Ambrosia dumosa (A. Gray) Payne
Franseria dumosa A. Gray
Burro Bush, Burro-weed, White Bursage
Burro bush is common in the American southwest and northwestern Mexico. Its roots grow away from those of similar species, to reduce contention for water. Creosote bush, common in the same habitats, secretes a chemical that inhibits the growth of burro bush.
Identification: Burro bush reaches up to 3' (91 cm) in height. It has many fine branches, almost resembling a porcupine. The leaves are very irregular in shape, and pale green. They remind me of lichen. Flowers are small and yellow. The seeds, which may be yellow, purple, or brown, are round in shape and sharp-pointed, like burs.
Ambrosia dumosa at the Arizona Sonora Desert Museum Sonoran Desert Digital Library
Ambrosia dumosa on CalPhotos
Ambrosia dumosa on the USDA Forest Service's Fire Effects Information Database
Ambrosia dumosa at the Lady Bird Johnson Wildflower Center
Ambrosia dumosa on DesertUSA: Exploring the Southwest
Ambrosia dumosa on Desert-tropicals.com
Ambrosia dumosa on Wikimedia Commons
Ambrosia dumosa on eFloras
Ambrosia dumosa from the Jepson Manual
Ambrosia dumosa description by Thomas H. Kent, last updated 16 Aug 2013.