- Tridax procumbens is a perennial herb that has a creeping stem which can reach from to 8-30 inches (20-75 cm) long.
- The leaves of Tridax procumbens are opposite, pinnate, oblong to ovate, and 1-2 inches (2.5-5 cm) long with cuneate bases, coarsely serrate margins, and acute apexes.
- Tridax procumbens flowers have white rays and yellow disk flowers. They are about 0.4-0.6 inches (1-1.5 cm) wide, and held on a 4-12 inches (10-30 cm) long stalk. Flowering occurs in spring.
- Fruits are achenes that are dark brown to black in color, oblong, and 0.08 inches (2 mm) long, each with a head of pappus bristles that vary from 0.12-0.24 inches (3-6 mm) long.
- Ecological Threat
- Tridax procumbens is listed as a Federal Noxious Weed. It prefers coarse-textured soils in more tropical locations. It invades roadsides, crops, waste land, and fallow land. It is native to Mexico and South America, but has become an invasive problem around the world.
- Federal Noxious Weed Disseminules of the U.S. - USDA-APHIS
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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
Invasive Listing Sources
- California Noxious Weeds
- East Central Florida CISMA
- Federal Noxious Weeds
- Florida Noxious Weeds
- Massachusetts Noxious Weeds
- Minnesota Noxious Weeds
- Nonnative Invasive Species in Southern Forest and Grassland Ecosystems
- North Carolina Noxious Weeds - Class A
- South Carolina Noxious Weeds
- USDA APHIS Regulated Pest List
- Vermont Noxious Weeds
Other System LinksPlants: TRPR5
NPDN Pest: PBFEOBA
NPDN Host: 37140
|Common Name Reference:|| Weed Science Society of America Common Names List|
|Scientific Name Reference:||USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.|