Weakleaf Bur Ragweed

Weakleaf Burr Ragweed, Weakleaf Bur Ragweed, Weakleaf Bursage

Ambrosia confertiflora DC.

Asteraceae (Sunflower Family)

▲ ▼ young plants emerging from creeping rootstocks

▲ ▼ young plants

▲ mature leaf

▲ mature plants with flowers

▲ ▼ inflorescences

Ambrosia confertiflora DC., Weak-leaf Bur Ragweed, Weak-leaf Bursage: (Bayer Code: FRSCO; US Code AMCO3)

Creeping perennial appearing similar to skeletonleaf bursage, but weakleaf bur ragweed is more green with strong bad odor, compared to the more medicinal odor, grayer-leaved skeletonleaf bursage
Leaves more similar-colored on both sides of leaves, and has glands on leaves that add to the bad odor
Grows 1-3 feet tall, preferring dry, sandy soils

(Photos taken at Dead Horse Ranch State Park near Cottonwood, Arizona)

(Posted January 19, 2019)