canyon ragweed Asteraceae Ambrosia
ambrosioides (Cav.) Payne
Leaf: Alternate, simple, evergreen, elongated triangular to lance-shaped, coarse serrate or toothed, green above and below but covered in pale pubescence, drought deciduous.
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, 1 inch long.
Twig: Reddish brown with white pubescence, stout, brittle, narrow leaf scars.
Bark: Reddish brown and becoming smooth and shiny.
Form: A gangling, sprawling shrub to 6 feet.
Looks like: white bursage - San Diego bursage - triangleleaf bursage