Introduced, cool-season, perennial, erect, sometimes decumbent herb, 30–100 cm tal. Stems are purplish, spreading prostrate in lower parts, rooting at nodes and hairy (but not glandular-hairy). Leaves are lanceolate or narrow-ovate, 3–12 cm long, much longer than broad, hairless or slightly hairy on veins and prominently veined. Flowerheads are corymbs with crowded heads 5–6 mm wide. Involucral bracts are 2-seriate, hairy and green to purplish. Florets are all tubular and white. Flowering is in winter and spring. A native of central America, it grows in disturbed damp sites, often in or near rainforest.
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