| General Information |
| Distribution | Native from southeastern Arizona and Mexico south to Peru and Argentina and the West Indies.In the Hawaiian Islands,
naturalized on
Moloka`i, Lana`i, Maui, Kaho`olawe, Hawai`i.
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Habit
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Annual herbs 2-9 dm tall, strigose to hirsute.
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Leaves
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Leaves narrowly lanceolate to broadly ovate or elliptic, usually 3-7 cm long, 0.6-3 cm wide, base cuneate to truncate, subsessile.
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Flowers
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At least the central peduncles often inflated below the heads, rays usually maroon, sometimes burnt orange, rusty
red, scarlet, or yellow, obovate, 8-25 mm long; disk corollas purple to blackish toward apex, ca. 4 mm long; pappus of disk achenes with 1 prominent awn, that of ray achenes awnless or with low tufts of hairs.
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Fruit
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Ray achenes 9-10 mm long, disk achenes 7-9 mm long.
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Chromosomes
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2n = 24
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