Taxonomy

Scientific Name

Ambrosia grayi
(A. Nels.) Shinners

Common Names

woollyleaf bursage, woollyleaf burr ragweed, bur ragweed, lagoonweed, woollyleaf bursage, woollyleaf franseria, woollyleaf povertyweed

Overview

Appearance: 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.
Foliage: 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.
Flowers: Flowering occurs from August to September. Ambrosia grayi produces burs that are 0.12-0.2 in. (3-5 mm) round.
Fruit: The burs are 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.

Resources

Crawford County Noxious Weeds [1]
Missouri State University [2]
USDA NRCS PLANTS [3]
USDA ARS GRIN [4]
www.eFloras.org [5]