white bursage Asteraceae Ambrosia
dumosa (A. Gray) Payne symbol: AMDU2
Leaf: Alternate, may be simple or deeply lobed or multi-pinnately compound, coarse serrate or toothed, green above and below but covered in dense pale pubescence, minute, drought deciduous and often absent.
Flower: Dull yellow-green, in small clusters borne on a spike, present in late winter to early spring.
Fruit: A spiny bur with slender spines, to 3/8 inch long.
Twig: Covered in gray pubescence, slender, stiff, narrow leaf scars.
Bark: Reddish brown and becoming smooth and shiny.
Form: A rounded shrub to less than 3 feet tall.
Looks like: canyon ragweed - San Diego bursage - triangleleaf bursage
Additional Range Information: Ambrosia dumosa is native to North America. Range may be expanded by planting. See states reporting white bursage.
External Links: USDAFS FEIS Silvics - USDA Plants Database
All material © 2018 Virginia Tech Dept. of Forest Resources and Environmental Conservation; Photos and text by: John Seiler, Edward Jensen, Alex Niemiera, and John Peterson; Silvics reprinted from Ag Handbook 654; range maps courtesy USGS from USDA "Atlas of United States Trees" by Elbert L. Little, Jr., Vol. 1 (1971) 3 (1976) 4 (1977) 5 (1978)