- Ambrosia grayi is a perennial that can grow up to 3.9-11.8 in. (10-30 cm) tall. Ambrosia grayi has many different common names: Bur Ragweed, Woollyleaf bursage and Lagoonweed.
- The leaves are opposite and have a dusty green color. They can grow up to 0.39-1.8 in. (10-45 mm) in length. The stems are erect.
- Flowering occurs from August to September. Ambrosia grayi produces burs that are 0.12-0.2 in. (3-5 mm) round.
- The fruits are burs that contain the seeds.
- Ecological Threat
- Ambrosia grayi can be found infesting roadsides, ditches, fields and mid wet areas. This plant can easily transplanted by its burs. The burs can attach themselves to clothes, people and animals. This plant is native to northern Mexico.
Howard F. Schwartz
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 Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit Invasive.org
Invasive Listing Sources
Other System LinksPlants: AMGR5
NPDN Pest: PBFAEBI
NPDN Host: 36308
|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.|