| General Information |
| Distribution | Apparently native to the American tropics and warm temperate regions, now naturalized in other parts of the world.In the Hawaiian Islands,
naturalized on
Maui, Hawai`i.
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Habit
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Stems slender, rooting at the nodes, up to 0.5(-0.8) m long.
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Leaves
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Leaf blades usually 1.5-6 cm long.
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Flowers
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Pedicels filiform, usually shorter than subtending petioles; involucral bracts 3.5-5.5 mm long, up to 2.2 mm wide; calyx 4-7 mm long, accrescent and clasping in fruit; petals 5-8 mm long.
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Fruit
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Schizocarp 7.5-10 mm in diameter, mericarps up to 4 mm long and 3.5 mm wide, awns 1-3 mm long.
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Seeds
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Seeds 1-1.5 mm long.
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Chromosomes
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2n = 18
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