Host an Event Volunteer Join Tickets

Support the plant database you love!


Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

Enter a Plant Name:
Or choose a plant family:

Ambrosia grayi

Ambrosia grayi (A. Nelson) Shinners

Woollyleaf Bur Ragweed

Asteraceae (Aster Family)

Synonym(s): Franseria tomentosa, Gaertnera tomentosa, Gaertneria grayi

USDA Symbol: AMGR5

USDA Native Status: L48 (N)


From the Image Gallery

No images of this plant

Plant Characteristics

Duration: Perennial
Habit: Herb
Size Notes: Up to about 1 foot tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: White , Yellow , Green
Bloom Time: Aug , Sep
Bloom Notes: Flowers are inconspicuous and without ray florets.


USA: CO , KS , NE , NM , OK , TX

National Wetland Indicator Status

Status: FAC FAC
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

Additional resources

USDA: Find Ambrosia grayi in USDA Plants
FNA: Find Ambrosia grayi in the Flora of North America (if available)
Google: Search Google for Ambrosia grayi


Record Modified: 2018-12-11
Research By: CBR

Go back