Ragweed,Yellow - Amauriopsis dissecta

(Ragleaf Bahia, Yellow Ragweed)

Family: Aster - (Asteraceae) Native


In front of the Visitor Center (N35D33'01.218 X W105D41'08.849)

Flowers first observed: 8/25/17

Plant w/Flowers

The Flowers

The Leaf


"w US from CA to WY, south to TX; n MEX." (SEINet)


"Usually biennial herb, sometimes persisting longer, to 80 cm tall; stems glandular, light bluish-green, branching above the base. Leaves: Basal and alternate-cauline; petiolate; 2-3 times ternately cleft (divided and re-divided into 3 lobes), the final segments linear or oblong; entire leaf to 7 cm long, puberulent. Flowers: Flower heads large, radiate, in loose, few-flowered panicles at branch tips, on 1-6 cm peduncles; involucres hemispheric, 5-6 mm high, the bracts in 2 series, glandular-hairy, cuspidate at the tips; 10-15 pistillate ray flowers ring the outside of the head, the rays 6-9 mm long, yellow; remaining flowers are 30-80 yellow discs (radial, bisexual, with a 5-lobed corolla), 3 mm high. Fruits: Achenes black, 4-angled, without pappus." (SEINet)

Ethnobotanical Uses


"An infusion of the plant was used as a cathartic, emetic, contraceptive, to ease menstural pain, and for headache, rheumatism and arthritis." (SEINet)

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