Annual Bursage

Annual Bursage, Burr Ragweed

Ambrosia acanthicarpa Hook.

Asteraceae (Sunflower Family)

▲ ▼ young plants

▲ young plant

▲ ▼ mature plants

▲ ▼ close-up of leaves

Ambrosia acanthicarpa Hook., Annual Bursage: (Bayer Code: FRSAC; US Code AMAC2)

A summer annual weed in the same genus as common ragweed, but found more in the western part of the Midwest
Leaves often have more grayish hairs than annual ragweed, and are stiffer in texture, plus have a medicinal or bad odor if bruised
Inflorescence is similar to common ragweed, but is followed by large, burred seeds, with spiny burs
Found in disturbed, sandy, dry soils

(Updated January 19, 2019)