Annuals, 15-100+ cm. Leaf blades ± rhombic to lanceolate, 40-150+ × 25-95+ mm, lengths 1-2(-3+) times widths, margins coarsely toothed or entire. Peduncles 1-12+ cm. Outer phyllaries 5, connate ¹/4-¹/3 their lengths, ovate to orbiculate, 3.5-6 mm. Ray florets 8-13; corollas yellow-orange, laminae oblong-elliptic, 3.5-7+ × 1.6-3+ mm. Disc florets 40-70+. Fruits 2.8-4+ mm. 2n = 24. Flowering year round. Disturbed sites; 0-10+ m; introduced; Fla.; Mexico; West Indies (Antilles); Central America; South America; introduced in Old World.