalensis 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. Commelina benghalensis is native to Asia and Africa and was first found in the United States in 1963.
- Domestic Programs Pest Evaluation - USDA APHIS PPQ
- Federal Noxious Weed Inspection Guide - USDA APHIS PPQ
- Managing Tropical Spiderwort in Roundup Ready Cotton - University of Georgia
- Tropical Spiderwort Identification and Control in Georgia Field Crops - University of Georgia
- Tropical Spiderwort Identification and Control - University of Florida
- Pest Fact Sheet - North American Plant Protection Organization
- Commelina sp. Identification Key - Flora of North America
- Federal Noxious Weed Disseminules of the U.S. - USDA-APHIS
- Benghal Dayflower a.k.a. Tropical Spiderwort: A New Weed in North Carolina - NCDA & CS
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EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org
State Invasive List - This map identifies those states that list this species on their invasive species list. For more information, visit Invasive.org
Most Troublesome / Most Common Agricultural Weed List
This map identifies those states that consider this species either most troublesome or most common in at least one commodity. For more information, visit the MTMC project page.
|No Data for this state|
|Troublesome or Common weed in one or more crops|
Invasive Listing Sources
- Alabama Invasive Plant Council - Watch list A
- California Noxious Weeds
- East Central Florida CISMA
- Federal Noxious Weeds
- Florida Noxious Weeds
- Georgia Exotic Pest Plant Council - Category 4
- Massachusetts Noxious Weeds
- Minnesota Noxious Weeds
- Mississippi Noxious Weeds
- Nonnative Invasive Species in Southern Forest and Grassland Ecosystems
- North Carolina Noxious Weeds - Class A
- South Carolina Exotic Pest Plant Council - Severe Threat
- South Carolina Noxious Weeds
- USDA APHIS Regulated Pest List
- Vermont Noxious Weeds
- WeedUS - Database of Plants Invading Natural Areas in the United States
|Common Name Reference:|| USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.|
|Scientific Name Reference:||USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.|