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Tridax procumbens L.

Weedy herb; leaves opposite, simple, ovate, base cuneate, margin toothed, apex acute; inflorescence a long-pedicelled head; ray florets pale yellow; disk florets bright yellow; fruits with a radiating crown of pappus bristles.

Additional images:

• habit
• leaves and flower head
• leaves, flower head, and fruiting head (photographed in Merida)
• flower head
• flower head
• fruiting heads