| General Information |
| Distribution | Native from Mexico to Brazil and Argentina; naturalized in many other parts of the world.In the Hawaiian Islands,
naturalized on
Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Kaho`olawe, Hawai`i.
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Habit
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Annual herb, 0.5‒2.5 m tall, glabrous or pubescent, hairs spreading.
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Leaves
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Leaves usually petiolate; blade lanceolate to narrowly ovate, 4‒25 cm long, 2‒10 cm wide, usually deeply pinnately lobed, margin coarsely dentate or serrate; petiole 0‒8.5 cm long, sometimes winged.
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Flowers
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Heads erect; involucral bracts 12‒14(‒16), 7‒8 mm long; corollas yellowish to pale purple; pappus pink to pale purple.
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Chromosomes
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2n = 20, 40
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Contributor
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Nancy Khan
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