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Scientific Name: Ambrosia ambrosioides
Common Name: Canyon Ragweed
Family: Asteraceae, Sunflower Family
Size: Up to 6 feet.
Growth Form: Subshrub, shrub; tall, erect to sprawling, multiple stems, bristly white hairs, stems reddish-brown.
Leaves: Dark green; up to 8 inch, petiolate, mostly alternate, lanceolate or narrowly triangular; margins sharply toothed, hairy and sticky.
Flower Color: Dull yellow or yellowish-green; inconspicuous, male and female flowers; inflorescence a spike on terminal or lateral flower heads, fruit is a small fusiform burr with spines and hooks.
Flowering Season: March to May.
Comments: Distinctive smell helps to distinguish this plant in season with its sweet odor, along with the large toothed and very green leaves.